NSMutableArray *textFieldArray = [NSMutableArray arrayWithCapacity:5]; for (UIView *textField in self.view.subviews) { if ([textField isKindOfClass:[UITextField class]]) { [textFieldArray addObject:textField]; } }
用isKindOfClass判断指定类型
原文：http://www.cnblogs.com/litaowei/p/3778954.html