如果你不需要传递任何参数，一个简单的解决方法是使用valueForKeyPath。这甚至可以在Class对象上实现。

NSString *colorName = @"brightPinkColor";
id uicolor = [UIColor class];
if ([uicolor respondsToSelector:NSSelectorFromString(colorName)]){
    UIColor *brightPink = [uicolor valueForKeyPath:colorName];
    ...
}

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]
);

要使用执行选择器忽略文件中的错误，添加一个#pragma，如下所示:

#pragma clang diagnostic ignored "-Warc-performSelector-leaks"

这将忽略这一行上的警告，但仍然允许它贯穿整个项目的其余部分。

您还可以在这里使用协议。因此，创建一个这样的协议:

@protocol MyProtocol
-(void)doSomethingWithObject:(id)object;
@end

在需要调用选择器的类中，有一个@属性。

@interface MyObject
    @property (strong) id<MyProtocol> source;
@end

当你需要在MyObject的实例中调用@selector(doSomethingWithObject:)时，这样做:

[self.source doSomethingWithObject:object];

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")];