类的只读属性形同虚设?
代码如下,只读属性的值还是被修改了!算是“漏洞”吧?
- Delphi(Pascal) code
type TForm1 = class(TForm) Button1: TButton; procedure FormCreate(Sender: TObject); procedure Button1Click(Sender: TObject); private { Private declarations } Fa: Integer; public { Public declarations } property a: Integer read Fa; end;var Form1: TForm1;implementation{$R *.dfm}procedure TForm1.Button1Click(Sender: TObject);begin showmessage(IntToStr(a))end;procedure TForm1.FormCreate(Sender: TObject);begin PInteger(@a)^ := 123;{通过指针方式修改只读属性的值}end;[解决办法]
修改只读属性的方法就是通过指针
[解决办法]
property a: Integer read Geta; 用函数就是另一回事了