iOS 使用带有 UILabel 的 UITapGestureRecognizer 滑动到下一页 [英] iOS using UITapGestureRecognizer with UILabel to swipe to the next page

问题描述

抱歉，如果我忽略了对我的问题的潜在答案，但是我在将 UITapGestureRecognizer 与子视图 UIViewController 类中的 UILabel 一起使用时遇到了麻烦...

Sorry if I overlooked a potential answer to my question, but I'm having trouble with using the UITapGestureRecognizer with a UILabel inside a subview UIViewController class...

基本上，我创建了一个自定义 UIViewController，它有一个 UILabel 和一些其他不相关的元素.然而，这个自定义 UIViewController 位于一个启用分页的自定义 UIScrollView 中，并且标签的偏移量刚好足以让您看到下一个 UIViewController 的标签.我想要做的是当用户触摸下一个"标签时，scrollRectToVisible:animated: 方法会触发，本质上是在不滚动的情况下切换页面.CustomViewController 的 UILabel 位于顶部.

Basically, I've created a custom UIViewController that has a UILabel and a few other irrelevant elements. This custom UIViewController, however, is inside a custom UIScrollView with paging enabled and the labels are offset just enough so you can see the next UIViewController's label. What I want to do is when the user touches the "next" label, the scrollRectToVisible:animated: method fires, essentially switching pages without scrolling. The CustomViewController's UILabels are situated on the top.

以下是将 UITapGestureRecognizer 添加到 CustomViewController 的 UILabel 时容器 UIScrollView 的示例代码:

Here's an example code for the container UIScrollView when adding the UITapGestureRecognizer to the CustomViewController's UILabel:

[scrollView addSubview:CustomViewController];

- (void) addSubview: (CustomViewController *) view {
    // create view's frame here...
    UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(fireScrollRectToVisible:view)]; // this is the current problem like a lot of people out there...
    [view.Label addGestureRecognizer:tap];
    // [super addSubview:view.view];
}
- (void) fireScrollRectToVisible: (CustomViewController *) cvc {
    CGRect frame = CGRectMake(cvc.view.frame.origin.x, cvc.view.frame.origin.y, 320, 480);
    [scrollView scrollRectToVisible: frame animated:YES];
}

我最初认为这很容易，但是由于@selector 不允许您放置参数，因此它变得非常困难.我想我需要的是访问 CustomViewController 的框架并将 scrollRectToVisible 设置为该框架，但我不确定了...

I initially thought this would be easy, but since the @selector doesn't allow you to place arguments it made it incredibly difficult. I think what I need is to access the CustomViewController's frame and set the scrollRectToVisible to that, but I'm not sure anymore...

我已经尝试过这篇文章，但我对 Objective-C 很陌生，我不完全理解 hitTest:withEvent:我假设 hitTest:(CGPoint) 与视图的边界有关?

I've tried this post but I'm very new at Objective-C and I don't fully understand the hitTest:withEvent: I'm assuming the hitTest:(CGPoint) has something to do with the view's bounds?

UITapGestureRecognizer initWithTarget:action:获取参数的方法?

如果有人能指出我正确的方向，那就太好了.任何帮助将不胜感激！

If anyone can point me in the right direction that would be great. Any help would be greatly appreciated!

推荐答案

我根据你的代码做了一些改动

I do some change based on your code

- (void) addSubview: (CustomViewController *) view {
    // create view's frame here...
    UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(fireScrollRectToVisible:)]; // this is the current problem like a lot of people out there...
    [view.Label addGestureRecognizer:tap];
    // [super addSubview:view.view];
}
- (void) fireScrollRectToVisible: (UIGestureRecognizer *) gesture {
    UIView *view = [gesture.view superview];
    CGRect frame = CGRectMake(view.frame.origin.x, view.frame.origin.y, 320, 480);
    [scrollView scrollRectToVisible: frame animated:YES];
}

希望能帮到你.

这篇关于iOS 使用带有 UILabel 的 UITapGestureRecognizer 滑动到下一页的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！