自定义后退按钮出现在UIImagePickerController上

Question

我使用以下代码在我的应用程序中自定义导航栏上的后退按钮:

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,除非我呈现UIImagePickerController并在照片库中输入相册,后退按钮也是自定义后退按钮.如何取回图像选择器中的原始后退按钮？

Answer 1

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

这是正确的方法

Answer 2

尝试使用这个：

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

这应该将您的外观设置限制为仅列出的类，因此无需考虑 UIImagePickerController。