我有一个带有 UIImageView 的 UIScrollView 以启用缩放功能。
现在的问题是 scrollView 应该全屏显示(导航栏除外),但它显示有一个奇怪的“偏移量”。
红色矩形是显示的奇怪偏移量,而图像应该占据整个视图,但事实并非如此。如您所见,它正在被削减。
我尝试更改框架、边界等,但结果相同。
这是我的代码:
- (void)viewDidLoad
{ [super viewDidLoad];
self.view.backgroundColor = [UIColor scrollViewTexturedBackgroundColor];
imageScrollView.bouncesZoom = YES;
imageScrollView.delegate = self;
imageScrollView.clipsToBounds = NO; // If set to yes, the image would be like the screen above
imageView = [[UIImageView alloc] init];
imageView.clipsToBounds = YES;
imageScrollView.autoresizingMask = (UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleRightMargin);
//activity indicator
UIActivityIndicatorView *activityIndicator = [[[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge] autorelease];
activityIndicator.hidesWhenStopped = YES;
activityIndicator.hidden = NO;
activityIndicator.center = CGPointMake(self.imageView.frame.size.width /2, self.imageView.frame.size.height/2);
[activityIndicator startAnimating];
[imageView setImageWithURL:[NSURL URLWithString:tipImageString]
placeholderImage:nil options:SDWebImageProgressiveDownload
success:^(UIImage *image) { [activityIndicator stopAnimating];[activityIndicator removeFromSuperview]; }
failure:^(NSError *error) { [activityIndicator stopAnimating];[activityIndicator removeFromSuperview]; }];
[imageView addSubview:activityIndicator];
imageView.userInteractionEnabled = YES;
imageView.autoresizingMask = (UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleRightMargin);
imageView.center = [[imageScrollView window] center];
imageView.contentMode = UIViewContentModeScaleAspectFit;
[imageScrollView setContentMode:UIViewContentModeScaleAspectFit];
[imageScrollView addSubview:imageView];
imageScrollView.contentSize = self.imageView.image.size;
imageScrollView.decelerationRate = UIScrollViewDecelerationRateFast;
CGSize boundsSize = self.imageScrollView.bounds.size;
imageView.frame = CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height);
CGRect frameToCenter = imageView.frame;
// center horizontally
if (frameToCenter.size.width < boundsSize.width)
frameToCenter.origin.x = (boundsSize.width - frameToCenter.size.width) / 2;
else
frameToCenter.origin.x = 0;
// center vertically
if (frameToCenter.size.height < boundsSize.height)
frameToCenter.origin.y = (boundsSize.height - frameToCenter.size.height) / 2;
else
frameToCenter.origin.y = 0;
imageView.frame = frameToCenter;
// calculate minimum scale to perfectly fit image width, and begin at that scale
float minimumScale = 0.50;//[imageScrollView frame].size.width / [imageView frame].size.width;
imageScrollView.maximumZoomScale = 5.0;
imageScrollView.minimumZoomScale = minimumScale;
imageScrollView.zoomScale = minimumScale;
[imageScrollView setContentMode:UIViewContentModeScaleAspectFit];
[imageView sizeToFit];
[imageScrollView setContentSize:CGSizeMake(imageView.frame.size.width, imageView.frame.size.height)];
}
我尝试了一切,但没有成功!
我认为这是有框架的东西,但我不知道是什么。
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