我想在iPhone上隐藏两个滚动条.当我向上滚动时,他们应该再次出现..我该如何处理？
解决方法
接受的答案对我来说不起作用,因为scrollViewWillBeginScroll：不是委托方法.
相反我做
- -(void)scrollViewWillBeginDragging:(UIScrollView *)scrollView
- {
- [[NSNotificationCenter defaultCenter] postNotificationName:@"BaRSShouldHide" object:self];
- }
- -(void)scrollViewDidEndDragging:(UIScrollView *)scrollView
- willDecelerate:(BOOL)decelerate
- {
- if(!decelerate)
- [[NSNotificationCenter defaultCenter] postNotificationName:@"BaRSShouldUnhide"
- object:self];
- }
- - (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView
- {
- [[NSNotificationCenter defaultCenter] postNotificationName:@"BaRSShouldUnhide"
- object:self];
- }
应用程序对象中的任何地方都可以收听此通知,例如
- - (void)viewDidLoad
- {
- [super viewDidLoad];
- [[NSNotificationCenter defaultCenter] addObserverForName:@"BaRSShouldHide"
- object:nil
- queue:nil
- usingBlock:^(NSNotification *note) {
- //hide tab bar with animation;
- }];
- [[NSNotificationCenter defaultCenter] addObserverForName:@"BaRSShouldUnhide"
- object:nil
- queue:nil
- usingBlock:^(NSNotification *note) {
- //Unhide tab bar with animation;
- }];
- }
此代码将隐藏任何滚动条.如果你想只有下来,同一个位置处理技巧在接受的答案应该工作.
