無法強制設備更改UIOrientation

我有一個模塊化添加圖像選擇器控制器的vc，然後在選擇圖片時返回相同的vc。在通過PickerController獲取圖像後，我將圖像添加到屏幕上，並且如果圖像是風景，我希望設備自動切換到風景，如果圖像是肖像，則需要人像。無法強制設備更改UIOrientation

我已經嘗試過失敗這兩種方法來強制設備進入景觀

1. 

[[UIApplication sharedApplication] setStatusBarOrientation:UIInterfaceOrientationLandscapeLeft]; 

2. 
[UIViewController attemptRotationToDeviceOrientation]; 

-(NSUInteger)supportedInterfaceOrientations 
{ 

if (!isPortrait) //isPortrait is false when pic is landscape 
    return UIInterfaceOrientationMaskLandscape; 

}

另外，我想知道如果這是最好的只是實例化圖像的單獨的VC。我避開它迄今在此之後question

來源

2013-04-20 Mahir

我的猜測是，你必須調用[[UIApplication sharedApplication] setStatusBarOrientation:的視圖控制器的viewWillAppear:方法呈現UIImagePickerController內。

對於您需要了解的第一圖像方向，你可以做這樣的事情：

- (BOOL)shouldAutorotate { 
    return NO; 
} 

- (void) viewDidAppear:(BOOL)animated { 
    [super viewDidAppear:animated]; 

    if(myOrientation>0) 
     [UIApplication sharedApplication].statusBarOrientation = myOrientation; 
} 

- (void)presentPicker { 
    UIImagePickerController* imgPicker = [[UIImagePickerController alloc] init]; 
    imgPicker.delegate = self; 
    [self presentViewController:imgPicker animated:YES completion:nil]; 
} 

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info { 
    UIImage* image = [info objectForKey:@"UIImagePickerControllerOriginalImage"]; 

    if(image.size.width>image.size.height) 
     myOrientation = UIInterfaceOrientationLandscapeLeft; 
    else 
     myOrientation = UIInterfaceOrientationPortrait; 

    [picker dismissViewControllerAnimated:YES completion:nil]; 
}

此外，不要忘記設置初始和支持的接口方向的plist中（第一支持的方向必須等於初始方向）

來源

2013-04-20 09:47:44 Odrakir

無法強制設備更改UIOrientation

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