Form1内有Label1,Button1
Form2内有Label1,Button1
Form3内有Label1,Button1--------------------------------------------------
program Project1;uses
Forms,
Unit1 in 'Unit1.pas' {Form1},
Unit2 in 'Unit2.pas' {Form2},
Unit3 in 'Unit3.pas' {Form3};{$R *.res}begin
Application.Initialize;
Application.CreateForm(TForm1, Form1);
Application.Run;
end.
-----------------------------------------------
//TForm1
procedure TForm1.Button1Click(Sender: TObject);
var
form2:tform2;
begin
form2:=tform2.Create(application);
form2.ShowModal;
form2.Free;end;
-----------------------------------------------
//TForm2
implementationuses Unit3;
var
form3:tform3;
{$R *.dfm}procedure TForm2.FormClose(Sender: TObject; var Action: TCloseAction);
begin
form3.free;
end;procedure TForm2.FormCreate(Sender: TObject);
begin
form3:=tform3.Create(application);
end;procedure TForm2.Button1Click(Sender: TObject);
begin
form3.ShowModal;
end;end.
--------------------------------------------------------
//TForm3
implementationuses Unit2;var
form2:tform2;{$R *.dfm}procedure TForm3.Button1Click(Sender: TObject);
begin label1.Caption:=form2.Caption;
end;end.我现在一执行就内存出错,为什么我的Form3不能访问Form2的内容??
Form2不是已经创建并申请了内存了吗?
问题出在哪里了,DX们帮帮我
Form2内有Label1,Button1
Form3内有Label1,Button1--------------------------------------------------
program Project1;uses
Forms,
Unit1 in 'Unit1.pas' {Form1},
Unit2 in 'Unit2.pas' {Form2},
Unit3 in 'Unit3.pas' {Form3};{$R *.res}begin
Application.Initialize;
Application.CreateForm(TForm1, Form1);
Application.Run;
end.
-----------------------------------------------
//TForm1
procedure TForm1.Button1Click(Sender: TObject);
var
form2:tform2;
begin
form2:=tform2.Create(application);
form2.ShowModal;
form2.Free;end;
-----------------------------------------------
//TForm2
implementationuses Unit3;
var
form3:tform3;
{$R *.dfm}procedure TForm2.FormClose(Sender: TObject; var Action: TCloseAction);
begin
form3.free;
end;procedure TForm2.FormCreate(Sender: TObject);
begin
form3:=tform3.Create(application);
end;procedure TForm2.Button1Click(Sender: TObject);
begin
form3.ShowModal;
end;end.
--------------------------------------------------------
//TForm3
implementationuses Unit2;var
form2:tform2;{$R *.dfm}procedure TForm3.Button1Click(Sender: TObject);
begin label1.Caption:=form2.Caption;
end;end.我现在一执行就内存出错,为什么我的Form3不能访问Form2的内容??
Form2不是已经创建并申请了内存了吗?
问题出在哪里了,DX们帮帮我
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试试
procedure TForm3.Button1Click(Sender: TObject);
begin label1.Caption:=form2.label1.Caption;
end;end.还是出错
procedure TForm1.Button1Click(Sender: TObject);
var
form2:tform2;
begin
form2:=tform2.Create(application);
form2.ShowModal;
form2.Free;\\这里把窗体释放了啊???这个程序看的人复杂……
form2:=tform2.Create(application);
form2.ShowModal;//我关闭了Form2才执行下一句吧
form2.Free;
procedure TForm1.Button1Click(Sender: TObject);
var
form2:tform2;
begin
form2:=tform2.Create(application);
form2.ShowModal;
form2.Free;将上面的改成://TForm1
procedure TForm1.Button1Click(Sender: TObject);
begin
form2.ShowModal;
end;应该就可以的。
begin label1.Caption:=form2.Caption;
这里有问题;因为这个时候FORM2还没创建呢,所以不能用FORM2的CAPTION;
end;end.
begin
Application.Initialize;
Application.CreateForm(TForm1, Form1);
Application.Run;
end.我是在按Form1.Button1的时候才创建的。
begin
form3:=tform3.Create(application);
看看这里,你的FORM2创建以前就创建了FORM3;FORM3不关闭掉;FORM2是不会创建的;
把这里的代码写到FROM2。ONSHOW里吧;就没问题了;
end;
begin
form3:=tform3.Create(application);
看看这里,你的FORM2创建以前就创建了FORM3;FORM3不关闭掉;FORM2是不会创建的;
把这里的代码写到FROM2。ONSHOW里吧;就没问题了;
end;
----------------------------------------------------------
还是有问题
label1上面显示form2.label1= Inaccessible Value什么问题?
[email protected]
Application.CreateForm(TForm2, Form2);
Application.CreateForm(TForm3, Form3);晕倒,我启动工程,一次性创建200多个Form,不得等上半分钟啊