這個自定類不起作用? |
答題得分者是:TWY
|
mp394681143
一般會員 發表:64 回覆:40 積分:20 註冊:2009-10-11 發送簡訊給我 |
老是報屬性域錯誤?屬性無法讀取?
[code delphi] type TForm1 = class(TForm) Button1: TButton; procedure Button1Click(Sender: TObject); private { Private declarations } public { Public declarations } end; TnewEdit1 = class(Tedit) procedure ShowNickName ; property nickName:string read fnickName write setNickName; private { Private declarations } fnickName:string; procedure setNickName(const value:string); public { Public declarations } end; var Form1: TForm1; implementation {$R *.dfm} procedure Tnewedit1.setNickName(const value:string); begin FNickName:= value; showmessage(nickName); end; procedure TForm1.Button1Click(Sender: TObject); var newEdit:TNewEdit1; begin newEdit := TNewEdit.create(nil); newEdit.setNickName; newEdit1.free; end; [/code] |
TWY
高階會員 發表:2 回覆:133 積分:152 註冊:2009-09-02 發送簡訊給我 |
首先呢,你的 Code 有些地方不通,例如定義了 TNewEdit1 類別,但你卻用 TNewEdit.Create....
我幫你稍作調整並修正,以下 Code 可以正常編譯執行,提供參考 [code delphi] unit Unit1; interface uses Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms, Dialogs, StdCtrls; type TForm1 = class(TForm) Button1: TButton; procedure Button1Click(Sender: TObject); private { Private declarations } public { Public declarations } end; TnewEdit1 = class(TEdit) private { Private declarations } fnickName:string; public { Public declarations } property nickName:string read fnickName write fnickName; procedure setNickName(value:string); end; var Form1: TForm1; implementation {$R *.dfm} { TnewEdit1 } procedure TnewEdit1.setNickName(value: string); begin fnickName := value; ShowMessage(fnickName); end; procedure TForm1.Button1Click(Sender: TObject); var newEdit:TNewEdit1; begin newEdit := TNewEdit1.create(nil); newEdit.setNickName('Nick'); newEdit.free; end; end. [/code] |
mp394681143
一般會員 發表:64 回覆:40 積分:20 註冊:2009-10-11 發送簡訊給我 |
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