IPhone之UIScrollView [转载]

原文地址：IPhone之UIScrollView作者：飞舞的鸡毛

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;
 //index为当前页码
 NSLog(@"%d",index);
}