{"id":4336,"date":"2016-12-07T21:29:30","date_gmt":"2016-12-07T13:29:30","guid":{"rendered":"http:\/\/blog.qdac.cc\/?p=4336"},"modified":"2016-12-07T21:29:30","modified_gmt":"2016-12-07T13:29:30","slug":"%e6%95%99%e7%a8%8b%e5%a6%82%e6%9e%9c%e5%9c%a8-delphi-%e4%b8%ad%e9%87%8d%e8%bd%bd%e7%88%b6%e7%b1%bb%e9%87%8d%e8%bd%bd%e7%9a%84%e6%8e%a5%e5%8f%a3%e4%b8%ad%e7%9a%84%e6%9f%90%e4%b8%aa%e9%9d%9e%e8%99%9a","status":"publish","type":"post","link":"https:\/\/blog.qdac.cc\/?p=4336","title":{"rendered":"[\u6559\u7a0b]\u5982\u679c\u5728 Delphi \u4e2d\u91cd\u8f7d\u7236\u7c7b\u91cd\u8f7d\u7684\u63a5\u53e3\u4e2d\u7684\u67d0\u4e2a\u975e\u865a\u51fd\u6570"},"content":{"rendered":"<p>\u597d\u5427\uff0c\u8fd9\u4e2a\u95ee\u9898\u53ef\u80fd\u591f\u65e0\u804a\uff0c\u53cd\u6b63\u7236\u7c7b\u5df2\u7ecf\u5b9e\u73b0\u4e86\uff0c\u4e3a\u5565\u4e0d\u7528\u7236\u7c7b\u7684\u4e00\u7c7b\u7684\u95ee\u9898\u5c31\u4e0d\u8981\u95ee\u4e86\uff0c\u53cd\u6b63\u8fd9\u4e2a\u4e8b\u4e5f\u6ca1\u5565\u53ef\u4e89\u8bba\u7684\uff0c\u53ea\u662f\u544a\u8bc9\u5927\u5bb6\u4e00\u79cd\u5173\u4e8e\u63a5\u53e3\u7684\u5199\u6cd5\u3002<\/p>\n<p>\u6211\u4eec\u90fd\u77e5\u9053 Delphi \u4e2d\u63a5\u53e3\u5bf9\u8c61\u4e00\u822c\u4ece TInterfacedObject \u7ee7\u627f\uff0c\u4f46\u00a0QueryInterface \u51fd\u6570\u5374\u4e0d\u662f\u865a\u51fd\u6570\uff0c\u6240\u4ee5\u60f3\u91cd\u8f7d\u662f\u65e0\u95e8\u7684\uff0c\u4e3a\u6b64 QPlugins \u81ea\u5df1\u91cd\u65b0\u5b9e\u73b0\u4e86 TQInterfacedObject \u6765\u66ff\u4ee3\u5b83\u3002\u4f46\u5b9e\u9645\u4e0a\u8fd8\u6709\u4e00\u79cd\u529e\u6cd5\uff0c\u53ef\u4ee5\u8ba9\u4f60\u91cd\u8f7d\u5b83\uff0c\u90a3\u5c31\u662f\u8ba9\u4f60\u7684\u5b50\u7c7b\u91cd\u65b0\u7ee7\u627f\u4e0b\u7236\u7c7b\u5df2\u7ecf\u5b9e\u73b0\u7684\u63a5\u53e3\uff08\u5982IInterface\uff09\uff0c\u5e76\u4e14\u5b9e\u73b0\u8981\u91cd\u8f7d\u7684\u51fd\u6570\u3002\u793a\u4f8b\u5982\u4e0b\uff1a<\/p>\n<pre class=\"lang:delphi decode:true \">type\r\n  IObject = interface\r\n    ['{ADB32A65-BACF-462C-8F76-E589A6CE27E9}']\r\n    function TypeName: String;\r\n  end;\r\n\r\n  TTestObject = class(TInterfacedObject, IObject,IInterface)\r\n    function TypeName: String;\r\n  public\r\n    function QueryInterface(const IID: TGUID; out Obj): HResult; stdcall;\r\n  end;\r\n\r\nprocedure TForm2.Button1Click(Sender: TObject);\r\nvar\r\n  AObj:IInterface;\r\nbegin\r\nAObj:=TTestObject.Create;\r\nShowMessage((AObj as IObject).TypeName);\r\nend;\r\n\r\n{ TTestObject }\r\n\r\nfunction TTestObject.QueryInterface(const IID: TGUID; out Obj): HResult;\r\nbegin\r\nif IID=IObject then\r\n  begin\r\n  IObject(Obj):=Self;\r\n  Result:=0;\r\n  end\r\nelse\r\n  Result:=QueryInterface(IID,Obj);\r\nend;\r\n\r\nfunction TTestObject.TypeName: String;\r\nbegin\r\n  Result := ClassName;\r\nend;<\/pre>\n<p>\u5982\u679c\u4f60\u5728 TTestObject.QueryInterface \u4e2d\u8bbe\u7f6e\u65ad\u70b9\uff0c\u4f60\u4f1a\u53d1\u73b0\u7adf\u7136\u80fd\u65ad\u65ad\u65ad\u65ad\u4e0b\u6765\u4e86\uff0c\u8bc1\u660e\u91cd\u8f7d\u662f\u751f\u6548\u7684\u3002\u800c\u4f60\u6ca1\u6709\u91cd\u8f7d\u7684\u63a5\u53e3\u51fd\u6570\u4f9d\u7136\u4f7f\u7528\u7236\u7c7b\u7684\u5b9e\u73b0\uff0c\u800c\u8fd9\u6b63\u662f\u6211\u4eec\u8981\u7684\u4e1c\u897f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u597d\u5427\uff0c\u8fd9\u4e2a\u95ee\u9898\u53ef\u80fd\u591f\u65e0\u804a\uff0c\u53cd\u6b63\u7236\u7c7b\u5df2\u7ecf\u5b9e [&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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