小编Ruu*_*uug的帖子

一个简单的程序:

-(void)doSomething {

 NSLog(@"self rc=%d", [self retainCount]);

 [self performSelector:@selector(doMe:) withObject:nil afterDelay:0 inModes:[NSArray arrayWithObject:NSDefaultRunLoopMode]];

 NSLog(@"self rc=%d", [self retainCount]);
}

-(void)doMe:(id)object {

 NSLog(@"i'm done");

 NSLog(@"self rc=%d", [self retainCount]);

}

输出:

self rc=1

self rc=2

i'm done

self rc=2

为什么保留计数增加到并保持在2？