我有一个UIView与我在哪里加载图像到子视图滚动和分页启用,它工作正常。现在我加入捏合手势来放大的图像,它的工作,但有一些问题:UIScrollView和UIPinchGestureRecognizer
- 我似乎被放大了整个滚动视图,不仅图像
- 我想限制变焦到图像的原始尺寸,现在我可以缩小图像的大小,并使图像变得非常小,然后很难缩小图像。
- 当我放大时,我无法滚动。
下面的代码:
NSDictionary *dictionary = [tmpAppDelegate.data objectForKey:selectedTitle];
NSArray *MenuImageArr = [[NSArray alloc] init];
MenuImageArr = [dictionary objectForKey:@"MenuArr"];
NSMutableArray *menuImages = [[NSMutableArray alloc] init];
scrollView.delegate = self;
// loop through all names from the plist and add image to the array
for (NSInteger i = 0; i < [MenuImageArr count]; i++) {
NSString *name = [MenuImageArr objectAtIndex:i];
[menuImages addObject:[UIImage imageNamed:[NSString stringWithFormat:@"%@_%@", selectedTitle, name]]];
}
for (int i = 0; i < menuImages.count; i++) {
CGRect frame;
frame.origin.x = self.scrollView.frame.size.width * i;
frame.origin.y = 0;
frame.size = self.scrollView.frame.size;
subview = [[UIImageView alloc] initWithFrame:frame];
subview.image = [menuImages objectAtIndex:i];
[self.scrollView addSubview:subview];
}
self.pageControl.numberOfPages = menuImages.count;
self.scrollView.contentSize = CGSizeMake(self.scrollView.frame.size.width * menuImages.count, self.scrollView.frame.size.height);
}
- (void)scrollViewDidScroll:(UIScrollView *)sender {
// Update the page when more than 50% of the previous/next page is visible
CGFloat pageWidth = self.scrollView.frame.size.width;
int page = floor((self.scrollView.contentOffset.x - pageWidth/2)/pageWidth) + 1;
self.pageControl.currentPage = page;
}
- (IBAction)changePage {
// update the scroll view to the appropriate page
CGRect frame;
frame.origin.x = self.scrollView.frame.size.width * self.pageControl.currentPage;
frame.origin.y = 0;
frame.size = self.scrollView.frame.size;
[self.scrollView scrollRectToVisible:frame animated:YES];
pageControlBeingUsed = YES;
}
- (IBAction)handlePinch:(UIPinchGestureRecognizer *)recognizer {
recognizer.view.transform = CGAffineTransformScale(recognizer.view.transform, recognizer.scale, recognizer.scale);
recognizer.scale = 1;
}
我不知道如何处理这些问题继续进行。
你为什么不使用一个UIWebView(而不是滚动型),并把图像中出现(如HTML),然后你会得到所有的捏和缩放和滚动功能,内置的。:) – 2012-03-14 15:37:30
好吧,我用滚动视图因为我希望启用分页功能,并认为这是要走的路。但也许我应该考虑使用webview来代替。现在,我将来自plist的X张图像加载到分页的子视图中。但我可以在webview中将它们加载到eachother的顶部,并向下滚动而不是分页。我会看看它是怎么回事,thanx :-) – KeLLoGsX 2012-03-16 07:06:49