{"id":54314,"date":"2025-08-13T01:59:51","date_gmt":"2025-08-12T17:59:51","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/54314.html"},"modified":"2025-08-13T01:59:51","modified_gmt":"2025-08-12T17:59:51","slug":"qt-socket-%e7%bc%96%e7%a8%8b%ef%bc%9a%e4%bb%8e%e9%9b%b6%e5%bc%80%e5%a7%8b%e6%90%ad%e5%bb%ba%e6%9c%8d%e5%8a%a1%e7%ab%af%e4%b8%8e%e5%ae%a2%e6%88%b7%e7%ab%af","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/54314.html","title":{"rendered":"Qt Socket \u7f16\u7a0b\uff1a\u4ece\u96f6\u5f00\u59cb\u642d\u5efa\u670d\u52a1\u7aef\u4e0e\u5ba2\u6237\u7aef"},"content":{"rendered":"<\/p>\n<h4>\u6587\u7ae0\u76ee\u5f55<\/h4>\n<ul>\n<li>\n<ul>\n<li>**Qt Socket \u7f16\u7a0b&#xff1a;\u4ece\u96f6\u5f00\u59cb\u642d\u5efa\u670d\u52a1\u7aef\u4e0e\u5ba2\u6237\u7aef**<\/li>\n<li>\n<ul>\n<li>**\u5f15\u8a00**<\/li>\n<li>**\u4e00\u3001\u57fa\u7840\u6982\u5ff5**<\/li>\n<li>\n<ul>\n<li>**1. TCP \u670d\u52a1\u7aef**<\/li>\n<li>**2. TCP \u5ba2\u6237\u7aef**<\/li>\n<\/ul>\n<\/li>\n<li>**\u4e8c\u3001\u5982\u4f55\u642d\u5efa\u670d\u52a1\u7aef**<\/li>\n<li>\n<ul>\n<li>**2.1 \u670d\u52a1\u7aef\u7c7b\u8bbe\u8ba1**<\/li>\n<li>**2.2 \u521b\u5efa\u670d\u52a1\u7aef\u7c7b**<\/li>\n<li>\n<ul>\n<li>**Server.h** \u2014 \u670d\u52a1\u7aef\u5934\u6587\u4ef6<\/li>\n<\/ul>\n<\/li>\n<li>**2.3 \u6784\u9020\u51fd\u6570\u548c &#096;getInstance()&#096;**<\/li>\n<li>**2.4 &#096;startServer()&#096; \u65b9\u6cd5**<\/li>\n<li>**2.5 \u5904\u7406\u65b0\u8fde\u63a5 &#096;onNewConnection()&#096;**<\/li>\n<li>**2.6 \u8bfb\u53d6\u5ba2\u6237\u7aef\u6570\u636e &#096;onReadyRead()&#096;**<\/li>\n<li>**2.7 \u5904\u7406\u5ba2\u6237\u7aef\u65ad\u5f00\u8fde\u63a5 &#096;onDisconnected()&#096;**<\/li>\n<\/ul>\n<\/li>\n<li>**\u4e09\u3001\u642d\u5efa TCP \u5ba2\u6237\u7aef**<\/li>\n<li>\n<ul>\n<li>**3.1 \u521b\u5efa\u5ba2\u6237\u7aef\u7c7b**<\/li>\n<li>\n<ul>\n<li>**Client.h** \u2014 \u5ba2\u6237\u7aef\u5934\u6587\u4ef6<\/li>\n<\/ul>\n<\/li>\n<li>**3.2 \u5ba2\u6237\u7aef\u8fde\u63a5\u670d\u52a1\u7aef**<\/li>\n<li>**3.3 \u89e3\u91ca\u6bcf\u4e2a\u51fd\u6570\u548c\u53c2\u6570**<\/li>\n<\/ul>\n<\/li>\n<li>**\u56db\u3001\u603b\u7ed3**<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h3>Qt Socket \u7f16\u7a0b&#xff1a;\u4ece\u96f6\u5f00\u59cb\u642d\u5efa\u670d\u52a1\u7aef\u4e0e\u5ba2\u6237\u7aef<\/h3>\n<h4>\u5f15\u8a00<\/h4>\n<p>\u5728\u7f51\u7edc\u7f16\u7a0b\u4e2d&#xff0c;Socket \u901a\u4fe1 \u662f\u5b9e\u73b0\u8ba1\u7b97\u673a\u7f51\u7edc\u4e2d\u8fdb\u7a0b\u95f4\u901a\u4fe1\u7684\u5173\u952e\u6280\u672f\u3002Qt \u63d0\u4f9b\u4e86\u975e\u5e38\u4fbf\u5229\u7684\u7c7b\u6765\u5e2e\u52a9\u6211\u4eec\u5b9e\u73b0\u7f51\u7edc\u901a\u4fe1&#xff0c;\u7279\u522b\u662f QTcpServer \u548c QTcpSocket&#xff0c;\u5b83\u4eec\u4e3a\u57fa\u4e8e TCP \u534f\u8bae\u7684\u5ba2\u6237\u7aef\u4e0e\u670d\u52a1\u7aef\u901a\u4fe1\u63d0\u4f9b\u4e86\u5f88\u597d\u7684\u652f\u6301\u3002<\/p>\n<p>\u901a\u8fc7\u8fd9\u7bc7\u535a\u5ba2&#xff0c;\u6211\u4eec\u5c06\u901a\u8fc7\u4e00\u4e2a\u7b80\u5355\u7684\u4f8b\u5b50&#xff0c;\u9010\u6b65\u642d\u5efa Qt \u670d\u52a1\u7aef \u548c \u5ba2\u6237\u7aef&#xff0c;\u5e76\u8be6\u7ec6\u8bb2\u89e3\u5404\u4e2a\u51fd\u6570\u3001\u53c2\u6570\u7684\u4f7f\u7528&#xff0c;\u5e2e\u52a9\u4f60\u638c\u63e1 Qt Socket \u7f16\u7a0b\u3002<\/p>\n<hr \/>\n<h4>\u4e00\u3001\u57fa\u7840\u6982\u5ff5<\/h4>\n<p>\u5728\u8fdb\u884c Socket \u901a\u4fe1\u4e4b\u524d&#xff0c;\u6211\u4eec\u9700\u8981\u4e86\u89e3\u4e24\u4e2a\u57fa\u672c\u7684\u6982\u5ff5&#xff1a;TCP \u5ba2\u6237\u7aef \u548c TCP \u670d\u52a1\u7aef\u3002<\/p>\n<h5>1. TCP \u670d\u52a1\u7aef<\/h5>\n<ul>\n<li>\u670d\u52a1\u7aef\u7684\u804c\u8d23\u662f&#xff1a;\u76d1\u542c\u5ba2\u6237\u7aef\u8fde\u63a5&#xff0c;\u5e76\u4e14\u5904\u7406\u6765\u81ea\u5ba2\u6237\u7aef\u7684\u6570\u636e\u8bf7\u6c42\u3002<\/li>\n<li>\u670d\u52a1\u7aef\u4f7f\u7528 QTcpServer \u7c7b\u6765\u76d1\u542c\u5ba2\u6237\u7aef\u7684\u8fde\u63a5\u8bf7\u6c42\u3002<\/li>\n<\/ul>\n<h5>2. TCP \u5ba2\u6237\u7aef<\/h5>\n<ul>\n<li>\u5ba2\u6237\u7aef\u7684\u804c\u8d23\u662f&#xff1a;\u8fde\u63a5\u5230\u670d\u52a1\u7aef&#xff0c;\u53d1\u9001\u6570\u636e\u5e76\u63a5\u6536\u670d\u52a1\u7aef\u8fd4\u56de\u7684\u6570\u636e\u3002<\/li>\n<li>\u5ba2\u6237\u7aef\u4f7f\u7528 QTcpSocket \u7c7b\u6765\u8fdb\u884c\u8fde\u63a5\u3001\u53d1\u9001\u6570\u636e\u548c\u63a5\u6536\u6570\u636e\u3002<\/li>\n<\/ul>\n<h4>\u4e8c\u3001\u5982\u4f55\u642d\u5efa\u670d\u52a1\u7aef<\/h4>\n<h5>2.1 \u670d\u52a1\u7aef\u7c7b\u8bbe\u8ba1<\/h5>\n<p>\u6211\u4eec\u9996\u5148\u4ece \u670d\u52a1\u7aef \u5f00\u59cb\u3002\u670d\u52a1\u7aef\u7684\u4e3b\u8981\u4efb\u52a1\u662f\u76d1\u542c\u6307\u5b9a\u7684\u7aef\u53e3&#xff0c;\u63a5\u6536\u5ba2\u6237\u7aef\u7684\u8fde\u63a5\u8bf7\u6c42&#xff0c;\u5e76\u4e0e\u6bcf\u4e2a\u8fde\u63a5\u7684\u5ba2\u6237\u7aef\u8fdb\u884c\u6570\u636e\u4ea4\u6362\u3002<\/p>\n<h5>2.2 \u521b\u5efa\u670d\u52a1\u7aef\u7c7b<\/h5>\n<p>\u670d\u52a1\u7aef\u7c7b\u9700\u8981\u4f7f\u7528 QTcpServer \u6765\u542f\u52a8\u670d\u52a1\u5e76\u76d1\u542c\u7aef\u53e3&#xff1b;\u540c\u65f6&#xff0c;\u4f7f\u7528 QTcpSocket \u6765\u4e0e\u6bcf\u4e2a\u8fde\u63a5\u7684\u5ba2\u6237\u7aef\u8fdb\u884c\u6570\u636e\u901a\u4fe1\u3002<\/p>\n<h6>Server.h \u2014 \u670d\u52a1\u7aef\u5934\u6587\u4ef6<\/h6>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">ifndef<\/span> <span class=\"token expression\">SERVER_H<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">SERVER_H<\/span><\/span><\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;QTcpServer&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;QTcpSocket&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;QList&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;QObject&gt;<\/span><\/span><\/p>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Server<\/span> <span class=\"token operator\">:<\/span> <span class=\"token base-clause\"><span class=\"token keyword\">public<\/span> <span class=\"token class-name\">QObject<\/span><\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    Q_OBJECT<\/p>\n<p><span class=\"token keyword\">public<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token keyword\">static<\/span> Server<span class=\"token operator\">*<\/span> <span class=\"token function\">getInstance<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u83b7\u53d6\u5355\u4f8b\u5b9e\u4f8b<\/span><br \/>\n    <span class=\"token keyword\">void<\/span> <span class=\"token function\">startServer<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u542f\u52a8\u670d\u52a1\u5668&#xff0c;\u5f00\u59cb\u76d1\u542c\u5ba2\u6237\u7aef\u8fde\u63a5<\/span><\/p>\n<p><span class=\"token keyword\">private<\/span> slots<span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token keyword\">void<\/span> <span class=\"token function\">onNewConnection<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u5904\u7406\u65b0\u8fde\u63a5<\/span><br \/>\n    <span class=\"token keyword\">void<\/span> <span class=\"token function\">onReadyRead<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u8bfb\u53d6\u5ba2\u6237\u7aef\u6570\u636e<\/span><br \/>\n    <span class=\"token keyword\">void<\/span> <span class=\"token function\">onDisconnected<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u5904\u7406\u5ba2\u6237\u7aef\u65ad\u5f00\u8fde\u63a5<\/span><\/p>\n<p><span class=\"token keyword\">private<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token function\">Server<\/span><span class=\"token punctuation\">(<\/span>QObject <span class=\"token operator\">*<\/span>parent <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">nullptr<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u6784\u9020\u51fd\u6570\u79c1\u6709\u5316&#xff0c;\u9632\u6b62\u5916\u90e8\u5b9e\u4f8b\u5316<\/span><br \/>\n    <span class=\"token function\">Server<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">const<\/span> Server<span class=\"token operator\">&amp;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">delete<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u7981\u6b62\u62f7\u8d1d\u6784\u9020<\/span><br \/>\n    Server<span class=\"token operator\">&amp;<\/span> <span class=\"token keyword\">operator<\/span><span class=\"token operator\">&#061;<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">const<\/span> Server<span class=\"token operator\">&amp;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">delete<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u7981\u6b62\u8d4b\u503c\u64cd\u4f5c<\/span><\/p>\n<p>    <span class=\"token keyword\">static<\/span> Server<span class=\"token operator\">*<\/span> instance<span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u9759\u6001\u6210\u5458\u53d8\u91cf&#xff0c;\u7528\u4e8e\u5b58\u50a8\u5355\u4f8b\u5b9e\u4f8b<\/span><\/p>\n<p>    QTcpServer server<span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u7528\u4e8e\u76d1\u542c\u5ba2\u6237\u7aef\u8fde\u63a5<\/span><br \/>\n    QList<span class=\"token operator\">&lt;<\/span>QTcpSocket<span class=\"token operator\">*<\/span><span class=\"token operator\">&gt;<\/span> clientSockets<span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u5b58\u50a8\u5ba2\u6237\u7aef\u8fde\u63a5\u7684\u5217\u8868<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">endif<\/span> <span class=\"token comment\">\/\/ SERVER_H<\/span><\/span><\/p>\n<h5>2.3 \u6784\u9020\u51fd\u6570\u548c getInstance()<\/h5>\n<p>\u670d\u52a1\u7aef\u4f7f\u7528 \u5355\u4f8b\u6a21\u5f0f&#xff0c;\u786e\u4fdd\u53ea\u5b58\u5728\u4e00\u4e2a Server \u5b9e\u4f8b\u3002\u8fd9\u6837\u6211\u4eec\u53ef\u4ee5\u65b9\u4fbf\u5730\u5728\u5e94\u7528\u4e2d\u8bbf\u95ee\u670d\u52a1\u7aef\u5b9e\u4f8b\u3002<\/p>\n<ul>\n<li>Server(QObject *parent &#061; nullptr)&#xff1a;\u6784\u9020\u51fd\u6570\u79c1\u6709\u5316&#xff0c;\u9632\u6b62\u5916\u90e8\u76f4\u63a5\u5b9e\u4f8b\u5316\u670d\u52a1\u7aef\u5bf9\u8c61\u3002<\/li>\n<li>getInstance()&#xff1a;\u9759\u6001\u65b9\u6cd5&#xff0c;\u786e\u4fdd Server \u7c7b\u53ea\u6709\u4e00\u4e2a\u5b9e\u4f8b\u3002\u5982\u679c\u5b9e\u4f8b\u4e0d\u5b58\u5728&#xff0c;\u5c31\u521b\u5efa\u5b83\u3002<\/li>\n<\/ul>\n<h5>2.4 startServer() \u65b9\u6cd5<\/h5>\n<p>startServer() \u65b9\u6cd5\u542f\u52a8 QTcpServer&#xff0c;\u5e76\u5f00\u59cb\u76d1\u542c\u5ba2\u6237\u7aef\u8fde\u63a5\u3002<\/p>\n<p><span class=\"token keyword\">void<\/span> <span class=\"token class-name\">Server<\/span><span class=\"token double-colon punctuation\">::<\/span><span class=\"token function\">startServer<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span>server<span class=\"token punctuation\">.<\/span><span class=\"token function\">listen<\/span><span class=\"token punctuation\">(<\/span>QHostAddress<span class=\"token double-colon punctuation\">::<\/span>Any<span class=\"token punctuation\">,<\/span> <span class=\"token number\">5555<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token function\">qCritical<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;Server failed to start:&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> server<span class=\"token punctuation\">.<\/span><span class=\"token function\">errorString<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">else<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token function\">qDebug<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;Server started on port 5555&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<ul>\n<li>listen(QHostAddress::Any, 5555)&#xff1a;listen() \u65b9\u6cd5\u4f7f\u670d\u52a1\u7aef\u5f00\u59cb\u76d1\u542c\u6765\u81ea \u4efb\u610f\u7f51\u7edc\u5730\u5740 \u7684\u8fde\u63a5\u8bf7\u6c42&#xff0c;\u5e76\u6307\u5b9a\u7aef\u53e3\u53f7 5555\u3002<\/li>\n<li>QHostAddress::Any&#xff1a;\u8868\u793a\u670d\u52a1\u5668\u53ef\u4ee5\u76d1\u542c\u672c\u5730\u8ba1\u7b97\u673a\u4e0a\u7684\u6240\u6709\u7f51\u7edc\u63a5\u53e3&#xff08;\u5305\u62ec\u672c\u5730\u56de\u73af\u5730\u5740 127.0.0.1 \u548c\u7f51\u7edc\u5730\u5740 0.0.0.0&#xff09;\u3002<\/li>\n<li>server.errorString()&#xff1a;\u5982\u679c\u76d1\u542c\u5931\u8d25&#xff0c;\u8f93\u51fa\u9519\u8bef\u4fe1\u606f\u3002<\/li>\n<\/ul>\n<h5>2.5 \u5904\u7406\u65b0\u8fde\u63a5 onNewConnection()<\/h5>\n<p>\u5f53\u6709\u5ba2\u6237\u7aef\u8fde\u63a5\u65f6&#xff0c;QTcpServer \u4f1a\u53d1\u51fa newConnection() \u4fe1\u53f7&#xff0c;\u6211\u4eec\u901a\u8fc7\u4fe1\u53f7\u548c\u69fd\u673a\u5236\u6765\u5904\u7406\u8fd9\u4e2a\u4fe1\u53f7\u3002<\/p>\n<p><span class=\"token keyword\">void<\/span> <span class=\"token class-name\">Server<\/span><span class=\"token double-colon punctuation\">::<\/span><span class=\"token function\">onNewConnection<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    QTcpSocket <span class=\"token operator\">*<\/span>clientSocket <span class=\"token operator\">&#061;<\/span> server<span class=\"token punctuation\">.<\/span><span class=\"token function\">nextPendingConnection<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">connect<\/span><span class=\"token punctuation\">(<\/span>clientSocket<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>QTcpSocket<span class=\"token double-colon punctuation\">::<\/span>readyRead<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>Server<span class=\"token double-colon punctuation\">::<\/span>onReadyRead<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">connect<\/span><span class=\"token punctuation\">(<\/span>clientSocket<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>QTcpSocket<span class=\"token double-colon punctuation\">::<\/span>disconnected<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>Server<span class=\"token double-colon punctuation\">::<\/span>onDisconnected<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    clientSockets<span class=\"token punctuation\">.<\/span><span class=\"token function\">append<\/span><span class=\"token punctuation\">(<\/span>clientSocket<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">qDebug<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;New client connected&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<ul>\n<li>server.nextPendingConnection()&#xff1a;\u8fd4\u56de\u4e00\u4e2a\u65b0\u7684 QTcpSocket \u5bf9\u8c61&#xff0c;\u8868\u793a\u4e0e\u5ba2\u6237\u7aef\u7684\u8fde\u63a5\u3002<\/li>\n<li>readyRead \u4fe1\u53f7&#xff1a;\u5f53\u5ba2\u6237\u7aef\u6709\u6570\u636e\u53d1\u9001\u8fc7\u6765\u65f6&#xff0c;\u89e6\u53d1 readyRead() \u4fe1\u53f7&#xff0c;\u8c03\u7528 onReadyRead() \u51fd\u6570\u6765\u5904\u7406\u6570\u636e\u3002<\/li>\n<li>disconnected \u4fe1\u53f7&#xff1a;\u5f53\u5ba2\u6237\u7aef\u65ad\u5f00\u8fde\u63a5\u65f6&#xff0c;\u89e6\u53d1 disconnected() \u4fe1\u53f7&#xff0c;\u8c03\u7528 onDisconnected() \u6765\u5904\u7406\u65ad\u5f00\u3002<\/li>\n<\/ul>\n<h5>2.6 \u8bfb\u53d6\u5ba2\u6237\u7aef\u6570\u636e onReadyRead()<\/h5>\n<p>onReadyRead() \u69fd\u51fd\u6570\u5904\u7406\u5ba2\u6237\u7aef\u53d1\u9001\u6765\u7684\u6570\u636e\u3002<\/p>\n<p><span class=\"token keyword\">void<\/span> <span class=\"token class-name\">Server<\/span><span class=\"token double-colon punctuation\">::<\/span><span class=\"token function\">onReadyRead<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    QTcpSocket <span class=\"token operator\">*<\/span>clientSocket <span class=\"token operator\">&#061;<\/span> <span class=\"token generic-function\"><span class=\"token function\">qobject_cast<\/span><span class=\"token generic class-name\"><span class=\"token operator\">&lt;<\/span>QTcpSocket <span class=\"token operator\">*<\/span><span class=\"token operator\">&gt;<\/span><\/span><\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">sender<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>clientSocket<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        QByteArray data <span class=\"token operator\">&#061;<\/span> clientSocket<span class=\"token operator\">-&gt;<\/span><span class=\"token function\">readAll<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u8bfb\u53d6\u5ba2\u6237\u7aef\u53d1\u9001\u7684\u6240\u6709\u6570\u636e<\/span><br \/>\n        <span class=\"token function\">qDebug<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;Received from client:&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> data<span class=\"token punctuation\">;<\/span><br \/>\n        clientSocket<span class=\"token operator\">-&gt;<\/span><span class=\"token function\">write<\/span><span class=\"token punctuation\">(<\/span>data<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u56de\u663e\u6570\u636e<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<ul>\n<li>readAll()&#xff1a;\u8bfb\u53d6\u5ba2\u6237\u7aef\u53d1\u9001\u7684\u6240\u6709\u6570\u636e\u3002<\/li>\n<li>write()&#xff1a;\u56de\u663e\u6570\u636e&#xff0c;\u5c06\u63a5\u6536\u5230\u7684\u6570\u636e\u53d1\u9001\u56de\u5ba2\u6237\u7aef\u3002<\/li>\n<\/ul>\n<h5>2.7 \u5904\u7406\u5ba2\u6237\u7aef\u65ad\u5f00\u8fde\u63a5 onDisconnected()<\/h5>\n<p>\u5f53\u5ba2\u6237\u7aef\u65ad\u5f00\u8fde\u63a5\u65f6&#xff0c;\u6211\u4eec\u9700\u8981\u6e05\u7406\u8be5\u8fde\u63a5\u3002<\/p>\n<p><span class=\"token keyword\">void<\/span> <span class=\"token class-name\">Server<\/span><span class=\"token double-colon punctuation\">::<\/span><span class=\"token function\">onDisconnected<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    QTcpSocket <span class=\"token operator\">*<\/span>clientSocket <span class=\"token operator\">&#061;<\/span> <span class=\"token generic-function\"><span class=\"token function\">qobject_cast<\/span><span class=\"token generic class-name\"><span class=\"token operator\">&lt;<\/span>QTcpSocket <span class=\"token operator\">*<\/span><span class=\"token operator\">&gt;<\/span><\/span><\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">sender<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>clientSocket<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        clientSockets<span class=\"token punctuation\">.<\/span><span class=\"token function\">removeAll<\/span><span class=\"token punctuation\">(<\/span>clientSocket<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u4ece\u5217\u8868\u4e2d\u79fb\u9664\u65ad\u5f00\u7684\u5ba2\u6237\u7aef<\/span><br \/>\n        clientSocket<span class=\"token operator\">-&gt;<\/span><span class=\"token function\">deleteLater<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u5220\u9664\u5ba2\u6237\u7aef\u8fde\u63a5<\/span><br \/>\n        <span class=\"token function\">qDebug<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;Client disconnected&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<ul>\n<li>removeAll(clientSocket)&#xff1a;\u4ece clientSockets \u5217\u8868\u4e2d\u79fb\u9664\u65ad\u5f00\u7684\u5ba2\u6237\u7aef\u3002<\/li>\n<li>deleteLater()&#xff1a;\u5220\u9664\u5ba2\u6237\u7aef\u8fde\u63a5\u5bf9\u8c61&#xff0c;\u91ca\u653e\u5185\u5b58\u3002<\/li>\n<\/ul>\n<hr \/>\n<h4>\u4e09\u3001\u642d\u5efa TCP \u5ba2\u6237\u7aef<\/h4>\n<p>\u5ba2\u6237\u7aef\u7684\u4efb\u52a1\u662f\u8fde\u63a5\u5230\u670d\u52a1\u7aef&#xff0c;\u53d1\u9001\u6570\u636e\u5e76\u63a5\u6536\u670d\u52a1\u7aef\u7684\u54cd\u5e94\u3002\u5ba2\u6237\u7aef\u4f7f\u7528 QTcpSocket \u6765\u5b9e\u73b0\u3002<\/p>\n<h5>3.1 \u521b\u5efa\u5ba2\u6237\u7aef\u7c7b<\/h5>\n<p>\u5ba2\u6237\u7aef\u7c7b\u5c06\u901a\u8fc7 QTcpSocket \u8fde\u63a5\u5230\u670d\u52a1\u7aef&#xff0c;\u53d1\u9001\u6570\u636e&#xff0c;\u5e76\u63a5\u6536\u670d\u52a1\u7aef\u7684\u54cd\u5e94\u3002<\/p>\n<h6>Client.h \u2014 \u5ba2\u6237\u7aef\u5934\u6587\u4ef6<\/h6>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">ifndef<\/span> <span class=\"token expression\">CLIENT_H<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">CLIENT_H<\/span><\/span><\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;QTcpSocket&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;QHostAddress&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;QObject&gt;<\/span><\/span><\/p>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Client<\/span> <span class=\"token operator\">:<\/span> <span class=\"token base-clause\"><span class=\"token keyword\">public<\/span> <span class=\"token class-name\">QObject<\/span><\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    Q_OBJECT<\/p>\n<p><span class=\"token keyword\">public<\/span><span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token function\">Client<\/span><span class=\"token punctuation\">(<\/span>QObject <span class=\"token operator\">*<\/span>parent <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">nullptr<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">private<\/span> slots<span class=\"token operator\">:<\/span><br \/>\n    <span class=\"token keyword\">void<\/span> <span class=\"token function\">onConnected<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u6210\u529f\u8fde\u63a5\u5230\u670d\u52a1\u7aef<\/span><br \/>\n    <span class=\"token keyword\">void<\/span> <span class=\"token function\">onReadyRead<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u8bfb\u53d6\u670d\u52a1\u5668\u54cd\u5e94\u7684\u6570\u636e<\/span><\/p>\n<p><span class=\"token keyword\">private<\/span><span class=\"token operator\">:<\/span><br \/>\n    QTcpSocket socket<span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u5ba2\u6237\u7aef\u7684\u5957\u63a5\u5b57<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">endif<\/span> <span class=\"token comment\">\/\/ CLIENT_H<\/span><\/span><\/p>\n<h5>3.2 \u5ba2\u6237\u7aef\u8fde\u63a5\u670d\u52a1\u7aef<\/h5>\n<p>\u5ba2\u6237\u7aef\u901a\u8fc7 connectToHost() \u8fde\u63a5\u5230\u670d\u52a1\u7aef&#xff0c;\u7aef\u53e3\u53f7\u4e3a 5555\u3002<\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&#034;Client.h&#034;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;QDebug&gt;<\/span><\/span><\/p>\n<p><span class=\"token class-name\">Client<\/span><span class=\"token double-colon punctuation\">::<\/span><span class=\"token function\">Client<\/span><span class=\"token punctuation\">(<\/span>QObject <span class=\"token operator\">*<\/span>parent<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">:<\/span> <span class=\"token function\">QObject<\/span><span class=\"token punctuation\">(<\/span>parent<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token comment\">\/\/ \u8fde\u63a5\u5230\u670d\u52a1\u7aef<\/span><br \/>\n    socket<span class=\"token punctuation\">.<\/span><span class=\"token function\">connectToHost<\/span><span class=\"token punctuation\">(<\/span>QHostAddress<span class=\"token double-colon punctuation\">::<\/span>LocalHost<span class=\"token punctuation\">,<\/span> <span class=\"token number\">5555<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token function\">connect<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>socket<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>QTcpSocket<span class=\"token double-colon punctuation\">::<\/span>connected<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>Client<span class=\"token double-colon punctuation\">::<\/span>onConnected<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">connect<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>socket<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>QTcpSocket<span class=\"token double-colon punctuation\">::<\/span>readyRead<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>Client<span class=\"token double-colon punctuation\">::<\/span>onReadyRead<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token keyword\">void<\/span> <span class=\"token class-name\">Client<\/span><span class=\"token double-colon punctuation\">::<\/span><span class=\"token function\">onConnected<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token function\">qDebug<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;Connected to server&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    socket<span class=\"token punctuation\">.<\/span><span class=\"token function\">write<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;Hello Server!&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u5411\u670d\u52a1\u5668\u53d1\u9001\u6570\u636e<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token keyword\">void<\/span> <span class=\"token class-name\">Client<\/span><span class=\"token double-colon punctuation\">::<\/span><span class=\"token function\">onReadyRead<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    QByteArray data <span class=\"token operator\">&#061;<\/span> socket<span class=\"token punctuation\">.<\/span><span class=\"token function\">readAll<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u8bfb\u53d6\u670d\u52a1\u5668\u8fd4\u56de\u7684\u6570\u636e<\/span><br \/>\n    <span class=\"token function\">qDebug<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;Received from server: &#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> data<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h5>3.3 \u89e3\u91ca\u6bcf\u4e2a\u51fd\u6570\u548c\u53c2\u6570<\/h5>\n<ul>\n<li>socket.connectToHost(QHostAddress::LocalHost, 5555)&#xff1a;\u8fde\u63a5\u5230\u672c\u5730\u670d\u52a1\u7aef&#xff0c;QHostAddress::LocalHost \u8868\u793a\u8fde\u63a5\u5230\u672c\u5730\u673a\u5668\u3002<\/li>\n<li>connected() \u4fe1\u53f7&#xff1a;\u8fde\u63a5\u6210\u529f\u540e\u89e6\u53d1&#xff0c;\u8c03\u7528 onConnected() \u53d1\u9001\u6570\u636e\u5230\u670d\u52a1\u7aef\u3002<\/li>\n<li>readyRead() \u4fe1\u53f7&#xff1a;\u670d\u52a1\u7aef\u53d1\u9001\u6570\u636e\u65f6\u89e6\u53d1&#xff0c;\u5ba2\u6237\u7aef\u63a5\u6536\u5e76\u8f93\u51fa\u6570\u636e\u3002<\/li>\n<\/ul>\n<hr \/>\n<h4>\u56db\u3001\u603b\u7ed3<\/h4>\n<p>\u5728\u8fd9\u7bc7\u535a\u5ba2\u4e2d&#xff0c;\u6211\u4eec\u5b66\u4e60\u4e86\u5982\u4f55\u4f7f\u7528 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