有时候需要啥忽略警告的方法,特别是在.m文件中

#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Warc-performSelector-leaks"
        [myobj performSelector:sel];
        
        if([myobj respondsToSelector:sel2])//判断方法是否已被实现
            [myobj performSelector:sel2];
        else
            NSLog(@"此对象没有实现这个方法");