iphone定向不工作

嗨，我有一个像这样的代码

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
if (self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]) {
    // Custom initialization

    username = [[UILabel alloc]initWithFrame:CGRectMake(53,115, 83, 21)];
    username.text = @"Username";
    [username setFont:[UIFont fontWithName:@"Arial" size:14]];

    password = [[UILabel alloc]initWithFrame:CGRectMake(53,188, 75, 21)];
    password.text = @"Password";
    [password setFont:[UIFont fontWithName:@"Arial" size:14]];


    txtusername = [[UITextField alloc]initWithFrame:CGRectMake(42, 144, 233, 31)];
    [txtusername setBorderStyle:UITextBorderStyleRoundedRect];
    [txtusername setPlaceholder:@"Username"];
    [txtusername setAutocorrectionType:UITextAutocorrectionTypeNo];
    txtusername.delegate = self;
    txtusername.returnKeyType = UIReturnKeyDone;

    txtpassword = [[UITextField alloc]initWithFrame:CGRectMake(42, 217, 233, 31)];
    [txtpassword setBorderStyle:UITextBorderStyleRoundedRect];
    [txtpassword setPlaceholder:@"Password"];
    [txtpassword setAutocorrectionType:UITextAutocorrectionTypeNo];
    txtpassword.delegate = self;
    txtpassword.returnKeyType = UIReturnKeyDone;

    loginbutton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
    [loginbutton setFrame:CGRectMake(110, 269, 124, 26)];
    [loginbutton setTitle:@"Login" forState:UIControlStateNormal];


}
return self;
}


- (void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation
{
UIInterfaceOrientation currentOrientation = [[UIDevice currentDevice]orientation];

switch (currentOrientation)
{
    case UIInterfaceOrientationLandscapeLeft:
    case UIInterfaceOrientationLandscapeRight:

        username.center = CGPointMake(157, 71);
        password.center = CGPointMake(157,144);
        txtusername.center = CGPointMake(146,100);
        txtpassword.center = CGPointMake(120,172);
        loginbutton.center = CGPointMake(214,225);
        break;


    case UIInterfaceOrientationPortrait:
    case UIInterfaceOrientationPortraitUpsideDown:
        username.bounds = CGRectMake(53, 115, 83, 21);
        //username.center = CGPointMake(53, 115);
        password.bounds = CGRectMake(53, 188, 75, 21);
        //password.center = CGPointMake(53,188);
        txtusername.center = CGPointMake(42,144);
        txtpassword.center = CGPointMake(42,217);
        loginbutton.center = CGPointMake(110,269);
        break;

}
}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
    // Return YES for supported orientations
    //return (interfaceOrientation == UIInterfaceOrientationPortrait);
    return YES;
}

现在的问题似乎是界面没有像现在这样定向，组件没有达到我给它们的坐标，当我左右旋转iPhone硬件时，它们没有达到这些坐标，当我的视图加载时，一切正常，但当我旋转视图时，我得到了这个错误。请帮帮我，伙计们

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感谢您

通过查看提供的代码示例，您似乎混淆了框架、边界和中心的概念

让我们看看用户名。当我们创建并添加标签时，我们得到frame={53115}、{83,21}、bounds={0,0}、{83,21}和center={94.5125.5}

因此，框架是标签在超级视图中的绝对位置。它位于x=53和y=115处。框架的第二部分是尺寸，所以我们的宽度是83，高度是21。边界以标签自身的坐标系表示。这就是为什么通常将位置设置为{0，0}。中心点是框架的中心。也就是{53+83/2,115+21/2}={94.5125.5}

要使用中心点将用户名标签移回其原始位置，您需要

username.center = CGPointMake(53 + username.frame.size.width/2, 115 + username.frame.size.height/2); 

也可以重新设置帧

username.frame = CGRectMake(53, 115, 83, 21);

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您是否尝试过检查从currentOrientation获得的价值？我以前在[[UIDevice currentDevice]方向]上遇到过错误，我发现最好使用[self interfaceOrientation]，假设self是UIViewController（或子类）。我已经替换了行IIinterfaceOrientation currentOrientation=[[UIDevice currentDevice]方向]；使用UIInterfaceOrientation currentOrientation=[self interfaceOrientation]；但是没用，还是没能做到…设置框架成功了谢谢Robert澄清了我的概念，