MethodSwizzling
在+(void)load中使用方法调和不带有返回值的函数, 但是带有返回值的为什么交换不了啊? 比如我想在解析NSDictionary的时候,如果所得对象是nil,给一个提示。方法调和objectForKey:
在+(void)load中使用方法调和
在+(void)load中使用方法调和不带有返回值的函数, 但是带有返回值的为什么交换不了啊? 比如我想在解析NSDictionary的时候,如果所得对象是nil,给一个提示。方法调和objectForKey:
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