在 UIImagePickerController 中，取消按鈕未顯示？

Question

這里我使用下面的代碼。 如果有人知道這個問題，請幫助我。 我也試過下面的網址，但它不起作用。 請幫我

iOS7 UIImagePickerController 取消按鈕消失UIPopoverController 內的 UIImagePickerController 在 iOS7 上不顯示取消按鈕

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];

我的問題：

我的要求：

Answer 1

這對我有用：

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

Answer 2

看起來蘋果在它（iOS 10，Xcode 8）上犯了一些錯誤，因為無法完成更改 UIImagePickerController 的色調顏色，因為在控制器沒有topItem屬性或navigationController屬性之前。 所以已經完成了UIImagePickerController extension的更改。 但是我在這些重寫的方法中檢查了navigationController和topItem ： viewDidLoad 、 viewWillAppear 、 viewDidAppear 。 但它仍然nil 。 所以我決定在viewWillLayoutSubviews檢查它，瞧！ 它不是零，所以我們可以在這里設置精確 rightBarButtomItem 的條形着色顏色！

這是示例：

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

並且不要忘記調用super.viewWillLayoutSubviews ，這非常重要;-) 編輯：但是返回相冊屏幕時仍然有問題..

Answer 3

如果一切努力都不起作用，那么您必須使用 appearance() 方法。 因此，嘗試在您想要呈現的任何視圖控制器（UIImagePickerController）中編寫以下行。 您可以在任何類中使用外觀，但您可能已將 UIBarButtonItem.appearance() 用於其他目的，因此請找到並在 viewDidDisappear() 中編寫該代碼。

UIBarButtonItem.appearance().setTitleTextAttributes([NSAttributedStringKey.foregroundColor: UIColor.red], for: .normal)
UIBarButtonItem.appearance().setTitleTextAttributes([NSAttributedStringKey.foregroundColor: UIColor.red], for: .highlighted)

Answer 4

我認為您還沒有將 viewController 嵌入到導航控制器中

請這樣做並嘗試代碼：（目標 - 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

我使用了您發布的相同代碼。 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，並且您將應用程序委托的屬性設置為更改導航 nar 的色調顏色。

Answer 6

似乎更新一些項目屬性使按鈕可見，所以......只需像這樣啟用它：

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

Answer 7

如果以上任何一項都不適合您，請嘗試在定義UIImagePickerController時添加它

    imagePicker.modalPresentationStyle = .popover // Or.fullScreen (Can also check cases for iPad and iPhone as per requirement)

像魅力一樣為我工作。 被這件事搞得一團糟

Answer 8

Swift 4.2 解決方案，將以下代碼添加到 AppDelegate 的 didFinishLaunchingWithOptions 中

UINavigationBar.appearance(whenContainedInInstancesOf: [UIImagePickerController.self]).tintColor = .black

Answer 9

子類 UIPickerViewController 如下：

class CustomImagePicker: UIImagePickerController {

    override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)

        UINavigationBar.appearance().tintColor = UIColor.black
        UIBarButtonItem.appearance().setTitleTextAttributes([NSAttributedString.Key.foregroundColor : UIColor.init(red: 0.0, green: 122.0/255.0, blue: 1.0, alpha: 1.0)], for: .normal)
    }

    override func viewWillDisappear(_ animated: Bool) {

        UINavigationBar.appearance().tintColor = UIColor.white // your color
        UIBarButtonItem.appearance().setTitleTextAttributes(nil, for: .normal)
        super.viewWillDisappear(animated)

    }

}

並使用作為：

func openGallary()
    {
        picker!.sourceType = UIImagePickerController.SourceType.photoLibrary
        picker!.modalPresentationStyle = .currentContext
        self.present(picker!, animated: true, completion: nil)
    }

Answer 10

更改 UIImagePickerController navigationBar.tintColor 試試這個代碼：

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

Answer 11

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 12

這對我有用：

let BarButtonItemAppearance = UIBarButtonItem.appearance()

BarButtonItemAppearance.setTitleTextAttributes([NSForegroundColorAttributeName: .blue), NSFontAttributeName: UIFont.boldSystemFont(ofSize: 16.0)], for: .normal)

Answer 13

我遇到過這種同樣的問題，在浪費了很多時間之后我找到了解決方案。 我已經自定義了導航欄的外觀，就像下面的代碼一樣，為什么會發生這個問題。

    UINavigationBar.appearance().backIndicatorImage = UIImage(named: "ic_left")
    let attributes = [NSAttributedString.Key.font: UIFont(name: "FuturaPT-Medium", size: 16)!]
    UINavigationBar.appearance().titleTextAttributes = attributes
    UINavigationBar.appearance().setBackgroundImage(UIImage(named: "line.png"),for: .bottom,barMetrics: .default)
    UINavigationBar.appearance().shadowImage = UIImage(named: "line.png")

UIBarButtonItem.appearance().setTitleTextAttributes([NSAttributedString.Key.foregroundColor: UIColor.clear], for: .normal)

這只是導航欄的自定義外觀，我們只需要更改最后一行代碼，因為我已將標題顏色設置為清除。 這真的很簡單。 在展示您的圖像選擇器控制器之前放置此代碼。

UIBarButtonItem.appearance().setTitleTextAttributes([NSAttributedString.Key.foregroundColor: UIColor.black], for: .normal)

再次，如果您不希望導航欄按鈕標題清除文本顏色。 謝謝

Answer 14

請在 swift 3 或更高版本中嘗試此代碼

let picker = UIImagePickerController()

picker.navigationBar.topItem?.rightBarButtonItem?.tintColor = UIColor.white

Answer 15

斯威夫特 5：

  imagePicker.modalPresentationStyle = .fullScreen

Answer 16

試試這個代碼：

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

並添加委托方法： - (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 17

我認為這會對您有所幫助。只需將代碼粘貼到 imagePickerControllerDidCancel 中，然后將其關閉（Swift 4）。

picker.setNavigationBarHidden(false, animated: true)