The question is very simple, how to enable scroll and zoom inside a UIScrollView in tvOS?
I tried the same initializer code from iOS and returned the scrollview for the focusedView var, but nothing happens when i touch the remote.
Also, i tried to add another custom UIPanGestureRecognizer to the scrollview and actually it works, but i don't want to handle the pan with custom code, just use the same pan behavior like iOS.
Let me know, thanks.
You can configure the scroll view's built-in pan gesture to recognize touches on the Siri Remote. It doesn't do that automatically, because normally scroll views on tvOS aren't scrolled directly by touches: they're scrolled automatically as focus moves between views within the scroll view.
If you really want the scroll view to move directly from touches, you'll need to add UITouchTypeIndirect to the allowedTouchTypes of the scroll view's panGestureRecognizer:
scrollView.panGestureRecognizer.allowedTouchTypes = #[ #(UITouchTypeIndirect) ];
You'll also need to make sure that either the scroll view itself is the focused view, or is a parent of the focused view, since all touches from the remote will start at the center of the focused view: you need to make sure the scroll view is getting hit-tested for the events to work.
Zooming won't work, because the Siri Remote can only recognize one touch at a time, so you can't do a pinch gesture on it.
Swift 4 version (from here: https://stackoverflow.com/a/41000183/945247)
scrollView.panGestureRecognizer.allowedTouchTypes = [NSNumber(value:UITouchType.indirect.rawValue)]
Related
I have a modal window, which is perfect for iOS 13's drag to dismiss gesture, because this way the user remains in the context, so I don't want to use full screen. The controller contains a UICollectionView which displays a month calendar, which is scrollable vertically.
The problem is, that when the user wants to scroll upwards in the collection view, the dismiss gesture is triggered instead. If I scroll down first, then can I only scroll up.
I've tried to disable the internal UIPanGestureRecognizer (it seems somehow there is no presentedView, so it didn't work), tried to set the UICollectionView's pan gesture recognizer delegate to prevent the system recognizer to fire (it turned out you can't do that), and tried to scroll the collection view on appearing a bit (ugly).
How can I elegantly convince the the modal presentation, that my scrollview isn't scrolled to the top?
All I have an UIImage in an UIView and I have added an UISwipeGestureRecogniser in both IB and in code. Code is like this :
EventImage.addGestureRecognizer(swipeRec)
EventImage.userInteractionEnabled = true
swipeRec.addTarget(self, action: "swipedView")
It will read a 'right' swipe fine, but I want to control a down swipe.
The UImage is in an View and the View is a part of a scrollview. So I have switched off DirectionLock and Bounces. So the UIView cannot be pushed down from the NAV BAR. And it still doesn't recognise a swipe down.
Any ideas ?
In IB I have created the recogniser by dragging an 'Swipe Gesture Recogniser' on to the image I want to be able to use the gesture.
Then if i select the 'Gesture in IB' I can set which way the gesture goes, and I select down like this :
Then I set an func in swift and it does not recogise down but when I change it to right i works fine.. I have checked the idea by using breakpoints and the breakpoint triggers on Right swipe (and left) but going down doesn't work.
I think it could be because I am in a scroll view.
I have added :
func gestureRecognizer(gestureRecognizer: UIGestureRecognizer, shouldRecognizeSimultaneouslyWithGestureRecognizer otherGestureRecognizer: UIGestureRecognizer) -> Bool {
return true
}
As I thought this may help.
Hope this is clearer.
A UISwipeGestureRecognizer can only recognise swipes in one direction.
That direction is set in the direction property of it.
If you want to swipe right or down then you will need two gesture recognisers. One for the right swipe and one for the down swipe.
recognizer.direction = UISwipeGestureRecognizerDirection.Down
Also, it help to read the documentation. All of this info is directly from there.
UIScrollview scroll is not working when i tested application in device (iPhone 5), But scroll is working properly in iPhone 5/5s/6/6 Plus simulator. I am developing application using Xcode 6 and UIStoryboard with AutoLayout.
I set the top, bottom, left and right constraints of UIScrollview with relative to Superview. And i also set the constraints of every UIControl which is in the UIScrollview.
Has any one have solution regarding this issue?
Please see below screenshot for reference.
It's probably easiest to have the scroll view contain a single view, which then contains all of your scrollable content. That single view should be anchored to all 4 sides of the scroll view, and if it's only meant to scroll vertically (which is what your screenshot makes it look like), then set the content view to be the same width as the parent of the scroll view.
To make sure an UIScrollView scroll, you have to check
Size
Your content View is bigger than your Scroll View. If you want it to be scrolled vertically, make sure its higher; horizontally, wider.
Constraints
Make sure your Scroll View is pinned to its super view, Top, Bottom, Leading, Trailing.
Make sure your Content view of Scroll View DOES NOT have CenterY constraint set to Scroll View, cause that'd make content view stuck with Scroll View and it'd never be able to scroll. (That happens to me the last time I was stuck)
Interface Builder settings
Make sure the check in Interface Builder under Scroll View is checked:
Scrolling section, Scrolling Enabled.
I have UiTableView containing some data, and I want to scroll the UiTableViewCells horizontally to the left or right to show some UiButtons that act some action relatif to the content of the cell.
How Can I do this?
I'm thinking in creating custom cell, and putting a scrollView in it, May this did the trick?
There is a tutorial for this at http://idevrecipes.com/2011/04/14/how-does-the-twitter-iphone-app-implement-side-swiping-on-a-table/ with sample code. He is using a UISwipeGestureRecognizer to trigger an animation that pushes the cell off the screen.
You could use a swipe gesture recognizer attached to your cell.
You can add a UIScrollView to the contentView of a UITableViewCell. If you want to scroll the content using buttons, simply overlay the UIScrollView with buttons and make them call the various scrolling methods of UIScrollView.
Nested UIScrollView (UITableView inherits from UIScrollView) are quite clever about detecting touch conflicts and resolving the users intended gesture.
https://github.com/JonasGessner/JGScrollableTableViewCell might be what you're looking for. It implements this using a UIScrollView inside the cell (just like the iOS 7 mail app).
(Yes the answer is a bit late, but it's never too late! :P)
I am wanting to implement history navigation in my app that mimics the slide away animation found in Safari on Lion and in XCode where a top view slides away at the speed of swipe to reveal the view underneath it.
I was looking for pointers on how to do this. I know how to detect the swipe. I assume I could implement the animation via a CALayer animation slide transition on the top view revealing a view underneath it. Has anybody else done this and can offer some further pointers?
It's a new NSEvent method, -trackSwipeEventWithOptions:.... You should call it from within your regular scroll/swipe event handler, whenever you decide the gesture should begin. Unfortunately it doesn't automatically handle the page animations — it just gives you updates with the gesture amount, and you have to do the animations yourself (using layers or views or somesuch). You'll probably want to save images of each page so you can animate them around during a gesture.