Question

是否可以在视图中实现手势识别器并将其传播到所有其他UI组件？如果我这样做，它就不起作用了：

  UISwipeGestureRecognizer *swipe = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(SwipeRecognizer:)];
  swipe.direction = UISwipeGestureRecognizerDirectionRight;

  [self.view addGestureRecognizer:swipe];
  [TitleLabel addGestureRecognizer:swipe];
  [DescLabel addGestureRecognizer:swipe];
  [_TopView addGestureRecognizer:swipe];
  [_BottomView addGestureRecognizer:swipe];
  [_ScrollView addGestureRecognizer:swipe];
  [_TableView addGestureRecognizer:swipe];

  [swipe release];

我该怎么做？

我需要在视图上添加透明视图，其中包含所有对象？或者有一种聪明的方法可以做到这一点？

Answer 1

你的发现是正确的：然而，为了完整起见，对多个组件的识别器相同......

NSInteger count = 1;
NSInteger total = [[self.view subviews] count];
for (id obj in [self.view subviews])
{
    NSLog(@"testing object %i of %i", count, total);
    count++;

    if ([obj respondsToSelector:@selector(addGestureRecognizer:)])
    {
        UISwipeGestureRecognizer *swipe = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(SwipeRecognizer:)];
        swipe.direction = UISwipeGestureRecognizerDirectionRight;
        [obj addGestureRecognizer: swipe];
        [swipe release];
        NSLog(@"swipe added");
    }
}

我预见到的唯一问题是，如果要将识别器应用于的任何对象嵌入到已经是self.view子视图的更多视图中。然后，您需要检查找到的self.view子视图是否为类型UIView，如果是，则迭代浏览视图的子视图等。

将手势识别器应用于所有视图组件？

1 个答案: