Objective C判断设备当前的方向

Objective C判断设备当前的方向

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;  
    }