如何让XCode不提示某个Warning

我在代码里写了一个

[self performSelector:NSSelectorFromString(callback)];

XCode提示

PerformSelector may cause a leak because its selector is unknown

但是我自己而已确定这个selector一定存在，有没有什么办法可以不要让这一行提示错误

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#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Warc-performSelector-leaks"
        [self performSelector:NSSelectorFromString(callback)];
#pragma clang diagnostic pop

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如果想忽略整个文件 就用-w