在UIImagePickerController取消按鈕不顯示？

Question

這裏我使用下面的代碼。如果有人知道這個問題，請幫助我。 ，我也試過下面的網址，但它不工作。請幫我

iOS7 UIImagePickerController cancel button disappear UIImagePickerController inside UIPopoverController doesn't show Cancel button on iOS7

UIImagePickerController *picker = [[UIImagePickerController alloc] init]; 
picker.delegate = self; 
picker.allowsEditing = YES; 
picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary; 
[self presentViewController:picker animated:YES completion:NULL]; 
picker.navigationBar.tintColor = [UIColor redColor]; 
picker.navigationBar.barStyle = UIBarStyleBlackOpaque; 
picker.navigationBar.topItem.rightBarButtonItem.tintColor = [UIColor blackColor]; 

我的問題：

我的所需物品：

Answer 1

變化的UIImagePickerController navigationBar.tintColor 試試這個代碼：

UINavigationBar *bar = [self.navigationController navigationBar]; 
    [bar setTintColor:[UIColor blueColor]]; 

Answer 2

試試這個代碼：

UIImagePickerController *imagePickerController = [[UIImagePickerController alloc] init]; 
imagePickerController.sourceType = UIImagePickerControllerSourceTypePhotoLibrary; 
imagePickerController.delegate = self; 
[self presentViewController:imagePickerController animated:YES completion:nil]; 

並添加委託方法：- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info 
{ 
    UIImage *image = [info valueForKey:UIImagePickerControllerOriginalImage]; 
    [picker dismissViewControllerAnimated:YES completion:^{ 
    }]; 

    self.img = image; 
    [self.iconBtn setBackgroundImage:image forState:UIControlStateNormal]; 
} 

Answer 3

UIImagePickerController *imgPicker=[[UIImagePickerController alloc]init];  
imgPicker.delegate = self; 
imgPicker.navigationBar.barStyle = UIBarStyleBlackOpaque; 
UIImagePickerControllerSourceType sourceType = UIImagePickerControllerSourceTypePhotoLibrary; 
imgPicker.allowsEditing = NO; 

if([UIImagePickerController isSourceTypeAvailable: sourceType]) 
{ 
    imgPicker.sourceType=sourceType; 
    [self presentViewController:imgPicker animated:YES completion:NULL]; 
} 

Answer 4

我想你還沒有嵌入的viewController到導航控制器

請做到這一點並嘗試下面的代碼：（Objectiv e - c）

-(void)viewDidLoad 
{ 
    [super viewDidLoad]; 

    UIImagePickerController *picker = [[UIImagePickerController alloc] init]; 
    picker.delegate = self; 
    UIImagePickerController *imagePickerController = [[UIImagePickerController alloc] init]; 
    imagePickerController.sourceType = UIImagePickerControllerSourceTypePhotoLibrary; 
    imagePickerController.delegate = self; 
    [self presentViewController:imagePickerController animated:YES completion:nil]; 
}  

-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info 
    { 
     UIImage *image = [info valueForKey:UIImagePickerControllerOriginalImage]; 
     [picker dismissViewControllerAnimated:YES completion:^{ 
     }]; 

    UIImageView *imageview=[[UIImageView alloc]initWithFrame:CGRectMake(0, 0, 100, 300)]; 
    imageview.image=image; 
} 

Answer 5

我使用了與您發佈的代碼相同的代碼。它顯示「取消」按鈕。

UIImagePickerController *picker = [[UIImagePickerController alloc] init]; 
    picker.delegate = self; 
    picker.allowsEditing = YES; 
    picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary; 
    [self presentViewController:picker animated:YES completion:NULL]; 
    picker.navigationBar.tintColor = [UIColor redColor]; 
    picker.navigationBar.barStyle = UIBarStyleBlackOpaque; 
    picker.navigationBar.topItem.rightBarButtonItem.tintColor = [UIColor blackColor]; 
    [self presentViewController:picker animated:YES completion:NULL]; 

可能是您正在使用任何自定義導航欄，並將應用程序委託的屬性設置爲更改導航欄的色調顏色。

Answer 6

看起來像蘋果做了一些錯誤，它（的iOS 10，Xcode中8），因爲只是改變的UIImagePickerController的色調顏色無法完成的工作，事業，之前控制器沒有topItem財產或財產navigationController 。所以已經做了UIImagePickerController extension的更改。但我在那些被忽略的方法中檢查了navigationController和topItem：viewDidLoad,viewWillAppear,viewDidAppear。但它仍然是nil。所以我決定檢查它在viewWillLayoutSubviews，瞧！這不是零，所以我們可以在這裏設置精確的rightBarButtomItem的色調顏色！

這裏是例子：

extension UIImagePickerController { 
     open override func viewWillLayoutSubviews() { 
      super.viewWillLayoutSubviews() 
      self.navigationBar.topItem?.rightBarButtonItem?.tintColor = UIColor.black 
      self.navigationBar.topItem?.rightBarButtonItem?.isEnabled = true 
     } 
    } 

而且不要忘記調用super.viewWillLayoutSubviews，這是非常重要的;-) 編輯：但它仍然有問題，當返回到專輯畫面。 。

Answer 7

這是對我工作：

present(imagePicker, animated: true, completion: { 
     imagePicker.navigationBar.topItem?.rightBarButtonItem?.tintColor = .black 
    })