- (void)viewDidLoad {
[super viewDidLoad];
_scrollView.backgroundColor=[UIColor redColor];//设置contentSize（必须设置）_scrollView.contentSize = CGSizeMake(400,667);//偏移量_scrollView.contentOffset = CGPointMake(100,0);//contentInset(在原有的基础上调整内容滚动区域的大小)//_scrollView.contentInset = UIEdgeInsetsMake(-100, 0, 0, 0);//锁定方向(当系统识别滚动方向的时候，会把另外一个方向锁定，如果识别不了，就不锁定方向)_scrollView.directionalLockEnabled =YES;//反弹效果(默认为yes)_scrollView.bounces =YES;//默认是no，假如是yes并且bounces是yes,甚至如果内容大小小于bounds的时候，允许垂直拖动_scrollView.alwaysBounceVertical =YES;//分页（默认no）_scrollView.pagingEnabled =YES;//滚动(默认yes允许滚动)_scrollView.scrollEnabled =YES;//滚动条//showsHorizontalScrollIndicator默认yes 显示_scrollView.showsHorizontalScrollIndicator =NO;//滚动条滚动的范围(垂直滚动条滚动范围上下各缩小50)_scrollView.scrollIndicatorInsets = UIEdgeInsetsMake(50,0,50,0);//样式_scrollView.indicatorStyle =UIScrollViewIndicatorStyleWhite;//Do any additional setup after loading the view, typically from a nib.}
- (void)viewDidLoad {
[super viewDidLoad];//创建并添加scrollViewUIScrollView *scrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(100,200,200,300)];
[self.view addSubview:scrollView];
scrollView.backgroundColor=[UIColor redColor];
//设置内容视图的大小scrollView.contentSize = CGSizeMake(375,667);
//设置内容视图UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(0,0,375,667)];
imageView.image= [UIImage imageNamed:@"new_feature_1"];
[scrollView addSubview:imageView];
_imageView=imageView;
//设置代理scrollView.delegate=self;
//[self performSelector:@selector(changeScrollViewContentOffSet:) withObject:scrollView afterDelay:3];
//设置缩放内容视图的缩放比例范围scrollView.minimumZoomScale =0.5;
scrollView.maximumZoomScale=1.5;
//当缩放比例超出范围之后，是否有反弹效果（no:不会超出范围，yes:超出范围之后反弹）scrollView.bouncesZoom =YES;
//属性设置滚动至顶部
//scrollView.scrollsToTop = YES;
//Do any additional setup after loading the view, typically from a nib.}
-(void)changeScrollViewContentOffSet:(UIScrollView *)scrollView{
[scrollView setContentOffset:CGPointMake(0,300) animated:YES];
}
#if0#pragmamark -UIScrollViewDelegate 滚动
//当scrollView滚动的时候，不停调用（可以监听scrollView的contentOffset）
- (void)scrollViewDidScroll:(UIScrollView *)scrollView{
//NSLog(@"%@",NSStringFromCGPoint(scrollView.contentOffset));//NSLog(@"decelerating：%d",scrollView.decelerating);//NSLog(@"dragging：%d",scrollView.dragging);//NSLog(@"tracking:%d",scrollView.tracking);NSLog(@"%s",__func__);
}
//开始拖动的时候调用
- (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView{
//NSLog(@"tracking:%d",scrollView.tracking);NSLog(@"%s",__func__);
}
//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
//将要结束拖动
- (void)scrollViewWillEndDragging:(UIScrollView *)scrollView withVelocity:(CGPoint)velocity targetContentOffset:(inout CGPoint *)targetContentOffset {
//NSLog(@"velocity:%@",NSStringFromCGPoint(velocity));//NSLog(@"targetContentOffset:%@",NSStringFromCGPoint(*targetContentOffset));
//强制设置scrollView的偏移量
targetContentOffset = CGPointMake(0, 200);
NSLog(@"%s",__func__);
}
//已经结束拖动
- (void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate{//NSLog(@"dragging：%d",scrollView.dragging);NSLog(@"%s",__func__);
}
//将要开始减速
- (void)scrollViewWillBeginDecelerating:(UIScrollView *)scrollView{//NSLog(@"decelerating：%d",scrollView.decelerating);NSLog(@"%s",__func__);
}
//减速完成（停止）
- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView{//NSLog(@"contentOffset:%@",NSStringFromCGPoint(scrollView.contentOffset));NSLog(@"%s",__func__);
}
//called when setContentOffset/scrollRectVisible:animated: finishes. not called if not animating
- (void)scrollViewDidEndScrollingAnimation:(UIScrollView *)scrollView{
NSLog(@"%s",__func__);
}
#endif#pragmamark -UIScrollViewDelegate(缩放)
//指定缩放视图
- (nullable UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView{
NSLog(@"%s,zooming:%d",__func__,scrollView.zooming);return_imageView;
}
//缩放之前调用
- (void)scrollViewWillBeginZooming:(UIScrollView *)scrollView withView:(nullable UIView *)view {
NSLog(@"%s,zooming:%d",__func__,scrollView.zooming);
}
//完成缩放
- (void)scrollViewDidEndZooming:(UIScrollView *)scrollView withView:(nullable UIView *)view atScale:(CGFloat)scale{
NSLog(@"%s,zooming:%d",__func__,scrollView.zooming);
}
//缩放时调用
- (void)scrollViewDidZoom:(UIScrollView *)scrollView{
NSLog(@"%s,zooming:%d",__func__,scrollView.zooming);
}
#pragmamark -UIScrollViewDelegate(滚动至顶部)//允许滚动至顶部
- (BOOL)scrollViewShouldScrollToTop:(UIScrollView *)scrollView{returnYES;
}
//已经滚动至顶部
- (void)scrollViewDidScrollToTop:(UIScrollView *)scrollView{
NSLog(@"加载新数据，刷新界面");
}