iPhone判斷設備當前的方向

UIDevice *device = [UIDevice currentDevice];
switch (device.orientation;) { 
        case UIDeviceOrientationFaceUp: 
            NSLog(@"螢幕朝上平躺"); 
            break;


    case UIDeviceOrientationFaceDown: 
        NSLog(@"螢幕朝下平躺"); 
        break; 

    //系統無法判斷目前Device的方向，有可能是斜置  
    case UIDeviceOrientationUnknown: 
        NSLog(@"未知方向"); 
        break; 

    case UIDeviceOrientationLandscapeLeft: 
        NSLog(@"螢幕向左橫置");
        //imgView.transform = CGAffineTransformMakeRotation((CGFloat)(-90 * M_PI / 180.0));
        break; 

    case UIDeviceOrientationLandscapeRight: 
        NSLog(@"螢幕向右橫置"); 
        //imgView.transform = CGAffineTransformMakeRotation((CGFloat)(90 * M_PI / 180.0));
        break; 

    case UIDeviceOrientationPortrait: 
        NSLog(@"螢幕直立"); 
        break; 

    case UIDeviceOrientationPortraitUpsideDown: 
        NSLog(@"螢幕直立，上下顛倒"); 
        break; 

    default: 
        NSLog(@"無法辨識"); 
        break; 
}</pre>