myButton.frame不可用爲什麼？

Question

我有一個按鈕，當我嘗試寫myButton。那麼如果我單擊esc按鈕沒有選項或任何智能結果。

謝謝

Answer 1

你的代碼是這樣嗎？

@interface myViewController : UIViewController { 
    UIBUtton *myButton; 
} 
@property (nonatomic, retain) IBOutlet UIButton *myButton 

@end; 

@implementation myViewController 

@synthesize myButton; 

- (void) someMethod 
{ 
    //Use myButton Here? 
    CGRect r = myButton.frame; 
} 

@end 

或本：

@interface myViewController : UIViewController { 
    // No need to declare myButton for iPhone or Mac 64-bit 
} 
@property (nonatomic, retain) IBOutlet UIButton *myButton 

@end; 

@implementation myViewController 

@synthesize myButton; 

- (void) someMethod 
{ 
    //Use myButton Here? 
    CGRect r = self.myButton.frame; 
} 

@end 

，如果是後者，myButton不是私有變量 - 僅屬性。