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Noob 正在开发一个应用程序,该应用程序显示从数组中随机选择的短文本——用户每次滑动时都会显示一个新文本。我使用的是“上一个”和“下一个”按钮,效果很好。然后我添加了滑动,向右滑动(从左侧)产生“上一个”,向左滑动(从右)产生“下一个”,但在这两种情况下,动画都是从右到左的滑动。然后我完全摆脱了按钮,左右滑动都产生了“下一个”——没有办法得到“上一个”——再次只有从右到左的滑动动画。

以下是来自的相关代码viewDidLoad

UISwipeGestureRecognizer *swipeRight = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(nextHaiku)];
swipeRight.numberOfTouchesRequired = 1;
swipeRight.direction = UISwipeGestureRecognizerDirectionRight;
[self.view addGestureRecognizer:swipeRight];
UISwipeGestureRecognizer *swipeLeft = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(nextHaiku)];
swipeLeft.numberOfTouchesRequired = 1;
swipeLeft.direction = UISwipeGestureRecognizerDirectionLeft;
[self.view addGestureRecognizer:swipeLeft];

这是“下一个”方法中的相关代码。

-(void)nextHaiku
{
<...a bunch of code setting up the UItextView 'haiku_text'...>

CATransition *transitionR = [CATransition animation];
transitionR.duration = 0.25;
transitionR.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
transitionR.type = kCATransitionPush;
transitionR.subtype =kCATransitionFromRight;
transitionR.delegate = self;
[self.view.layer addAnimation:transitionR forKey:nil];
[self.view addSubview:self.haiku_text];
}

同样,这里是“以前的”方法。

-(void)previousHaiku
{
<...a bunch of code setting up the UITextView haiku_text...>
        CATransition *transition = [CATransition animation];
        transition.duration = 0.25;
        transition.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
        transition.type = kCATransitionPush;
        transition.subtype =kCATransitionFromRight;
        transition.delegate = self;
        [self.view.layer addAnimation:transition forKey:nil];
        [self.view addSubview:self.haiku_text];

在这里,只是为了彻底,是我的连接图片:

我的人脉

关于我可能做错了什么的任何想法?

4

1 回答 1

3

在初始化时,viewDidLoad您对两个识别器使用相同的选择器。nextHaiky这会覆盖您在 IB 中所做的绑定

更改适当的UISwipeGestureRecognizerinit 以解决问题

于 2012-08-14T23:51:27.033 回答