{"id":878,"date":"2023-12-25T20:19:34","date_gmt":"2023-12-25T12:19:34","guid":{"rendered":"http:\/\/gjweb.top\/?p=878"},"modified":"2023-12-25T20:19:37","modified_gmt":"2023-12-25T12:19:37","slug":"harmonyos-app%e4%b8%a4%e6%ac%a1%e8%bf%94%e5%9b%9e%e9%80%80%e5%87%ba","status":"publish","type":"post","link":"https:\/\/gjweb.top\/?p=878","title":{"rendered":"HarmonyOS APP\u4e24\u6b21\u8fd4\u56de\u9000\u51fa"},"content":{"rendered":"\n<p>\u601d\u8def\uff1a\u76d1\u542c\u9875\u9762\u751f\u547d\u5468\u671f <code>onBackPress<\/code> \u5f53\u70b9\u51fb\u8fd4\u56de\u65f6\u4f1a\u88ab\u89e6\u53d1\uff0c\u8be5\u51fd\u6570\u9700\u8981\u624b\u52a8\u8fd4\u56de\u4e00\u4e2a boolear \u503c\uff0c\u4e3a true \u65f6APP\u4e0d\u4f1a\u9000\u51fa<\/p>\n\n\n\n<p>\u5b8c\u6574\u793a\u4f8b\u4ee3\u7801<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>import app from '@system.app';\nimport promptAction from '@ohos.promptAction'\n\n@Entry\n@Component\nstruct Index {\n  \/\/ \u8bb0\u5f55\u4e0a\u4e00\u6b21\u70b9\u51fb\u65f6\u95f4\n  private pretime: number = new Date().getTime();\n  onBackPress() {\n    let currentTime = new Date().getTime();\n    let flag = currentTime - this.pretime;\n    if (flag &gt; 2000) {\n      promptAction.showToast({\n        message: \"\u518d\u6309\u4e00\u6b21\u9000\u51fa\u5e94\u7528\",\n        duration:3000\n      })\n      \/\/\u4e24\u6b21\u70b9\u51fb\u65f6\u95f4\u592a\u957f\u4e0d\u505a\u5904\u7406\n      this.pretime = currentTime;\n      return true;\n    } else {\n      app.terminate(); \/\/ 2\u79d2\u5185\u70b9\u51fb\uff0c\u9000\u51fa\u5f53\u524dAbility\u3002\n    }\n    return false;\n  }\n\n  build() {\n    Row(){\n        Text(\"hello world\")\n    }\n  }\n}<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u601d\u8def\uff1a\u76d1\u542c\u9875\u9762\u751f\u547d\u5468\u671f onBackPress \u5f53\u70b9\u51fb\u8fd4\u56de\u65f6\u4f1a\u88ab\u89e6\u53d1\uff0c\u8be5\u51fd\u6570\u9700\u8981\u624b\u52a8\u8fd4\u56de\u4e00\u4e2a boolear  [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[70],"tags":[],"class_list":["post-878","post","type-post","status-publish","format-standard","hentry","category-harmonyos4-0"],"_links":{"self":[{"href":"https:\/\/gjweb.top\/index.php?rest_route=\/wp\/v2\/posts\/878","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gjweb.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/gjweb.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/gjweb.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/gjweb.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=878"}],"version-history":[{"count":1,"href":"https:\/\/gjweb.top\/index.php?rest_route=\/wp\/v2\/posts\/878\/revisions"}],"predecessor-version":[{"id":879,"href":"https:\/\/gjweb.top\/index.php?rest_route=\/wp\/v2\/posts\/878\/revisions\/879"}],"wp:attachment":[{"href":"https:\/\/gjweb.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=878"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gjweb.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=878"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gjweb.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=878"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}