如何为所有屏幕的 iPhone 应用程序添加垂直滑动手势? [英] How to add a vertical swipe gesture to iPhone app for all screens?

问题描述

我想为我的应用添加一个手势，这样当用户垂直滑动时，它会触发一个方法来做某事.滑动可以是向上或向下.我从来没有用手势做过任何事情，所以这是我第一次使用手势，而不是 UITableView 中包含的用于删除行的手势.

I'd like to add a gesture to my app so when the user swipes vertically it triggers a method to do something. The swipe can be up or down. I've never done anything with gestures so this is my first use of a gesture other than what is included in a UITableView for deleting rows.

另一个问题是我的大部分屏幕都是 UITableView，所以用户可以简单地滚动 UITableView.所以我想知道我是否可以使用两指滑动(垂直)来检测运行代码的手势，而不是单指滑动来滚动 UITableView?

The other problem is that most of my screens are UITableViews so the user could be simply scrolling the UITableView. So I am wondering if I could use a two finger swipe (vertical) to detect the gesture to run the code vs. a single finger swipe to scroll the UITableView?

提前致谢.

尼尔

推荐答案

ApplicationDidLaunch 中的内容:

This goes in ApplicationDidLaunch:

UISwipeGestureRecognizer *swipeGesture = [[[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipedScreen:)] autorelease];
swipeGesture.numberOfTouchesRequired = 2;
    swipeGesture.direction = (UISwipeGestureRecognizerDirectionUp|UISwipeGestureRecognizerDirectionDown);

[window addGestureRecognizer:swipeGesture];

然后执行

- (void) swipedScreen:(UISwipeGestureRecognizer*)swipeGesture {
   // do stuff
}

使用 UIGestureRecognizer 和 UISwipeGestureRecognizer.

此外，如果您希望检测滑动的方向，则必须设置两个单独的手势识别器.您无法从滑动手势识别器获取滑动方向，只能获取其注册识别的方向.

Also if you wish to detect the direction of the swipe you will have to setup two separate gesture recognizers. You can not get the direction of a swipe from a swipe gesture recognizer, only the directions it is registered to recognize.

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