我不明白为什么滚动视图不起作用,因为我遵循了教程中的建议。
我创建了UIScrollView
包含一个UIImageView
并且我还添加了方法
- (UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView
{
return imgv;
}
和UIScrollViewDelegate
在界面中,但它不起作用。
这是代码UIScrollView
:
imgv = [[UIImageView alloc]
initWithFrame:CGRectMake(0, 0, 1000, 500)];
imgv.image = [UIImage imageWithData:retrievedData];
scrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, 800, 800)];
scrollView setContentSize:CGSizeMake(imgv.image.size.width, imgv.image.size.height)];
scrollView.maximumZoomScale = 4;
scrollView.minimumZoomScale = 1;
[scrollView setScrollEnabled:YES];
scrollView.clipsToBounds = YES;
scrollView.delegate = self;
self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(hideImageView)];
[scrollView addSubview:imgv];
[view addSubview:scrollView];
如果有人能找出问题所在,我将不胜感激。