Im trying to add a welcome screen to my app that you "slide to unlock". The idea is very simple to the Potluck app. Essentially the user would slide the view and as they slide they will see the next view underneath the view they are sliding. When they slide past a certain point it goes to the next view. I'm trying to do this with UIPanGestureRecognizer. I'm assuming I need to find how far the user has dragged out the screen, which I'm not sure how to do. Thanks.
I found the effect Im trying to achieve online in a gif:
https://d262ilb51hltx0.cloudfront.net/max/800/1*tKuXa5qf4aSwuSnv05uqxQ.gif
You could use UIDynamicAnimator and UIDynamicBehaviors in order to get a realistic result. Although they're only available for iOS 7.
Set up UIGravityBehavior to pull the view towards the right direction.
Then create a UICollisionBehavior to stop the top view falling off the screen.
When the pan gesture starts, remove the gravity and attach a UIAttachmentBehavior to the center of the top view. As the pan moves, move the attachment to drag the top view. When the pan gesture is released use the UIPanGestureRecognizer to get the velocity in the view. Give the view a push in the direction of that velocity using UIPushBehavior. Then reapply the gravity in the appropriate direction.
Hope that helps!
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Using Swift 4 in XCode, I have several image views on the screen. I have added a gesture recognizer to one, and am able to move that image around the screen with a pan action.
What I'd like is that when I move that image NEXT to another image view on the screen, it "snaps" into place right next to it. (imagine magnetic lego blocks - and when one gets close to the next one, it snaps and attaches) -- as opposed to, say, being able to drag the movable image on TOP of the static image.
Can anyone guide me toward an answer, as I don't know what this concept is called.
(I'm not really trying to use animation, as it should only move based on a user's swipe.) Any tutorial links would be appreciated! Thanks!
I'm stuck with a problem with pinch gesture. So I have a pinch gesture on an UIImageView which is itself in a collectionView, and when the user starts zooming, I add new, separates ViewController to control the zoom and pan gestures on the image, so I add my UIImageView to the new ViewController's view. The problem is, when I change my UIImageView hierarchy, the pinch gesture attached to it stops working, so the user has to take off his fingers and start pinch again in order to zoom the image. So basically, I am searching solutions to one off these:
1. Make pinch gesture work right when changing gesture.view hierarchy
OR
2. Make pinch gesture work right when changing gesture.view. So another way is to add a new view to the new ViewController and attach gesture to that view. But it still resets the gesture touches and you need to start it again.
If anyone has any suggestions, please help. Thanks a lot.
Ok, I found the answer. You just need to set userinteraction of vc's view to NO. Works like a charm.
I would like to create a toolbar/navigationbar that appears at the bottom of the screen when the user swipes up on the screen. I would like it to have a bit of resistance in the same way pull to refresh works at the top of a tableview. However I am not using a tableview in my app.
I have tried searching for anything that would point me in the right direction, however the search terms seem to return results either about swiping to delete or facebook style menus.
How would I achieve the swipe up to reveal? Any advice or links to helpful tutorials would be much appreciated
Thanks in advance
Add the menu view to the view but outside of the screen. Add a UIPangestureRecognizer to the view. In the action of the pan recognizer, change the frame of the menu view according to the pan distance.
- The functionality which is required by client is already implemented using UISwipeGestureRecognizer but I am not able to give animation which is needed.
- I want the animation of dragging image as its in paging effect of UIScrollview.
Let me explain in detail:
- In UIScrollView with paging enabled, when we drag image, it will be dragged behind our finger not just slight swipe.
- In my case its moving away as soon as the finger moves over the image, so I want the animation of image to be sliding as far as my fingers moves and on leaving it should move away.
-Friends, I don't want curl effect but I only want swipping functionality as far as my finger moves.
I think you can take a look at this repository and you can find what you need if you edit this repository code and use PanGestureRecognizer instead of SwipeGestureRecognizer in this repository.
https://github.com/agrawalmahesh/MKImageSlideshow
You need to disable paging property of the UIScrollView.
I have a UIPageViewController which manages UINavigationControllers, which are hooked up to a UITableView. I want the user to be able to swipe between the different "table views", which currently works. When the user swipes on the first or last page, the controller moves off the screen and there is black behind it. I don't want the user to be able to swipe off the screen.
I tried using gesture recognizers to prevent pan and swipe gestures in a certain direction when the user was at the first or last page but when I returned NO in gestureRecognizer:shouldReceiveTouch: the view was still able to scroll.
In the end I am trying to emulate how "snapchat" works, I don't mind using a different method to achieve what they have I just am unsure how I would do it.
You can try setting background color on the superview to white or the color of your tableview.
I finally figured out an easy semi-fix. I decided to take a screenshot and use the clone tool to get rid of all the labels and I set it as the background image of the UIPageView. Now at least it doesn't look black, it just looks like the tableview continues off the screen.