iOS-UIScrollView 滚动视图

/////记得添加 代理 <UIScrollViewDelegate>

UIScrollView* sv = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, 320, 460)];
[self.view addSubview:sv];
  
    //常用属性
    //真正大小,在这里frame仅代表可视位置和范围
    sv.contentSize = CGSizeMake(320 * 17, 460 * 2);
    //偏移量,frame左上角顶点相对于contentView左上角顶点的偏移量
    sv.contentOffset = CGPointMake(0, 0);
    //[sv setContentOffset: animated:]
    //分页
    sv.pagingEnabled = YES;
    //设置额外的空间
    sv.contentInset = UIEdgeInsetsMake(0, 0, 0, 0);
    //锁定方向，左右滑动和上下滑动不能同时进行
    sv.directionalLockEnabled = YES;
    //反弹效果
    sv.bounces = YES;
    //水平方向上保持反弹效果
    sv.alwaysBounceHorizontal = YES;
    //垂直方向上保持反弹效果
    sv.alwaysBounceVertical = YES;
    //开启滑动
    sv.scrollEnabled = YES;
    //隐藏水平状态条
    sv.showsHorizontalScrollIndicator = YES;
    //隐藏垂直状态条
    sv.showsVerticalScrollIndicator = YES;
    //状态条位置
    //sv.scrollIndicatorInsets = UIEdgeInsetsMake(100, 100, 100, 100);
    //状态条类型
    sv.indicatorStyle = UIScrollViewIndicatorStyleDefault;
    //减速速率 范围0~1
    sv.decelerationRate = 0.5;
    //delaysContentTouches
    //sv.delaysContentTouches = NO;
    sv.delegate = self;
    sv.tag = 10;
    
    //添加内容  图片
    for (int i = 0; i < 17; i++) {
        UIScrollView* subSv = [[UIScrollView alloc] initWithFrame:CGRectMake(i * 320, 0, 320, 460)];
        subSv.delegate = self;
        subSv.minimumZoomScale = 0.5;
        subSv.maximumZoomScale = 2.0;
        [sv addSubview:subSv];
        [subSv release];
        //添加点击设置缩放 [sv setZoomScale:1.5 animated:YES];
        UIImageView* imageView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 320, 460)];
        imageView.image = [UIImage imageNamed:[NSString stringWithFormat:@"10_%d.jpg",i]];
        [subSv addSubview:imageView];
        [imageView release];
    }
    //这个button 只显示在第一张图片上
    UIButton* button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
    button.frame = CGRectMake(100, 100, 100, 40);
    button.backgroundColor = [UIColor yellowColor];
    [sv addSubview:button];
    [button addTarget:self action:@selector(buttonClick) forControlEvents:UIControlEventTouchUpInside];
    
    
    ///事件
    - (void)buttonClick{
    NSLog(@"点击了");
//    UIScrollView* sv = (UIScrollView*)[self.view viewWithTag:10];
//    [sv setContentOffset:CGPointMake(320 * 5, 0) animated:YES];
    self.view.hidden=YES;
}

//缩放
- (UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView{
    if (scrollView.tag == 10) {
        return nil;
    }
    for (UIView* view in scrollView.subviews) {
        if ([view isKindOfClass:[UIImageView class]]) {
            return view;
        }
    }
    return nil;
}


//滑动调用，contentOffSet发生偏移
- (void)scrollViewDidScroll:(UIScrollView *)scrollView{
    //int page = scrollView.contentOffset.x / 320;
    //NSLog(@"%d",page);

}

//将要开始拖拽
- (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView{
    NSLog(@"将要开始拖拽");
}

//将要结束拖拽
- (void)scrollViewWillEndDragging:(UIScrollView *)scrollView withVelocity:(CGPoint)velocity targetContentOffset:(inout CGPoint *)targetContentOffset{
    NSLog(@"将要结束拖拽");
}

//结束拖拽
- (void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate{
    NSLog(@"结束拖拽 %d",decelerate);
}

//将要开始减速
- (void)scrollViewWillBeginDecelerating:(UIScrollView *)scrollView{
    NSLog(@"将要开始减速");
}

//结束减速
- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView{
    NSLog(@"结束减速");
}

- (void)scrollViewDidEndScrollingAnimation:(UIScrollView *)scrollView{
    NSLog(@"结束动画");
}

- (BOOL)scrollViewShouldScrollToTop:(UIScrollView *)scrollView{
    NSLog(@"要滑动到顶部");
    return YES;
}

- (void)scrollViewDidScrollToTop:(UIScrollView *)scrollView{
    NSLog(@"已经滑动到顶部");
}



//将要开始缩放
- (void)scrollViewWillBeginZooming:(UIScrollView *)scrollView withView:(UIView *)view{
    NSLog(@"开始缩放");
}

//正在缩放
- (void)scrollViewDidZoom:(UIScrollView *)scrollView{
    NSLog(@"缩放中");
}

//结束缩放
- (void)scrollViewDidEndZooming:(UIScrollView *)scrollView withView:(UIView *)view atScale:(float)scale{
    NSLog(@"缩放结束:%f",scrollView.zoomScale);
}

问题：

1、使用UINavigationController后导致UIScrollView位置变化（下移）

分析：不要让UIScrollView成为第一个视图。

解决：

<1>添加UIScrollView之前添加一个1像素的view

UIView *view = [[UIView alloc] initWithFrame:CGRectMake(0, Screen_Height, 1, 1)];

[self.view addSubview:view];

http://blog.csdn.net/b719426297/article/details/22290257