我在从未叫过Destroy()
的情况下奔跑。
unit Unit2;
interface
type
// Interface
ITest = Interface(IInterface)
function IsTrue() : Boolean;
end;
TmyClass = class(TInterfacedObject,ITest)
public
// Interface implementation
function IsTrue() : Boolean;
constructor Create();
destructor Destroy(); override;
end;
implementation
constructor TmyClass.Create();
begin
inherited Create();
end;
destructor TmyClass.Destroy();
begin
inherited Destroy();
end;
published
// Property
property IsItTrue: Boolean read IsTrue;
end.
unit Unit1;
interface
uses
Winapi.Windows,Winapi.Messages,System.SysUtils,System.Variants,System.Classes,Vcl.Graphics,Vcl.Controls,Vcl.Forms,Vcl.Dialogs,Vcl.StdCtrls,unit2;
type
TForm1 = class(TForm)
Button1: TButton;
procedure FormCreate(Sender: TObject);
procedure Button1Click(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;
var
Form1: TForm1;
fMyClass: TmyClass;
implementation
{$R *.dfm}
procedure TForm1.Button1Click(Sender: TObject);
begin
fMyClass.Free; // if refcount = 0 this works,if refcount <> 0 pointer error.
//or
fMyClass := Nil; // no error but Destroy wil not be executed
Close();
end;
procedure TForm1.FormCreate(Sender: TObject);
begin
fMyClass := TMyClass.Create();
end;
end.
读取this article时,只有一个构造函数,而没有实现析构函数。
有什么特殊原因吗?
我是否应该通过实现myClass
节来释放(如果需要)在finalization
中定义的所有其他对象?