滑动视图

 

 

 

 

 

【UIScrollView】

 

 

//内容区域

@property(nonatomic) CGSize contentSize;

//偏移

@property(nonatomic) CGPoint contentOffset;

//弹簧效果

@property(nonatomic) BOOL bounces; 

//分页效果

@property(nonatomic,getter=isPagingEnabled) BOOL pagingEnabled; 

//允许滑动视图本身，如果设为no只能通过函数滑动，不能直接用手滑动

@property(nonatomic,getter=isScrollEnabled) BOOL scrollEnabled;

//显示水平进度条

@property(nonatomic) BOOL showsHorizontalScrollIndicator;

//显示垂直进度条

@property(nonatomic) BOOL showsVerticalScrollIndicator; 

 

//放大和缩小的倍数（需要实现缩放的代理方法）

@property(nonatomic) CGFloat minimumZoomScale;

@property(nonatomic) CGFloat maximumZoomScale;

 

 

//设置偏移

- (void)setContentOffset:(CGPoint)contentOffset animated:(BOOL)animated;

 

 

【UIScrollViewDelegate】

//代理方法

//滑动过程中

- (void)scrollViewDidScroll:(UIScrollView *)scrollView;

//开始拖动

- (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView;

//停止拖动

- (void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate;

//开始滑动

- (void)scrollViewWillBeginDecelerating:(UIScrollView *)scrollView;

//停止滑动

- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView; 

 

//允许缩放的视图(一个scrollview中只能有一个可以缩放且必须设置可以缩放的位数)

- (UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView;

 

 

【UIPageControl】

//小点点

@property(nonatomic) NSInteger numberOfPages;

@property(nonatomic) NSInteger currentPage; 

 

//小点点的颜色

@property(nonatomic,retain) UIColor *pageIndicatorTintColor;

@property(nonatomic,retain) UIColor *currentPageIndicatorTintColor;

 

 

 

 

 

 

 

 

 

 

 

 

 

- (void)viewDidLoad

{

    [super viewDidLoad];

// Do any additional setup after loading the view, typically from a nib.

    

    //滚动视图

    UIScrollView *sv = [[UIScrollView alloc] initWithFrame:CGRectMake(30, 70, 240, 300)];

    sv.backgroundColor = [UIColor redColor];

    sv.tag = 1;

    [self.view addSubview:sv];

    

    //设置可以展示的大小（尺寸）

    sv.contentSize = CGSizeMake(480, 600);

    

    //设置弹簧效果

    sv.bounces = YES;

    

    //翻页效果

    sv.pagingEnabled = NO;

    

    //水平和垂直方向进度条的展示状态

    sv.showsHorizontalScrollIndicator = YES;

    sv.showsVerticalScrollIndicator = NO;

    

    //不允许用户拿手指头滑动

//    sv.scrollEnabled = NO;

    

    UIView *blueView = [[UIView alloc] initWithFrame:CGRectMake(260, 320, 50, 50)];

    blueView.backgroundColor = [UIColor blueColor];

    [sv addSubview:blueView];

    

    UIView *yellowView = [[UIView alloc] initWithFrame:CGRectMake(20, 20, 230, 290)];

    yellowView.backgroundColor = [UIColor yellowColor];

    [sv addSubview:yellowView];

}

 

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event

{

    UIScrollView *sv = (UIScrollView *)[self.view viewWithTag:1];

    

    //将偏移转成字符串，并打印

    NSLog(@"%@",NSStringFromCGPoint(sv.contentOffset));

    

    //直接设置偏移

//    sv.contentOffset = CGPointMake(240, 300);

    

    //带动画设置偏移

    [sv setContentOffset:CGPointMake(100, 100) animated:YES];

}

 

 

 

 

 

 

 

 

 

 

 

 

- (void)viewDidLoad

{

    [super viewDidLoad];

// Do any additional setup after loading the view, typically from a nib.

    self.view.backgroundColor = [UIColor grayColor];

    

    UIScrollView *sv = [[UIScrollView alloc] initWithFrame:CGRectMake(10, 40, 300, 300)];

    sv.backgroundColor = [UIColor yellowColor];

    [self.view addSubview:sv];

    

    UIImageView *iv = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"king2"]];

    iv.tag = 1;

    [sv addSubview:iv];

    

//    sv.contentSize = CGSizeMake(1200, 300);

    sv.delegate = self;

    sv.pagingEnabled = YES;

    

    //设置sv里子视图可以缩放的倍数

    sv.maximumZoomScale = 3;

    sv.minimumZoomScale = 0.5;

    

    

    //页码控制器

    UIPageControl *pc = [[UIPageControl alloc] initWithFrame:CGRectMake(100, 440, 120, 10)];

    pc.tag = 100;

    

    //总页数

    pc.numberOfPages = 4;

    

    [self.view addSubview:pc];

    

    //设置小点点的颜色

    pc.pageIndicatorTintColor = [UIColor redColor];

    pc.currentPageIndicatorTintColor = [UIColor greenColor];

    

    //不接收用户触摸事件

    pc.userInteractionEnabled = NO;

}

 

#pragma mark - scrollViewDelegate

 

- (UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView

{//设置sv中允许被缩放的子视图

    return [scrollView viewWithTag:1];

}

 

- (void)scrollViewDidScroll:(UIScrollView *)scrollView

{

//    NSLog(@"1=%@",NSStringFromCGPoint(scrollView.contentOffset));

}

 

- (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView

{

    NSLog(@"2=%@",NSStringFromCGPoint(scrollView.contentOffset));

}

 

- (void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate

{

    NSLog(@"3=%@%d",NSStringFromCGPoint(scrollView.contentOffset),decelerate);

}

 

- (void)scrollViewWillBeginDecelerating:(UIScrollView *)scrollView

{

    NSLog(@"4=%@",NSStringFromCGPoint(scrollView.contentOffset));

}

 

- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView

{

    int page = scrollView.contentOffset.x/300;

    

    NSLog(@"===========%d",page);

    

    UIPageControl *pc = (UIPageControl *)[self.view viewWithTag:100];

    

    //设置页码控制的当前页（从0开始的）

    pc.currentPage = page;

}