自定義后退按鈕出現在UIImagePickerController上

Question

我使用以下代碼在我的應用程序中自定義導航欄上的后退按鈕：

UIImage *backButton = [[UIImage imageNamed:@"backButton"] resizableImageWithCapInsets:UIEdgeInsetsMake(0, 0, 0, 0)];
UIImage *backButtonOn = [[UIImage imageNamed:@"backButton_on"] resizableImageWithCapInsets:UIEdgeInsetsMake(0, 0, 0, 0)];
[[UIBarButtonItem appearance] setBackButtonBackgroundImage:backButton
                                                  forState:UIControlStateNormal
                                                barMetrics:UIBarMetricsDefault];
[[UIBarButtonItem appearance] setBackButtonBackgroundImage:backButtonOn
                                                  forState:UIControlStateHighlighted
                                                barMetrics:UIBarMetricsDefault];

它工作得很好，除非我呈現UIImagePickerController並在照片庫中輸入相冊，后退按鈕也是自定義后退按鈕。 如何取回圖像選擇器中的原始后退按鈕？

Answer 1

 [[UIBarButtonItem appearanceWhenContainedIn:[UIImagePickerController class], nil] setBackButtonBackgroundImage:[UIImage imageNamed:@"blank-button"] forState:UIControlStateNormal barMetrics:UIBarMetricsDefault];

這是正確的方法

Answer 2

試試這個：

    [[UINavigationBar appearanceWhenContainedIn:[YourClassThatsNotAUIImagePicker class], nil] setBackButtonBackgroundImage:someOtherImage forBarMetrics:UIBarMetricsDefault];

這應該將您的外觀設置限制為僅列出的類，因此單獨保留UIImagePickerController。

Answer 3

1.for swift和ios9（上面的答案會是這樣的） -

    UIBarButtonItem.appearanceWhenContainedInInstancesOfClasses([UIImagePickerController.self]).setBackButtonBackgroundImage(UIImage(named: "blank-button"), forState: UIControlState.Normal, barMetrics: UIBarMetrics.Default)

2.如果要修改UINavigationBar的backIndicatorImage

UINavigationBar.appearanceWhenContainedInInstancesOfClasses([UIImagePickerController.self]).backIndicatorImage = UIImage(named: "backButton")//or nil

3.如果要修改backIndicatorTransitionMaskImage

UINavigationBar.appearanceWhenContainedInInstancesOfClasses([UIImagePickerController.self]).backIndicatorTransitionMaskImage =UIImage(named: "backButton")// nil