xcode UIScrollView 水平滚动 - 禁用左滚动
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/5041160/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
UIScrollView Horizontal scrolling - Disable left scroll
提问by user609906
How can I disable scrolling left on a UIScrollview. This is so users can only scroll right?
如何在 UIScrollview 上禁用向左滚动。这样用户就只能滚动了吧？
Thanks
谢谢
***UPDATE *****
** *更新*****
This is what I have now. I have subclassed UIScrollView and overwritten the following methods
这就是我现在所拥有的。我已经继承了 UIScrollView 并覆盖了以下方法
@implementation TouchScrollView
- (BOOL)touchesShouldBegin:(NSSet *)touches withEvent:(UIEvent *)event inContentView:(UIView *)view {
NSLog(@"touchesShouldBegin: I was touched!");
return YES;
}
- (BOOL)touchesShouldCancelInContentView:(UIView *)view {
NSLog(@"touchesShouldCancelInContentView: I was touched!");
return NO;
}
In my viewController I have also set the following attributes:
在我的 viewController 中，我还设置了以下属性：
scrollView.delaysContentTouches = NO;
scrollView.canCancelContentTouches = YES;
TouchesShouldBegin is being called but touchesShouldCancelInContentView is not being called and I cant figure out why!!
正在调用 TouchesShouldBegin 但没有调用 touchesShouldCancelInContentView，我不知道为什么！！
Thanks
谢谢
回答by meronix
just add this in your UIViewController UIScrollViewDelegate
只需在您的 UIViewController UIScrollViewDelegate 中添加它
float oldX; // here or better in .h interface
- (void)scrollViewDidScroll:(UIScrollView *)aScrollView
{
if (scrollView.contentOffset.x < oldX) {
[aScrollView setContentOffset: CGPointMake(oldX, aScrollView.contentOffset.y)];
} else {
oldX = aScrollView.contentOffset.x;
}
}
回答by knuku
You should handle swipe gestures.
您应该处理滑动手势。
Check similar question here: iOS Advanced Gestures: Getting Swipe Direction Vector
在此处检查类似问题：iOS 高级手势：获取滑动方向矢量
