\u4e0a\u5468\u5728\u505a\u4e00\u4e2a\u591a\u7aef\u534f\u540c\u7684\u8bb0\u8d26\u672c\u5e94\u7528，\u9047\u5230\u4e86\u4e00\u4e2a\u6781\u5ea6\u6293\u72c2\u7684\u5ba2\u8bc9\u3002\u7528\u6237\u7528\u624b\u673a\u8bb0\u4e86\u4e00\u7b14\u201c\u9910\u996e 100 \u5143\u201d，\u7136\u540e\u7528\u5e73\u677f\u628a\u8fd9\u7b14\u8d26\u6539\u6210\u4e86\u201c\u9910\u996e 150 \u5143\u201d\u3002\u7ed3\u679c\u4e24\u53f0\u8bbe\u5907\u8054\u7f51\u4e00\u540c\u6b65，\u624b\u673a\u4e0a\u90a3\u6761\u8bb0\u5f55\u53c8\u53d8\u56de\u4e86 100 \u5143，\u4e24\u8fb9\u7684\u8d26\u5355\u6b7b\u6d3b\u5bf9\u4e0d\u4e0a\u3002\u8fd9\u4e0d\u4ec5\u662f\u4f53\u9a8c\u707e\u96be，\u66f4\u662f\u903b\u8f91\u6f0f\u6d1e\u3002<\/p>\n
\u9ed8\u8ba4\u540c\u6b65\u7b56\u7565\u7684\u5e95\u5c42\u7384\u673a
\n\u9e3f\u8499\u7684\u5206\u5e03\u5f0f\u6570\u636e\u7ba1\u7406（KVStore）\u5e95\u5c42\u7528\u7684\u662f\u57fa\u4e8e\u65f6\u95f4\u6233\u7684\u201c\u6700\u540e\u5199\u5165\u8005\u80dc\u51fa（Last-Write-Wins）\u201d\u7b56\u7565\u3002\u542c\u8d77\u6765\u5f88\u5408\u7406，\u5bf9\u5427？\u4f46\u95ee\u9898\u51fa\u5728\u201c\u65f6\u95f4\u201d\u4e0a\u3002\u4e0d\u540c\u8bbe\u5907\u7684\u7cfb\u7edf\u65f6\u95f4\u5e76\u975e\u7edd\u5bf9\u540c\u6b65，\u624b\u673a\u6bd4\u5e73\u677f\u5feb\u4e86\u54ea\u6015\u4e94\u5206\u949f，\u624b\u673a\u4e0a\u4ea7\u751f\u7684\u4efb\u4f55\u8fc7\u671f\u6570\u636e，\u90fd\u4f1a\u5728\u540c\u6b65\u65f6\u65e0\u60c5\u5730\u8986\u76d6\u5e73\u677f\u4e0a\u7684\u6700\u65b0\u4fee\u6539\u3002<\/p>\n
\u6211\u4eec\u8d77\u521d\u5199\u7684\u4ee3\u7801\u6781\u5176\u968f\u610f，\u76f4\u63a5\u5229\u7528\u5e95\u5c42\u7684\u81ea\u52a8\u540c\u6b65：<\/p>\n
typescript<\/p>\n
import distributedKVStore from '@ohos.data.distributedKVStore';<\/p>\n
const kvManagerConfig = {
\n context: getContext(this),
\n bundleName: 'com.example.ledger'
\n};<\/p>\n
\/\/ \u521d\u59cb\u5316
\nlet kvManager = distributedKVStore.createKVManager(kvManagerConfig);
\nlet kvStore = await kvManager.getKVStore('ledger_store', {
\n securityLevel: distributedKVStore.SecurityLevel.S1
\n});<\/p>\n
\/\/ \u5199\u5165\u6570\u636e
\nawait kvStore.put('record_001', JSON.stringify({ amount: 150 }));<\/p>\n
\u6267\u884c\u8fd9\u6bb5\u4ee3\u7801\u540e，\u5982\u679c\u4f60\u6307\u671b\u5e95\u5c42\u80fd\u5b8c\u7f8e\u89e3\u51b3\u51b2\u7a81，\u90a3\u5c31\u5927\u9519\u7279\u9519\u4e86\u3002\u53ea\u8981\u7f51\u7edc\u4e00\u6ce2\u52a8，\u6216\u8005\u8bbe\u5907\u65f6\u95f4\u4e0d\u51c6，\u6570\u636e\u5fc5\u7136\u9519\u4e71\u3002<\/p>\n
\u4e1a\u52a1\u5c42\u7684\u4e50\u89c2\u9501\u4e0e\u7248\u672c\u53f7\u9632\u5fa1
\n\u8981\u5f7b\u5e95\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898，\u5fc5\u987b\u629b\u5f03\u5e95\u5c42\u7684\u65f6\u95f4\u6233，\u5728\u4e1a\u52a1\u6570\u636e\u91cc\u81ea\u5df1\u7ef4\u62a4\u4e00\u4e2a\u201c\u7248\u672c\u53f7\u201d\u3002\u6bcf\u6b21\u4fee\u6539\u6570\u636e，\u7248\u672c\u53f7\u9012\u589e\u3002\u5f53\u6536\u5230\u8fdc\u7aef\u6570\u636e\u65f6，\u5148\u6bd4\u5bf9\u7248\u672c\u53f7，\u8c01\u5927\u542c\u8c01\u7684\u3002<\/p>\n
typescript<\/p>\n
interface LedgerRecord {
\n id: string;
\n amount: number;
\n version: number; \/\/ \u6838\u5fc3：\u624b\u52a8\u7ef4\u62a4\u7684\u7248\u672c
\n}<\/p>\n
\/\/ \u76d1\u542c\u8fdc\u7aef\u6570\u636e\u53d8\u5316
\nkvStore.on('dataChange', distributedKVStore.SubscribeType.SUBSCRIBE_TYPE_REMOTE, (data) => {
\n const remoteRecord: LedgerRecord = JSON.parse(data.value);
\n const localRecordStr = kvStore.get(remoteRecord.id);<\/p>\n
if (localRecordStr) {
\n const localRecord: LedgerRecord = JSON.parse(localRecordStr);<\/p>\n
if (remoteRecord.version > localRecord.version) {
\n \/\/ \u8fdc\u7aef\u7248\u672c\u66f4\u65b0，\u63a5\u53d7\u5e76\u66f4\u65b0\u672c\u5730
\n updateLocalUI(remoteRecord);
\n } else if (remoteRecord.version === localRecord.version) {
\n \/\/ \u8b66\u793a：\u7248\u672c\u53f7\u76f8\u540c\u4f46\u91d1\u989d\u4e0d\u540c，\u8bf4\u660e\u53d1\u751f\u4e86\u5e76\u53d1\u51b2\u7a81
\n \/\/ \u4e1a\u52a1\u7b56\u7565：\u4ee5\u91d1\u989d\u8f83\u5927\u7684\u4e3a\u51c6，\u6216\u8005\u5f39\u7a97\u8ba9\u7528\u6237\u9009
\n const resolvedRecord = remoteRecord.amount > localRecord.amount ? remoteRecord : localRecord;
\n \/\/ \u5c06\u5408\u5e76\u540e\u7684\u7ed3\u679c\u63a8\u56de\u8fdc\u7aef
\n pushToRemote(resolvedRecord);
\n }
\n }
\n});<\/p>\n
\u8fd9\u6bb5\u4ee3\u7801\u8dd1\u5b8c，\u65e0\u8bba\u4e24\u7aef\u600e\u4e48\u6539，\u6570\u636e\u90fd\u4e0d\u4f1a\u51ed\u7a7a\u6d88\u5931，\u51b2\u7a81\u88ab\u7cbe\u51c6\u62e6\u622a\u5e76\u89e3\u51b3\u3002<\/p>\n
\u73af\u5883\u9694\u79bb\u4e0e\u6743\u9650\u8b66\u793a
\n\u5728\u6392\u67e5\u8fd9\u4e2a bug \u7684\u8fc7\u7a0b\u4e2d，\u6211\u8fd8\u53d1\u73b0\u4e86\u4e00\u4e2a\u6781\u5ea6\u9690\u853d\u7684\u95ee\u9898：\u6709\u65f6\u5019\u4e24\u53f0\u8bbe\u5907\u6b7b\u6d3b\u8fde\u4e0d\u4e0a，\u65e5\u5fd7\u91cc\u6ca1\u6709\u4efb\u4f55\u62a5\u9519，\u5c31\u662f\u9759\u9ed8\u5931\u8d25\u3002<\/p>\n
\u5fc5\u987b\u786e\u8ba4\u4e24\u4ef6\u4e8b：\u7b2c\u4e00，\u8bbe\u5907\u662f\u5426\u767b\u5f55\u4e86\u540c\u4e00\u4e2a\u534e\u4e3a\u8d26\u53f7；\u7b2c\u4e8c，\u5e94\u7528\u662f\u5426\u7533\u8bf7\u4e86\u5206\u5e03\u5f0f\u6743\u9650\u3002\u5f88\u591a\u65b0\u624b\u6b7b\u5728\u7b2c\u4e8c\u6b65，\u56e0\u4e3a\u5b83\u662f\u7cfb\u7edf\u7ea7\u7684\u654f\u611f\u6743\u9650，\u5fc5\u987b\u5728\u00a0module.json5\u00a0\u91cc\u58f0\u660e，\u5e76\u5728\u8fd0\u884c\u671f\u52a8\u6001\u7533\u8bf7：<\/p>\n
json<\/p>\n
{
\n "requestPermissions": [
\n { "name": "ohos.permission.DISTRIBUTED_DATASYNC" }
\n ]
\n}<\/p>\n
\u6570\u636e\u76d1\u542c\u7684\u8d44\u6e90\u91ca\u653e
\n\u6700\u540e，KVStore \u7684\u76d1\u542c\u5668\u662f\u6781\u5176\u8017\u7535\u7684\u3002\u5982\u679c\u4f60\u5728\u9875\u9762\u7684\u00a0aboutToAppear\u00a0\u91cc\u6ce8\u518c\u4e86\u76d1\u542c，\u4f46\u5728\u00a0aboutToDisappear\u00a0\u91cc\u5fd8\u4e86\u6ce8\u9500，\u5e94\u7528\u9000\u5230\u540e\u53f0\u4f9d\u7136\u5728\u75af\u72c2\u63a5\u6536\u8de8\u7aef\u6d88\u606f，\u7535\u91cf\u76f4\u63a5\u5c3f\u5d29\u3002\u5fc5\u987b\u4e25\u683c\u914d\u5bf9\u8c03\u7528\u00a0kvStore.off('dataChange')，\u5207\u65ad\u4e0d\u5fc5\u8981\u7684\u901a\u4fe1\u901a\u9053\u3002<\/p>\n
\u7efc\u5408\u6765\u770b，\u5206\u5e03\u5f0f\u6570\u636e\u540c\u6b65\u4ece\u6765\u4e0d\u662f\u5355\u7eaf\u7684 API \u8c03\u7528\u3002\u5e95\u5c42\u7684\u51b2\u7a81\u89e3\u51b3\u673a\u5236\u53ea\u80fd\u4f5c\u4e3a\u515c\u5e95，\u771f\u6b63\u7684\u6570\u636e\u4e00\u81f4\u6027，\u5fc5\u987b\u9760\u4e1a\u52a1\u5c42\u7684\u7248\u672c\u63a7\u5236\u3001\u81ea\u5b9a\u4e49\u5408\u5e76\u7b56\u7565\u4ee5\u53ca\u4e25\u8c28\u7684\u751f\u547d\u5468\u671f\u7ba1\u7406\u6765\u7ef4\u62a4\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u4e0a\u5468\u5728\u505a\u4e00\u4e2a\u591a\u7aef\u534f\u540c\u7684\u8bb0\u8d26\u672c\u5e94\u7528，\u9047\u5230\u4e86\u4e00\u4e2a\u6781\u5ea6\u6293\u72c2\u7684\u5ba2\u8bc9\u3002\u7528\u6237\u7528\u624b\u673a\u8bb0\u4e86\u4e00\u7b14\u201c\u9910\u996e 100 \u5143\u201d，\u7136\u540e\u7528\u5e73\u677f\u628a\u8fd9\u7b14\u8d26\u6539\u6210\u4e86\u201c\u9910\u996e 150 \u5143\u201d\u3002\u7ed3\u679c\u4e24\u53f0\u8bbe\u5907\u8054\u7f51\u4e00\u540c\u6b65，\u624b\u673a\u4e0a\u90a3\u6761\u8bb0\u5f55\u53c8\u53d8\u56de\u4e86 100 \u5143，\u4e24\u8fb9\u7684\u8d26\u5355\u6b7b\u6d3b\u5bf9\u4e0d\u4e0a\u3002\u8fd9\u4e0d\u4ec5\u662f\u4f53\u9a8c\u707e\u96be，\u66f4\u662f\u903b\u8f91\u6f0f\u6d1e\u3002\u9ed8\u8ba4\u540c\u6b65\u7b56\u7565\u7684\u5e95\u5c42\u7384\u673a
\n\u9e3f\u8499\u7684\u5206\u5e03\u5f0f\u6570\u636e\u7ba1\u7406（KVStore）\u5e95\u5c42\u7528\u7684\u662f\u57fa\u4e8e\u65f6\u95f4\u6233\u7684\u201c\u6700\u540e\u5199\u5165\u8005\u80dc\u51fa（Las<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[12392,280],"topic":[],"class_list":["post-123197","post","type-post","status-publish","format-standard","hentry","category-server","tag-12392","tag-harmonyos"],"yoast_head":"\n