//创建ScrollView的方法
-(void)createScrollView
{
UIScrollView *sv = [[UIScrollView alloc]initWithFrame:CGRectMake(5, 5, self.view.frame.size.width - 10, self.view.frame.size.height-10)];
//w代表sv.frame的宽度
CGFloat w = self.view.frame.size.width - 10;
//滑动的size的设置
//宽度 如果要横着滑动设置大于sv.frame的宽度
sv.contentSize = CGSizeMake(3*w, sv.frame.size.height-10);
//获得三个图放到UIImageView
for (int i =0; i<3; i++)
{
//获得三张图
UIImage*image =[UIImage imageNamed:[NSString stringWithFormat:@"43_%d.jpg",i+1]];
//三张图放到imageView上去
UIImageView *iv = [[UIImageView alloc]initWithImage:image];
//设定imageView的位置
iv.frame = CGRectMake(i*w, 0, w, self.view.frame.size.height-10);
// iv.userInteractionEnabled = YES;
//iv放到父视图 ScrollView上面去
[sv addSubview:iv];
}
//水平滑动指示条
sv.showsHorizontalScrollIndicator = NO;
//垂直滑动指示条
sv.showsVerticalScrollIndicator = NO;
//设置按页滑动 page
// sv.pagingEnabled = YES;
//弹性设置
sv.bounces = NO;
sv.userInteractionEnabled = YES;
//自带放大 缩小 option
//默认不自己放大缩小
//设置放大最大的倍数
sv.maximumZoomScale = 2;
//设置最小缩小到多大
sv.minimumZoomScale = 0.5;
//设置代理
sv.delegate = self;
//要不要返回顶部
sv.scrollsToTop = YES;
//添加背景色
sv.backgroundColor = [UIColor redColor];
//添加到主界面
[self.view addSubview:sv];
//
UIPageControl *pageC = [[UIPageControl alloc]initWithFrame:CGRectMake(0, 0, 200, 40)];
pageC.center=CGPointMake(150,300);
pageC.numberOfPages = 10;
pageC.currentPage =2;
pageC.tag = 200;
pageC.currentPageIndicatorTintColor = [UIColor greenColor];
[pageC addTarget:self action:@selector(pageC:) forControlEvents:UIControlEventValueChanged];
pageC.pageIndicatorTintColor = [UIColor blackColor];
pageC.backgroundColor = [UIColor redColor];
[self.view addSubview:pageC];
}
#pragma mark -delegate
//控制放缩 代理方法
- (UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView
{
//使得所有的界面都可以进行放缩
return scrollView.subviews[0];
}
//已经滑动
- (void)scrollViewDidScroll:(UIScrollView *)scrollView
{
NSLog(@"开始滑动之后 执行的方法");
NSInteger index = scrollView.contentOffset.x /scrollView.frame.size.width;
UIPageControl *pc =(UIPageControl*) [self.view viewWithTag:200];
pc.currentPage =index;
}
//已经放缩
- (void)scrollViewDidZoom:(UIScrollView *)scrollView
{
NSLog(@"放缩之后 执行的方法");
}
//开始拖动的方法
- (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView
{
NSLog(@"即将滑动的状态 指头轻轻一划");
}
// called on finger up if the user dragged. velocity is in points/millisecond. targetContentOffset may be changed to adjust where the scroll view comes to rest
- (void)scrollViewWillEndDragging:(UIScrollView *)scrollView withVelocity:(CGPoint)velocity targetContentOffset:(inout CGPoint *)targetContentOffset
{
//scrollview就是当前的scrollview
//velocity加速度
//offset 移动
NSLog(@"即将结束滑动，手指移开 惯性还在滑的时候");
}
- (void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate
{
NSLog(@"已经结束滑动");
}
- (void)scrollViewWillBeginDecelerating:(UIScrollView *)scrollView
{
NSLog(@"减速");
}
- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView
{
NSLog(@"减速完成 和滑动结束 状态基本一致");
}
- (void)scrollViewDidEndScrollingAnimation:(UIScrollView *)scrollView
{
NSLog(@"结束滑动的动画");
}
//- (nullable UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView; // return a view that will be scaled. if delegate returns nil, nothing happens
- (void)scrollViewWillBeginZooming:(UIScrollView *)scrollView withView:(UIView *)view
{
//
bigSmallV = view;
NSLog(@"即将开始缩放");
}
- (void)scrollViewDidEndZooming:(UIScrollView *)scrollView withView:(UIView *)view atScale:(CGFloat)scale
{
NSLog(@"已经结束缩放");
}
- (BOOL)scrollViewShouldScrollToTop:(UIScrollView *)scrollView
{
NSLog(@"返回是否可以滑动到顶部");
//返回YES表示可以滑动到顶部 返回No表示不可以滑动到顶部
return YES;
}
- (void)scrollViewDidScrollToTop:(UIScrollView *)scrollView
{
NSLog(@"已经返回到顶部");
}
#pragma mark - delegate
-(void)pageC:(UIPageControl *)pc
{
}