Related
I'm targeting iOS7 in my latest app, and tapping on the status bar doesn't seem to scroll a tableView or collectionView to the top.
I've set self.tableView.scrollsToTop = true and still nothing happens.
I know Apple significantly changed the status bar in iOS7, but did those changes break the scrollsToTop functionality?
Update
In response to a comment in one of the answers, I tested to ensure that my collection view was indeed the only scrollView on the screen, and it was:
(lldb) po [self.view recursiveDescription]
<UIView: 0x1092ddf0; frame = (0 0; 320 568); autoresize = W+H; layer = <CALayer: 0x109357e0>>
| <UICollectionView: 0x11351800; frame = (0 0; 320 568); clipsToBounds = YES; opaque = NO; autoresize = W+H; gestureRecognizers = <NSArray: 0x10966080>; layer = <CALayer: 0x109623a0>; contentOffset: {0, -64}> collection view layout: <UICollectionViewFlowLayout: 0x10940a70>
| | <UIImageView: 0x10965fa0; frame = (0 564.5; 320 3.5); alpha = 0; opaque = NO; autoresize = TM; userInteractionEnabled = NO; layer = <CALayer: 0x10965ee0>> - (null)
| | <UIImageView: 0x10948f60; frame = (316.5 561; 3.5 7); alpha = 0; opaque = NO; autoresize = LM; userInteractionEnabled = NO; layer = <CALayer: 0x10966030>> - (null)
Update #2
Not sure if it matters, but I'm using a standard iOS7 NavigationController where the navigationBar is transparent and applies a blur to my collection/tableViews as they scroll underneath.
Update #3
Figured it out. Turns out I did have more than one scrollView on the screen. My app has a left drawer menu underneath the main part of the app, and that menu has a tableView for the options. I simply set self.menuTable.scrollsToTop = false and everything worked as expected throughout the rest of the app. Didn't have to implement the scrollView Delegate methods or anything.
Do you have more than one scroll view/table view/collection view on screen? If so, only one of them can have scrollsToTop set to YES, otherwise iOS7 will not scroll any of them to the top.
You can also implement the UIScrollViewDelegate method scrollViewShouldScrollToTop: and return YES if the passed in scroll view is equal to the one that you want to scroll to the top:
- (BOOL) scrollViewShouldScrollToTop:(UIScrollView*) scrollView {
if (scrollView == self.myTableView) {
return YES;
} else {
return NO;
}
}
The short answer is there's nothing different in iOS7. As long as there isn't more than one UIScrollView loaded, your tableView or collectionView will scroll to the top when the user taps the status bar. The key here is loaded; another scrollView doesn't necessarily have to be on screen to conflict with another scrollView that is.
Sliding drawers in the left/right are very popular these days, and this was the reason for my problem. I have a menu containing my navigation options, and these are all held by a UITableView. I had to make sure that I set menuTable.scrollsToTop = false before I could get things working in the other parts of my app.
My problem was that I had a UITextView with scrollsToTop set to YES, so my UITableView wasn't responding to the gesture. In short, make check all other scrollable views.
for others :
Remember that the scroll view you are searching can also be a UIWebView..not just UITableView.
Another important thing is that it's not only about VISIBLE scrollViews, but LOADED scrollviews.
If you don't find the scrollView, you can always
insert UITableView test table, immediately when app is starting, check if it's scroll to top,
and then load more and more views, until the test table stop scrolling to top.
If your table cells are dynamic, remove the following:
- (BOOL)scrollViewShouldScrollToTop:(UIScrollView *)scrollView
{
return YES;
}
Create a new function as follows:
- (void) disableScrollsToTopPropertyOnAllSubviewsOf:(UIView *)view {
for (UIView *subview in view.subviews) {
if ([subview isKindOfClass:[UIScrollView class]]) {
((UIScrollView *)subview).scrollsToTop = NO;
}
[self disableScrollsToTopPropertyOnAllSubviewsOf:subview];
}
}
Call the function above in - (void)viewDidLoad
[self disableScrollsToTopPropertyOnAllSubviewsOf:self.view];
Now enable ScrollsToTop for your table view as follows:
[myTableView setScrollsToTop:YES];
This always works for me:
[self.tableView scrollRectToVisible:CGRectMake(0, 0, 1, 1) animated:YES];
I have a UIScrollView (with paging) to which I add three UIViews. Each of these UIViews has a UITableView inside. So, the user should be able to scroll horizontally to the page he wants and then scroll vertically in the corresponding table.
However, some of the tables don't receive the scrolling gestures. Usually the first one does behave good, but the other ones do not. I can't select cells nor scroll the table up or down.
I used the default settings for the UIScrollView, except for these ones defined in the viewDidLoad:
- (void)viewDidLoad
{
[super viewDidLoad];
//Load the view controllers
[self loadViewControllers];
//Configure the scroll view
self.scrollView.pagingEnabled = YES;
self.scrollView.contentSize = CGSizeMake(CGRectGetWidth(self.scrollView.frame) * viewControllers.count, CGRectGetHeight(self.scrollView.frame));
self.scrollView.showsHorizontalScrollIndicator = NO;
self.scrollView.showsVerticalScrollIndicator = NO;
self.scrollView.scrollsToTop = NO;
self.scrollView.delegate = self;
//Configure the page control
self.pageControl.numberOfPages = viewControllers.count;
self.pageControl.currentPage = 0;
}
I can't figure out why I can't scroll some of the tables... Any help would be greatly appreciated.
Thanks in advance!
Try to set
self.scrollView.delaysContentTouches = YES;
self.scrollView.canCancelContentTouches = NO;
Maybe the UIScrollView don't pass touch informations to the subviews.
I tried to reproduce a simplified version of your needs using basically Interface Builder and it seems to me it's working using basic coding and using default settings. Can you pls check my quick n dirty Github repo and kindly ask to reply whether it is applicable to your situation or what is missing.
https://github.com/codedad/SO_ScrollView_with_Tables
By default Interface Builder creates UIScrollView and UITableViews enabling:
Delays Content Touches ON
Cancellable Content Touches ON
Things I would check:
Check your View Hierarchies - Is something being laid on top of your UITableView, causing it not to receive a tap?
Are your UITableViews being disabled anywhere? I would set a breakpoint in tableView:didSelectRowAtIndexPath: and see if that method is being called.
Check this post
I guess those aren't sure-fire answers but hopefully they'll help discover the problem!
This worked for me
I programmatically added the tableView to my scroll view using addSubview:
UIGestureRecognizerDelegate is needed.
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch {
if ([touch.view isDescendantOfView:self.signUpJammerList]) {
return NO;
}
return YES;
}
How can I disable vertical scrolling in my UITextView? I want it to basically just scroll horizontally.
In some circumstances, when trying to clamp down on unwanted UITextView scrolling I have found it helpful to add something like the following to the UITextView delegate (this is a UIScrollView delegate method but, of course, UITextView inherits from UIScrollView). This might work for you.
- (void)scrollViewDidScroll:(id)scrollView
{
CGPoint origin = [scrollView contentOffset];
[scrollView setContentOffset:CGPointMake(origin.x, 0.0)];
}
What about the scrollEnabled property? Setting the scrollEnabled property to NO stops the user from scrolling (in both directions), but there are occasions where the system sends setContentOffset:animated: messages to a UITextView. The scrollEnabled property applies to both vertical and horizontal scrolling. Given your question, you might want to leave scrollEnabled as is.
You can change it from Xcode -
Solution for disabling vertical scrolling for Swift 4:
func scrollViewDidScroll(_ scrollView: UIScrollView) {
let origin: CGPoint = scrollView.contentOffset
scrollView.contentOffset = CGPoint(x: origin.x, y: 0.0)
}
If you have your custom textView subclass, you can override -gestureRecognizerShouldBegin to disable the scroll.
-(BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer
{
if ([gestureRecognizer isKindOfClass:[UIPanGestureRecognizer class]])
{
if (gestureRecognizer.view == self)
{
return NO;
}
else
{
return [super gestureRecognizerShouldBegin: gestureRecognizer];
}
}
}
why not just use a UITextField if you dont want vertical scrolling?
Just set the contentSize to the height of the view.
You'll use this:
CGSize scrollableSize = CGSizeMake(widthOfContent, heightOfView);
[myScrollView setContentSize:scrollableSize];
place your UITextView in a UIScrollView.
Set your UITextView.frame to a Size the complete Text fits in a Line and set the contenSize of the ScrollView to the size of your UITextView.frame.
Cheers
nettz
How do I set uitableView not to scroll So that it is fixed with two rows
Use:
tableView.scrollEnabled = NO;
if you wish to fix the size you sould set the frame to be for 2 row's size:
tableView.frame = CGRectMake(x_position,y_position,width,height);
good luck
use this code:
tableView.scrollEnabled = NO;
I have a UIScrollView that shows vertical data, but where the horizontal component is no wider than the screen of the iPhone. The problem is that the user is still able to drag horizontally, and basically expose blank sections of the UI. I have tried setting:
scrollView.alwaysBounceHorizontal = NO;
scrollView.directionalLockEnabled = YES;
Which helps a little, but still doesn't stop the user from being able to drag horizontally. Surely there is a way to fix this easily?
scrollView.bounces = NO;
Worked for me.
That's strange, because whenever I create a scroll view with frame and content size within the bounds of the screen on either dimension, the scroll view does not scroll (or bounce) in that direction.
// Should scroll vertically but not horizontally
UIScrollView *scrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, 320, 480)];
scrollView.contentSize = CGSizeMake(320, 1000);
Are you sure the frame fits completely within the screen and contentSize's width is not greater than the scroll view's width?
The checkbox for bounce vertically in storyboard-scrollview can simply help...
That works for me in Swift:
scrollView.alwaysBounceHorizontal = false
scrollView.bounces = false
Try setting scrollView.bounces to NO and scrollView.alwaysBounceVertical to YES.
Whether or not a view scrolls (and bounces) horizontally depends on three things:
The content size
The left and right content insets
The width of the scroll view -
If the scroll view can fit the content size plus the insets then it doesn't scroll or bounce.
Avoid horizontal bouncing like so:
scrollView.contentSize = CGSizeMake(scrollView.frame.size.width - scrollView.contentInset.left - scrollView.contentInset.right, height);
I am adding this answer because the previous ones did not take contentInset into account.
Make sure the UIScrollView's contentSize is not wider than the UIScrollView itself. In my own apps this was enough to avoid horizontal scrolling, except in cases where I got really crazy swiping in random directions (e.g., starting a scroll while the view was still decelerating).
If anyone developing for OS X is looking here, as of OS X 10.7, the solution is to set the horizontalScrollElasticity property to false/NO on the scroll view, like this:
Swift:
scrollView.horizontalScrollElasticity = false
Objective-C:
scrollView.horizontalScrollElasticity = NO
Something to keep in mind: You know there's nothing extra to see horizontally, but will your users know that? You may want a little horizontal bounce, even if there's no extra content to show horizontally. This let's the user know that their attempts to scroll horizontally are not being ignored, there's just nothing there for them to see. But, yeah, often you really don't want the bounce.
My version for webViews, a common solution:
- (void)webViewDidFinishLoad:(UIWebView *)webView {
[webView.scrollView setContentSize: CGSizeMake(webView.frame.size.width, webView.scrollView.contentSize.height)];
}
You can disable horizontal bounces like this:
- (void)scrollViewDidScroll:(UIScrollView *)scrollView {
if (scrollView.contentOffset.x < 0) {
scrollView.contentOffset = CGPointMake(0, scrollView.contentOffset.y);
} else if (scrollView.contentOffset.x > scrollView.contentSize.width) {
scrollView.contentOffset = CGPointMake(scrollView.contentSize.width, scrollView.contentOffset.y);
}
}
It resets the contentOffset.x manually and won't affect the vertical bounces. It works...
In my case, i just need to set this line:
collectionView.bounces = false