Ios UIScrollView与UIImageView。图像不会向上滚动
以下是UIScrollView、UIImageView的代码。 选择下一个映像时,将调用resetStatusImage。statusMessageImageView作为视图返回,用于放大UIScrollView委托。 使用最小缩放时,图像无法向上滚动,但仍有图像部分需要滚动。对于底部、左侧和右侧,它们完全可见,不能分别向下、向左和向右滚动。为什么图像在最小放大时不能向上滚动Ios UIScrollView与UIImageView。图像不会向上滚动,ios,objective-c,uiscrollview,uiimageview,Ios,Objective C,Uiscrollview,Uiimageview,以下是UIScrollView、UIImageView的代码。 选择下一个映像时,将调用resetStatusImage。statusMessageImageView作为视图返回,用于放大UIScrollView委托。 使用最小缩放时,图像无法向上滚动,但仍有图像部分需要滚动。对于底部、左侧和右侧,它们完全可见,不能分别向下、向左和向右滚动。为什么图像在最小放大时不能向上滚动 - (void)viewDidLoad { CGRect r = CGRectMake(0, 0, self.s
- (void)viewDidLoad
{
CGRect r = CGRectMake(0, 0, self.statusMessageTextView.bounds.size.width, 455);
statusMessageImageView = [[UIImageView alloc] initWithFrame:r];
statusMessageImageView.contentMode = UIViewContentModeCenter;
// Set up the scroll view for the image zooming in/out and scrolling.
imgScrollView = [[UIScrollView alloc] initWithFrame:statusMessageImageView.bounds];
[imgScrollView setScrollEnabled:YES];
[imgScrollView setClipsToBounds:YES];
[self.view addSubview:imgScrollView];
[imgScrollView setBackgroundColor:[UIColor yellowColor]];
[imgScrollView setContentSize:statusMessageImageView.frame.size]; // this is your image view size
imgScrollView.delegate = self;
UITapGestureRecognizer *doubleTapRecognizer =
[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(scrollViewDoubleTapped:)];
doubleTapRecognizer.numberOfTapsRequired = 2;
doubleTapRecognizer.numberOfTouchesRequired = 1;
[imgScrollView addGestureRecognizer:doubleTapRecognizer];
[imgScrollView addSubview:statusMessageImageView];
[imgScrollView addSubview:self.statusMessageTextView];
}
- (void)resetStatusImage
{
imgScrollView.zoomScale = 1.0;
UIImage *statusImage = self.statusImageManager.currentStatusImage;
NSLog(@"Image size %f %f", statusImage.size.width, statusImage.size.height);
// Set the image view fram size equal to the image size.
statusMessageImageView.frame = (CGRect){.origin=CGPointMake(0.0f, 0.0f), .size=statusImage.size};
[statusMessageImageView setImage:statusImage];
// Set the scroll view content size and zoom scale.
imgScrollView.contentSize = statusImage.size;
CGFloat scaleWidth = imgScrollView.frame.size.width / imgScrollView.contentSize.width;
CGFloat scaleHeight = imgScrollView.frame.size.height / imgScrollView.contentSize.height;
CGFloat maxScale = MAX(scaleWidth, scaleHeight);
imgScrollView.minimumZoomScale = maxScale;
imgScrollView.maximumZoomScale = 1.0f;
imgScrollView.zoomScale = maxScale;
// Save current scroll view content data
// to detect that the user changed the visible area.
contentOffsetX = imgScrollView.contentOffset.x;
contentOffsetY = imgScrollView.contentOffset.y;
zoomScale = imgScrollView.zoomScale;
}
这将对您有所帮助。状态消息文本查看高度值出错。此外,禁用的自动缩放会在缩放、移动图像时影响statusMessageTextView的位置:文本视图也会移动 但是这对他有什么帮助呢?你能补充更多的信息吗?
-(UIView *) viewForZoomingInScrollView:(UIScrollView *)inScroll {
return imageView;
}