cocoa-touch - 如何在 iOS7 中为后退按钮创建自定义蒙版图像

Question

来自 dox :

• If you want to use a custom image to replace the default chevron, you also need to create a custom mask image. iOS 7 uses the mask to make the previous screen’s title appear to emerge from—or disappear into—the chevron during navigation transitions. To learn about the properties that control the Back button and mask image, see UINavigationBar Class Reference.

在 UINavigationBar 类引用中:

backIndicatorImage

The image shown beside the back button. @property(nonatomic, retain) UIImage *backIndicatorImage Discussion

If you want to customize the back indicator image, you must also set backIndicatorTransitionMaskImage. Availability

Available in iOS 7.0 and later.

See Also

  @property backIndicatorTransitionMaskImage

Declared In UINavigationBar.h backIndicatorTransitionMaskImage

The image used as a mask for content during push and pop transitions. @property(nonatomic, retain) UIImage *backIndicatorTransitionMaskImage Discussion

If you want to customize the back indicator image, you must also set backIndicatorImage. Availability

Available in iOS 7.0 and later.

See Also

  @property backIndicatorImage

Declared In UINavigationBar.h

请原谅我的无知，但提供的信息并没有告诉我太多。

是否有 cocoa 类可以制作具有所需图像的蒙版？或者我需要提供框架、弧线等吗？或者我只是在编辑器中制作我的图像的黑色轮廓？

Answer 1

我想这就是你要找的

self.navigationController.navigationBar.backIndicatorImage = [UIImage yourImage];
self.navigationController.navigationBar.backIndicatorTransitionMaskImage = [UIImage yourImage];