范例 UIScrollView

最新推荐文章于 2020-09-16 10:41:35 发布

转载最新推荐文章于 2020-09-16 10:41:35 发布 · 597 阅读

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#uiview #class #手机 #c

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本文介绍如何使用UIScrollView创建画轴效果，通过设置属性使视图能在iPhone屏幕上左右滑动，并展示了初始化代码及滑动事件处理方法。

文章来源： http://hi.baidu.com/popln/blog/item/970bbb06b5c21bd97b89470a.html

UIScrollView可以产生画轴的效果，可以在手机屏中左右滑动。

初始化代码为：

mainView = [[UIScrollView alloc] initWithFrame:CGRectMake(0.0, 0.0, self.view.frame.size.width, 400)];
mainView.directionalLockEnabled = YES;
mainView.pagingEnabled = YES;
mainView.backgroundColor = [UIColor blueColor];
mainView.showsVerticalScrollIndicator = NO;
mainView.showsHorizontalScrollIndicator = NO;
mainView.delegate = self;

CGSize newSize = CGSizeMake(self.view.frame.size.width * 2, self.view.frame.size.height);
[mainView setContentSize:newSize];

[self.view addSubview:mainView];

pageControl = [[UIPageControl alloc] initWithFrame:CGRectMake(0.0, 401, self.view.frame.size.width, 80)];
pageControl.hidesForSinglePage = YES;
pageControl.userInteractionEnabled = NO;
pageControl.backgroundColor = [UIColor redColor];
[self.view addSubview:pageControl];

UIView *view1=[[UIView alloc] initWithFrame:CGRectMake(0.0, 0.0, self.view.frame.size.width, self.view.frame.size.height)];
view1.backgroundColor=[UIColor redColor];

[mainView addSubview:view1];

UIView *view2=[[UIView alloc] initWithFrame:CGRectMake(self.view.frame.size.width, 0.0, self.view.frame.size.width, self.view.frame.size.height)];
view2.backgroundColor=[UIColor blueColor];

[mainView addSubview:view2];

滑动的事件为：

#pragma mark -
#pragma mark UIScrollView
- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView{
if ([scrollView isKindOfClass:[UITableView class]]) {
return;
}

int index = fabs(scrollView.contentOffset.x) / scrollView.frame.size.width;

pageControl.currentPage = index;