调用objc_msgSend警告处理。

问题一

Implicitly declaring library function 'objc_msgSend' with type 'id (id, SEL, ...)'
Implicitly library function 'objc_msgSend' with type 'id(id, SEL, ...)' 1.include the header or explicitly provide a declaration for 'objc_msgSend'

解决办法:#import

问题二

Too many arguments to function callexpected 0have 3.

解决办法:

Build Setting->App LLVM 6.1-Preprocessing->Enable Strict Checking of objc_msgSend Call 设置成No

顺便提下:‘objc_msgSend’ 同时在都有定义,需要进一步了解其异同。

方法三
运行在64位的硬件上crash。
解决办法:需要将objc_msgSend重新声明成自己想要的参数,如下所示:

//objc_msgSend(self,selector,@"test");
((void(*)(id, SEL, id))objc_msgSend)(self, selector, @"test");

详情请参照苹果官方文档
Listing 2-14 Using a cast to call the Objective-C message sending functions

- (int) doSomething:(int) x { ... }
- (void) doSomethingElse {
    int (*action)(id, SEL, int) = (int (*)(id, SEL, int)) objc_msgSend;
    action(self, @selector(doSomething:), 0);
}

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