在Delphi中安全地使用Form来分发与其生命周期相关的接口对象,可以遵循以下步骤:
type
IFormLifecycle = interface
['{XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX}']
procedure OnCreate;
procedure OnDestroy;
procedure OnShow;
procedure OnHide;
end;
type
TMyForm = class(TForm, IFormLifecycle)
// ...
procedure OnCreate;
procedure OnDestroy;
procedure OnShow;
procedure OnHide;
end;
procedure TMyForm.OnCreate;
begin
// 处理创建时的操作
end;
procedure TMyForm.OnDestroy;
begin
// 处理销毁时的操作
end;
procedure TMyForm.OnShow;
begin
// 处理显示时的操作
end;
procedure TMyForm.OnHide;
begin
// 处理隐藏时的操作
end;
constructor TMyForm.Create(AOwner: TComponent);
begin
inherited;
// 注册接口
(Owner as IFormLifecycle).OnCreate;
end;
destructor TMyForm.Destroy;
begin
// 注销接口
(Owner as IFormLifecycle).OnDestroy;
inherited;
end;
var
Form: TMyForm;
begin
Form := TMyForm.Create(Self);
try
// 分发接口
(Form.Owner as IFormLifecycle).OnShow;
except
Form.Free;
raise;
end;
end;
通过以上步骤,可以在Delphi中安全地使用Form来分发与其生命周期相关的接口对象。
领取专属 10元无门槛券
手把手带您无忧上云