iPhone开发中一个良好的点击背景消失键盘代码

- (IBAction)resignKeyBoardInView:(UIView *)view {     for (UIView *v in view.subviews) {         if ([v.subviews count] > 0) {             [self resignKeyBoardInView:v];         }                 if ([v isKindOfClass:[UITextView class]] || [v isKindOfClass:[UITextField class]]) {             [v resignFirstResponder];         }     } }