uiscrollview

问题 My app is has a feature in which you answer questions about people you are following, such as (Option A, B, C, D are where the names for the users will be): The idea is that you answer a question about a user and it randomly shuffles from the people you are following from the firebase database. The images are the profile pictures that a user uploads when signing up and they are shown in order from the top left, top right, bottom left, bottom right of whoever is in the answer of the question.

问题 Here's a scroll view (it is the GRAY area). Content area is yellow. Notice it insets, so that you can scroll the sides of the content over to the middle of the screen. PROBLEM: you can put your finger on the GRAY area and scroll it. I want it to work so that you can ONLY scroll by putting your finger on the yellow content. If you put your finger on the gray "background" and try to scroll it, nothing should happen. How to do this? Yellow content is scrolled fully to the right, it rests here:

问题 I am trying to do a view that contains several collectionViews . Swiping left or right would scroll to another collectionView . I have added a scrollView as a first step with paging enabled . I also set the content size to the number of pages. int nb_of_items = 10; // Scroll view for (int i=0; i< nb_of_items ; i++) { CGRect frame = CGRectMake(_scrollView.frame.size.width * i, 0, _scrollView.frame.size.width, _scrollView.frame.size.height); _collectionView.frame = frame; [_scrollView

问题 I am trying to custom a extension for Parallax Header. However, it's not working perfectly. The table header view always floats and overlaps cells. Extension code: extension UITableView { func addImageHeaderView(headerView headerView: UIView, height: CGFloat) { self.contentInset = UIEdgeInsetsMake(height, 0, 0, 0) self.contentOffset = CGPoint(x: 0, y: -height) self.tableHeaderView = headerView self.tableHeaderView?.frame = CGRect(x: 0, y: 0, width: self.bounds.width, height: height) } func

问题 i am using UIScrollview and UITapGestureRecognizer for getting touch event. Now, i want x and y coordinates for my touch position. any help Please? 回答1: In your gesture recognizer handler: CGPoint location = [gestureRecognizer locationInView:gestureRecognizer.view]; you could specify a different view, if you need it. or u can use this also It belongs in a View rather than ViewController, and would look something like this: -(void)touchesBegan:(NSSet*)touches withEvent:(UIEvent*)evt { UITouch

问题 I have UITextView and a situation that is problematic. I write line of text in the UITextView, and then press return for new line. What happen is, the line that i entered is moving up so i can't see it, and i am able to continue writing. This is bad behavior for me, because i need the line to stay, and only move up when i reach the bottom of the UITextView. I've read other similar posts but they wasn't helpfull. Is someone familiar with this thing? 回答1: I had luck using this solution: How to

问题 I have a UIScrollView and there are many views inside my scroll view. I am using autolayout and all my views are layed out in the same manner: Left and top spacing to the superview, width and height set. Everything scrolls just fine, however my page control stays whereever it is. It does not scroll with the other elements inside the scroll view. YES, I did check that the page control is inside the scroll view just like the other elements, and yes, I've quadruple-checked the constraints of the

问题 In my iphone app i set delegate of my uiwebview to files owner but it is not calling uiscrollviewdelegate methods my code is - (void)webViewDidStartLoad:(UIWebView *)webView{ NSLog(@"webViewDidStartLoad "); } - (void)webViewDidFinishLoad:(UIWebView *)webView{ NSLog(@"webViewDidFinishLoad "); } - (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView{ NSLog(@"scrollViewDidEndDecelerating "); } - (void)scrollViewDidScroll:(UIScrollView *)scrollView{ NSLog(@"scrollViewDidScroll "); } but

问题 I have a UIView inside a UIScrollView , and the UIViewControllers for those views are not receiving the touch events. If I take the views out of the scroll view then it works. UserInteraction is default ON of all views but it's still not working! This must be possible and I'd be really grateful if someone could point me in the right direction! Many Thanks, 回答1: add the following code to implementation file then touches moved @interface UIScrollView(Custom) @end @implementation UIScrollView

问题 I have one UIScrollView inside another UIScrollView , both scrolling vertically. I’m having an issue where when I try to scroll the inner scroll view, the touches are also picked up just afterwards by the outer scroll view. I need touches in the inner scroll view to be exclusively handled by it, and for scrollViewDidScroll to NOT be called on the parent scroll view. I’ve tried all manner of things, subclassing the scroll view and overriding hitTest:withEvent , setting canCancelContentTouches