uiscrollview

问题 I've been trying to create a UIScrollView for user registry but with no success. I'm using auto layout and all of the fields that go inside the scroll view are static. Because of the usual ambiguous height issue, I've added a UIView inside the scroll view, set the constraints to the margins of the scroll view and centered aligned it. After that I added all of the fields inside that Content View, in the storyboard. The content fields have their constraints setup as you would expect, but when I

问题 I have a custom horizontal collection view that has 1 row and I want to add pull to refresh functionality which, by default, appears above my row of cells. I would like the user to be able to pull the collection view from left to right to activate the UIRefreshControl. Any ideas? 回答1: For this you need to implement the UIScrollViewDelegate method - (void)scrollViewDidScroll:(UIScrollView *)scrollView { CGPoint offset = scrollView.contentOffset; CGRect bounds = scrollView.bounds; CGSize size =

问题 I have a simple UIViewController with a UITableView as its view 's subview . I want to have the option to hide the tableViewHeader of my tableview. This is working fine - I can adjust the content offset with the height of the headerView and its all good. However, when I am to transition to a new VC (by pushing) - during the transition animation the tableView's contentOffset gets reset to {0,0} - essentially showing the header view. Is there a way I can keep the contentOffset of the tableView

问题 I have a simple UIViewController with a UITableView as its view 's subview . I want to have the option to hide the tableViewHeader of my tableview. This is working fine - I can adjust the content offset with the height of the headerView and its all good. However, when I am to transition to a new VC (by pushing) - during the transition animation the tableView's contentOffset gets reset to {0,0} - essentially showing the header view. Is there a way I can keep the contentOffset of the tableView

问题 For testing purpose I have create project where I have two scrollview. First scrollview have images that I inserted manually and in second scrollview I have list of buttons (as menu). I have button as right and left to scroll UIScrollView programmatically. After clicking this button I was moving scrollview by setting content size. myCounter.text = [NSString stringWithFormat:@"%d", [myCounter.text intValue] - 1]; CGRect page = CGRectMake(320*([myCounter.text intValue] ), 230, 320, 150);

问题 For testing purpose I have create project where I have two scrollview. First scrollview have images that I inserted manually and in second scrollview I have list of buttons (as menu). I have button as right and left to scroll UIScrollView programmatically. After clicking this button I was moving scrollview by setting content size. myCounter.text = [NSString stringWithFormat:@"%d", [myCounter.text intValue] - 1]; CGRect page = CGRectMake(320*([myCounter.text intValue] ), 230, 320, 150);

问题 This question discusses how to create gaps between views in a UIScrollView. The agreed method is to increase the width of UIScrollView's frame to create gaps between the views which will be scrolled past. However when the scroll view is a subview of a UINavigationController an issue arises. The UINavigationController changes the frame of the UIScrollView after it has been set up in -viewDidLoad . The solution proposed is to alter the frame size in -viewDidAppear , at which point

问题 I would like to make a fixed cell at the bottom of the table view in iOS similar to that of leaderboard view of HQ trivia iOS app. Like this: 回答1: To give the impression of a fixed cell, you can simply add a UITableView onto a regular UIViewController , set its constraints so that it consumes the whole view, but stops (for example) 60px from the bottom of the screen. Fill the remaining space with a UIView that has the same UI as the cell ... and thats it, the tableview will scroll, and the

问题 structure UIViewController - UIScrollview - UIButton I'm going to make scrollview can receive button event. So whenever user do scrolling(dragging) on the button, the scrollview react as scrolling itself. I made button down and moved handler with event forwarding like below - (IBAction)buttonTouchedMove:(id)sender withEvent:(UIEvent *)event { [[sender nextResponder] touchesMoved:[event allTouches] withEvent:event]; } - (IBAction)buttonTouchedDown:(id)sender withEvent:(UIEvent *)event { [

问题 Is there a way to programmatically enable a breakpoint? Normally I'd use a breakpoint condition, but I need to use a symbolic breakpoint. Specifically, something is changing the contentOffset of my UIScrollView between a call to scrollToIndexPath and a call to reloadData . I'd like to enable the symbolic breakpoint only after the call to scrollToIndexPath . 回答1: Jim Ingham's answer works on a x86 system. For an iOS device I was able to use the method described in this answer to