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];
                )

我的猜测是这样的:因为选择器对编译器是未知的，ARC不能强制执行适当的内存管理。

事实上，有时内存管理通过特定的约定与方法的名称绑定在一起。具体来说，我在考虑方便构造函数和make方法;前者按照约定返回一个自动释放的对象;后者是一个保留对象。该约定基于选择器的名称，因此如果编译器不知道选择器，那么它就不能强制执行正确的内存管理规则。

如果这是正确的，我认为你可以安全地使用你的代码，只要你确保内存管理一切正常(例如，你的方法不返回它们分配的对象)。

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];

这里有很多答案，但由于这个有点不同，我把几个答案结合起来，我想我应该把它放进去。我使用一个NSObject类别检查，以确保选择器返回void，也抑制编译器警告。

#import <Foundation/Foundation.h>
#import <objc/runtime.h>
#import "Debug.h" // not given; just an assert

@interface NSObject (Extras)

// Enforce the rule that the selector used must return void.
- (void) performVoidReturnSelector:(SEL)aSelector withObject:(id)object;
- (void) performVoidReturnSelector:(SEL)aSelector;

@end

@implementation NSObject (Extras)

// Apparently the reason the regular performSelect gives a compile time warning is that the system doesn't know the return type. I'm going to (a) make sure that the return type is void, and (b) disable this warning
// See http://stackoverflow.com/questions/7017281/performselector-may-cause-a-leak-because-its-selector-is-unknown

- (void) checkSelector:(SEL)aSelector {
    // See http://stackoverflow.com/questions/14602854/objective-c-is-there-a-way-to-check-a-selector-return-value
    Method m = class_getInstanceMethod([self class], aSelector);
    char type[128];
    method_getReturnType(m, type, sizeof(type));

    NSString *message = [[NSString alloc] initWithFormat:@"NSObject+Extras.performVoidReturnSelector: %@.%@ selector (type: %s)", [self class], NSStringFromSelector(aSelector), type];
    NSLog(@"%@", message);

    if (type[0] != 'v') {
        message = [[NSString alloc] initWithFormat:@"%@ was not void", message];
        [Debug assertTrue:FALSE withMessage:message];
    }
}

- (void) performVoidReturnSelector:(SEL)aSelector withObject:(id)object {
    [self checkSelector:aSelector];

#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Warc-performSelector-leaks"
    // Since the selector (aSelector) is returning void, it doesn't make sense to try to obtain the return result of performSelector. In fact, if we do, it crashes the app.
    [self performSelector: aSelector withObject: object];
#pragma clang diagnostic pop    
}

- (void) performVoidReturnSelector:(SEL)aSelector {
    [self checkSelector:aSelector];

#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Warc-performSelector-leaks"
    [self performSelector: aSelector];
#pragma clang diagnostic pop
}

@end

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")];

@c-road在这里提供了正确的问题描述链接。下面您可以看到我的示例，当performSelector导致内存泄漏时。

@interface Dummy : NSObject <NSCopying>
@end

@implementation Dummy

- (id)copyWithZone:(NSZone *)zone {
  return [[Dummy alloc] init];
}

- (id)clone {
  return [[Dummy alloc] init];
}

@end

void CopyDummy(Dummy *dummy) {
  __unused Dummy *dummyClone = [dummy copy];
}

void CloneDummy(Dummy *dummy) {
  __unused Dummy *dummyClone = [dummy clone];
}

void CopyDummyWithLeak(Dummy *dummy, SEL copySelector) {
  __unused Dummy *dummyClone = [dummy performSelector:copySelector];
}

void CloneDummyWithoutLeak(Dummy *dummy, SEL cloneSelector) {
  __unused Dummy *dummyClone = [dummy performSelector:cloneSelector];
}

int main(int argc, const char * argv[]) {
  @autoreleasepool {
    Dummy *dummy = [[Dummy alloc] init];
    for (;;) { @autoreleasepool {
      //CopyDummy(dummy);
      //CloneDummy(dummy);
      //CloneDummyWithoutLeak(dummy, @selector(clone));
      CopyDummyWithLeak(dummy, @selector(copy));
      [NSThread sleepForTimeInterval:1];
    }} 
  }
  return 0;
}

在我的例子中，唯一导致内存泄漏的方法是CopyDummyWithLeak。原因是ARC不知道，copySelector返回retain object。

如果你运行内存泄漏工具，你可以看到下面的图片: .．.在其他任何情况下都没有内存泄漏: