摘要：
UIView*v=[[UIViewalloc]initWithFrame:CGRectZero]; [tableViewsetTableFooterView:v];[v release]; 阅读全文
摘要：
默认的performSelector支持最多传递两个参数，要想传递超过两个的参数，需要使用NSInvocation来模拟performSelector的行为，如下：- (id)performSelector:(SEL)aSelector withObjects:(NSArray *)argumentsArray{ NSMethodSignature *sig = [selfmethodSignatureForSelector:aSelector]; if (sig) { NSInvocation *invocation = [NSInvocationinvocationWithMe... 阅读全文