IOS指針問題

Question

嗨，大家好有一些問題的指針，這是我的代碼

NSArray *buttons = [NSArray arrayWithObjects: self.btn1, self.btn2, self.btn3,nil]; 

for(UIButton *btn in buttons){ 

    NSLog(@"%f, %f, %@", btn.bounds.size.width, btn.frame.size.height, btn.titleLabel.text); 
} 

的出來說就是"0.00000, 0.00000, button1" 任何想法怎麼回事???錯誤

Answer 1

重試，此代碼只需設置幀viewDidLoad:方法，像波紋管..

- (void)viewDidLoad 
{ 

    ///set frame which you want.. 

    self.btn1 = [[UIButton alloc]initWithFrame:CGRectMake(10, 10, 100, 44)]; 
    self.btn2 = [[UIButton alloc]initWithFrame:CGRectMake(10, 70, 100, 44)]; 
    self.btn3 = [[UIButton alloc]initWithFrame:CGRectMake(10, 120, 100, 44)]; 
}