我想在我创建的分页 UIScrollView 上实现“缩放”效果,但我遇到了很多困难。我的目标是,当用户开始滚动到下一页时,当前页面会缩小以变得更小。当下一页进入 View 时,它会放大直到变成完整尺寸。我能找到的最接近示例的是这个......
https://www.pinterest.com/pin/147141112804210631/
谁能给我一些关于如何做到这一点的指示?在过去的 3 天里,我一直在用头撞墙。
Best Answer-推荐答案 strong>
我建议使用分页 UIScrollView 的 scrollView.contentOffset.y 来跟踪滚动,并使用该值来为 UIScrollView 内的 View 转换设置动画。
所以添加您的分页 ScrollView 并将自己设置为委托(delegate)。
paginatedScrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, [[self view] bounds].size.width, [[self view] bounds].size.height-paginatedScrollViewYOffset)];
[self.view addSubview:paginatedScrollView];
paginatedScrollView.pagingEnabled = YES;
[paginatedScrollView setShowsVerticalScrollIndicator:NO];
[paginatedScrollView setShowsHorizontalScrollIndicator:NO];
[paginatedScrollView setAlwaysBounceHorizontal:NO];
[paginatedScrollView setAlwaysBounceVertical:YES];
paginatedScrollView.backgroundColor = [UIColor clearColor];
paginatedScrollView.contentSize = CGSizeMake([[self view] bounds].size.width, [[self view] bounds].size.height*2); //this must be the appropriate size depending of the number of pages you want to scroll
paginatedScrollView.delegate = self;
然后使用委托(delegate)方法scrollViewDidScroll来跟踪scrollView.contentOffset.y
- (void) scrollViewDidScrollUIScrollView *)scrollView {
NSLog(@"Scroll Content Offset Y: %f",scrollView.contentOffset.y);
//use here scrollView.contentOffset.y as multiplier with view.transform = CGAffineTransformMakeScale(0,0) or with view.frame to animate the zoom effect
}
关于ios - 分页 UIScrollView 上的缩放效果?,我们在Stack Overflow上找到一个类似的问题:
https://stackoverflow.com/questions/36554774/
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