为了让Scott Thompson的宏更通用:

// String expander
#define MY_STRX(X) #X
#define MY_STR(X) MY_STRX(X)

#define MYSilenceWarning(FLAG, MACRO) \
_Pragma("clang diagnostic push") \
_Pragma(MY_STR(clang diagnostic ignored MY_STR(FLAG))) \
MACRO \
_Pragma("clang diagnostic pop")

然后这样使用它:

MYSilenceWarning(-Warc-performSelector-leaks,
[_target performSelector:_action withObject:self];
                )

在Xcode 4.2的LLVM 3.0编译器中，你可以像下面这样抑制警告:

#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Warc-performSelector-leaks"
    [self.ticketTarget performSelector: self.ticketAction withObject: self];
#pragma clang diagnostic pop

如果你在几个地方得到错误，并且想要使用C宏系统来隐藏指令，你可以定义一个宏来更容易地抑制警告:

#define SuppressPerformSelectorLeakWarning(Stuff) \
    do { \
        _Pragma("clang diagnostic push") \
        _Pragma("clang diagnostic ignored \"-Warc-performSelector-leaks\"") \
        Stuff; \
        _Pragma("clang diagnostic pop") \
    } while (0)

你可以像这样使用宏:

SuppressPerformSelectorLeakWarning(
    [_target performSelector:_action withObject:self]
);

如果你需要执行消息的结果，你可以这样做:

id result;
SuppressPerformSelectorLeakWarning(
    result = [_target performSelector:_action withObject:self]
);

为了子孙后代着想，我决定参加竞选:)

最近，我看到越来越多的重构偏离了目标/选择器范式，而倾向于协议、块等。然而，我已经使用过几次的performSelector有一个替代物:

[NSApp sendAction: NSSelectorFromString(@"someMethod") to: _controller from: nil];

这些似乎是一个干净的，弧安全的，和几乎相同的替代performSelector没有太多的objc_msgSend()。

不过，我不知道iOS上是否有类似的功能。

不要压制警告!

有不少于12个可选的解决方案来修补编译器。 虽然在第一次实现时你很聪明，但地球上很少有工程师能追随你的脚步，而这段代码最终会崩溃。

安全的路线:

所有这些解决方案都是可行的，只是在一定程度上与您的初衷有所不同。假设param可以为nil:

安全路线，相同的概念行为:

// GREAT
[_controller performSelectorOnMainThread:selector withObject:anArgument waitUntilDone:YES];
[_controller performSelectorOnMainThread:selector withObject:anArgument waitUntilDone:YES modes:@[(__bridge NSString *)kCFRunLoopDefaultMode]];

[_controller performSelector:selector onThread:[NSThread mainThread] withObject:anArgument waitUntilDone:YES];
[_controller performSelector:selector onThread:[NSThread mainThread] withObject:anArgument waitUntilDone:YES modes:@[(__bridge NSString *)kCFRunLoopDefaultMode]];

安全路线，行为稍有不同:

(见此回复) 使用任何线程代替[NSThread主线程]。

// GOOD
[_controller performSelector:selector withObject:anArgument afterDelay:0];
[_controller performSelector:selector withObject:anArgument afterDelay:0 inModes:@[(__bridge NSString *)kCFRunLoopDefaultMode]];

[_controller performSelectorOnMainThread:selector withObject:anArgument waitUntilDone:NO];
[_controller performSelectorOnMainThread:selector withObject:anArgument waitUntilDone:NO];
[_controller performSelectorOnMainThread:selector withObject:anArgument waitUntilDone:NO modes:@[(__bridge NSString *)kCFRunLoopDefaultMode]];

[_controller performSelectorInBackground:selector withObject:anArgument];

[_controller performSelector:selector onThread:[NSThread mainThread] withObject:anArgument waitUntilDone:NO];
[_controller performSelector:selector onThread:[NSThread mainThread] withObject:anArgument waitUntilDone:NO modes:@[(__bridge NSString *)kCFRunLoopDefaultMode]];

危险的路线

需要某种编译器静音，这是必然的破坏。请注意，目前，它确实在Swift中中断了。

// AT YOUR OWN RISK
[_controller performSelector:selector];
[_controller performSelector:selector withObject:anArgument];
[_controller performSelector:selector withObject:anArgument withObject:nil];

在编译器允许覆盖警告之前，可以使用运行时作为一种变通方法。

你需要标题:

#import <objc/message.h>

然后试试下面的方法:

// For strict compilers.
((id(*)(id,SEL))objc_msgSend)(_controller, sel_getUid("someMethod"));

OR

// Old answer's code:
objc_msgSend(_controller, NSSelectorFromString(@"someMethod"));

而不是:

[_controller performSelector:NSSelectorFromString(@"someMethod")];

奇怪但事实是:如果可以接受(即result为void并且你不介意让runloop循环一次)，添加一个延迟，即使这是零:

[_controller performSelector:NSSelectorFromString(@"someMethod")
    withObject:nil
    afterDelay:0];

这删除了警告，大概是因为它向编译器保证没有对象可以返回，并且在某种程度上管理不当。