所有 UIButtons 的全局 ios 触觉反馈

Question

如何在整个应用程序中为每个 UIButton 的每个 touchupinside 事件应用触觉反馈，而无需为每个单独的按钮编写代码？我已经尝试创建一个 UIButton 类别并覆盖 - (BOOL)pointInside:(CGPoint)point withEvent:(UIEvent *)event 但这弄乱了我的一些 UIButton 操作，(我可能实现得很糟糕)

有人有什么建议吗？

Answer 1

在类别中覆盖提到@ChoungTran 的此类方法并不是一个好主意。如果您想自定义类别中的默认方法，最好在 swizzled method 中执行此操作.

但是，我更愿意创建一个派生自 UIButton 的自定义类，并在那里实现该逻辑并在需要触觉的任何地方使用该按钮。

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来自 Apple documentation :

Although the Objective-C language currently allows you to use a category to override methods the class inherits, or even methods declared in the class interface, you are strongly discouraged from doing so. A category is not a substitute for a subclass. There are several significant shortcomings to using a category to override methods:

When a category overrides an inherited method, the method in the category can, as usual, invoke the inherited implementation via a message to super. However, if a category overrides a method that exists in the category's class, there is no way to invoke the original implementation.

A category cannot reliably override methods declared in another category of the same class.

This issue is of particular significance because many of the Cocoa classes are implemented using categories. A framework-defined method you try to override may itself have been implemented in a category, and so which implementation takes precedence is not defined.

The very presence of some category methods may cause behavior changes across all frameworks. For example, if you override the windowWillClose: delegate method in a category on NSObject, all window delegates in your program then respond using the category method; the behavior of all your instances of NSWindow may change. Categories you add on a framework class may cause mysterious changes in behavior and lead to crashes.