UILabel风景取向

Question

我试图改变风景orient的UIlabels坐标，所以我做到了。问题是它不起作用。我究竟做错了什么？

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation { 
    return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown); 
if (interfaceOrientation != UIInterfaceOrientationLandscapeLeft) { 
    label.frame = CGRectMake(377, 15, 42, 21); 
    } 
} 

Answer 1

看看你的代码密切：

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation { 
    // this line returns immediately 
    return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown); 

    // and this code never ever hits... 
    if (interfaceOrientation != UIInterfaceOrientationLandscapeLeft) { 
     label.frame = CGRectMake(377, 15, 42, 21); 
    } 

    // nor does it return anything (it's supposed to return a BOOL) 
} 

尽量不要做这样的：

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation { 
    if (interfaceOrientation != UIInterfaceOrientationLandscapeLeft) { 
     if(label) 
     { 
      label.frame = CGRectMake(377, 15, 42, 21); 
     } else { 
      NSLog(@"label is nil; why is that?"); 
     } 
    } 
    // return a BOOL to tell the view controller to rotate in all cases 
    return YES; 
} 

我没有测试的正确性验证码，并从我可以告诉发生的唯一情况是，标签框架将重置为中的每个案例除两种景观模式之一。