报警告
category is implementing a method which will also be implemented by its primary clase
- 我在category中重写了原类的方法 而苹果的官方文档中明确表示 我们不应该在category中复写原类的方法，如果要重写 请使用继承 原文是这样的：A category allows you to add new methods to an existing class. If you want to reimplement a method that already exists in the class, you typically create a subclass instead of a category.
解决方法
添加这两句
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wobjc-protocol-method-implementation"
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