iosUIScrollView以及UIPageControl的基本使用以及所有代理方法

//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

{

}