iOS让数组内对象执行同一方法

    // 让数组中的所有对象都执行removeFromSuperview方法

    [self.answerView.subviews makeObjectsPerformSelector:@selector(removeFromSuperview)];

//    for (UIView *subview in self.answerView.subviews) {

//        [subview removeFromSuperview];

//    }