比如如下代码:

-(void)performSelector:(SEL)selector onNode:(CCNode *)node                    withObject:(id)object recursive:(BOOL)isRecursive{    if ([node respondsToSelector:selector]) {        [node performSelector:selector withObject:object];    }    if (isRecursive) {        for (CCNode *child in node.children) {            [self performSelector:selector onNode:child withObject:object recursive:YES];        }    }}

在其中

[node performSelector:selector withObject:object];

一句会出现may cause a leak的错误:

你可以安全的忽略该错误,只要node上执行的selector不会返回一个指针或id类型.