{"id":3956,"date":"2016-06-14T14:41:05","date_gmt":"2016-06-14T06:41:05","guid":{"rendered":"http:\/\/blog.qdac.cc\/?p=3956"},"modified":"2016-06-14T14:43:43","modified_gmt":"2016-06-14T06:43:43","slug":"fmx-%e5%9c%a8%e5%ba%94%e7%94%a8%e5%88%87%e6%8d%a2%e5%88%b0%e5%90%8e%e5%8f%b0%e6%97%b6%e4%bf%9d%e5%ad%98%e5%bd%93%e5%89%8d%e7%8a%b6%e6%80%81","status":"publish","type":"post","link":"https:\/\/blog.qdac.cc\/?p=3956","title":{"rendered":"[FMX] \u5728\u5e94\u7528\u5207\u6362\u5230\u540e\u53f0\u65f6\u4fdd\u5b58\u5f53\u524d\u72b6\u6001"},"content":{"rendered":"<p>\u5728\u79fb\u52a8\u5e94\u7528\u5f00\u53d1\u4e2d\uff0c\u4e00\u4e2a\u7a0b\u5e8f\u88ab\u5207\u5230\u540e\u53f0\uff0c\u6709\u7684\u65f6\u5019\uff0c\u6211\u4eec\u9700\u8981\u4fdd\u5b58\u4e0b\u72b6\u6001\uff0c\u7136\u540e\u4ee5\u4fbf\u5728\u7a0b\u5e8f\u88ab\u64cd\u4f5c\u7cfb\u7edf\u5728\u540e\u53f0\u4e2d\u6b62\u65f6\uff0c\u518d\u6b21\u542f\u52a8\u80fd\u591f\u6062\u590d\u539f\u6765\u7684\u72b6\u6001\uff08\u6bd4\u5982 iOS \u4e2d\uff0c\u4f60\u7684\u7a0b\u5e8f\u88ab\u5207\u540e\u53f0\u540e\uff0c\u5f88\u53ef\u80fd\u7531\u4e8e\u67d0\u4e9b\u539f\u56e0\uff08\u5982\u5185\u5b58\u4e0d\u8db3\uff09\u88ab\u64cd\u4f5c\u7cfb\u7edf\u4e2d\u6b62\uff09\u3002\u8981\u5b9e\u73b0\u8fd9\u4e2a\u6548\u679c\uff0c\u60a8\u53ef\u4ee5\uff1a<\/p>\n<p>1\u3001\u5728\u4e3b\u7a97\u4f53\u7684 OnCreate \u4e8b\u4ef6\u4e2d\uff0c\u68c0\u67e5 SaveState \u7684 Stream \u7684\u5927\u5c0f\uff0c\u5982\u679c\u4e0d\u4e3a0\uff0c\u4ee3\u8868\u4f60\u5728\u4e0a\u6b21\u5207\u6362\u5230\u540e\u53f0\u65f6\uff0c\u4fdd\u5b58\u4e86\u72b6\u6001\u4fe1\u606f\uff0c\u4f60\u9700\u8981\u505a\u7684\u5c31\u662f\u4ece\u4e2d\u6062\u590d\u72b6\u6001\u6570\u636e\u3002\u7136\u540e\u518d\u6e05\u9664\u6389\u4fdd\u5b58\u7684\u72b6\u6001\u6587\u4ef6\uff0c\u4ee5\u907f\u514d\u4e0b\u6b21\u542f\u52a8\u65f6\u7531\u4e8e\u72b6\u6001\u6587\u4ef6\u8fd8\u5b58\u5728\uff0c\u4ece\u800c\u6062\u590d\u6210\u4e86\u9519\u8bef\u7684\u72b6\u6001\u3002<\/p>\n<p>\u4e00\u4e2a\u7b80\u5355\u7684\u793a\u4f8b\u51fd\u6570\uff0c\u8fd9\u91cc\u4f7f\u7528\u672a\u52a0\u5bc6\u7684 QJSON \u6765\u4fdd\u5b58\u6570\u636e\u72b6\u6001\uff1a<\/p>\n<pre class=\"lang:delphi decode:true\">procedure RestoreStates;\r\n  var\r\n    AJson: TQJson;\r\n    AService: IFMXSaveStateService;\r\n  begin\r\n    SaveState.StoragePath := System.IOUtils.TPath.GetDocumentsPath +\r\n      System.IOUtils.TPath.DirectorySeparatorChar;\/\/\u6307\u5b9a\u72b6\u6001\u6587\u4ef6\u4fdd\u5b58\u76ee\u5f55\r\n    SaveState.Name := 'frmMain.States';\r\n    if SaveState.Stream.Size &gt; 0 then\r\n    begin\r\n      AJson := TQJson.Create;\r\n      try\r\n        AJson.LoadFromStream(SaveState.Stream);\r\n        ...\/\/\u6dfb\u52a0\u6062\u590d\u4ee3\u7801\r\n      finally\r\n        FreeAndNil(AJson);\r\n        if TPlatformServices.Current.SupportsPlatformService\r\n          (IFMXSaveStateService, AService) then \/\/ \u5220\u9664\u4e34\u65f6\u6587\u4ef6\r\n          AService.SetBlock(SaveState.Name, nil);\r\n      end;\r\n    end;\r\n  end;<\/pre>\n<p>2\u3001\u5728\u7a97\u4f53\u7684 OnSaveState \u4e8b\u4ef6\u4e2d\uff0c\u4fdd\u5b58\u5f53\u524d\u5e94\u7528\u7684\u72b6\u6001\uff1a<\/p>\n<pre class=\"lang:delphi decode:true \">procedure TfrmMain.FormSaveState(Sender: TObject);\r\nvar\r\n  AJson: TQJson;\r\nbegin\r\n  SaveState.Stream.Size := 0;\r\n  if not ReadOnly then\r\n  begin\r\n    AJson := TQJson.Create;\r\n    try\r\n      ... \u6dfb\u52a0\u4fdd\u5b58\u72b6\u6001\u7684\u4ee3\u7801\r\n      AJson.SaveToStream(SaveState.Stream);\r\n    finally\r\n      FreeAndNil(AJson);\r\n    end;\r\n  end;\r\nend;<\/pre>\n<p>\u597d\u4e86\uff0c\u8fd9\u6837\u5728\u7a0b\u5e8f\u542f\u52a8\u65f6\uff0c\u5c31\u4f1a\u6062\u590d\u5e94\u7528\u7684\u72b6\u6001\uff0c\u4e0d\u6015\u5e94\u7528\u88ab\u540e\u53f0\u6e05\u7406\u6389\u4e86\u3002\u5b9e\u9645\u4e0a\uff0c\u6211\u4eec\u4e5f\u53ef\u4ee5\u4e0d\u4f7f\u7528\u5b83\u7684SaveState \u63a5\u53e3\uff0c\u81ea\u5df1\u4fdd\u5b58\u6587\u4ef6\u5e76\u6062\u590d\u5c31\u597d\u3002\u6ce8\u610f\u8fd9\u4e2a\u6587\u4ef6\u5982\u679c\u653e\u5230\u4e86\u5176\u5b83\u7a0b\u5e8f\u53ef\u89c1\u7684\u76ee\u5f55\u4e0b\u65f6\uff0c\u5e94\u8be5\u52a0\u5bc6\u4ee5\u907f\u514d\u9690\u79c1\u6cc4\u9732\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728\u79fb\u52a8\u5e94\u7528\u5f00\u53d1\u4e2d\uff0c\u4e00\u4e2a\u7a0b\u5e8f\u88ab\u5207\u5230\u540e\u53f0\uff0c\u6709 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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