I am developing a game where the user could draw using up to 5 fingers, 1 finger for each line.
When multitask gesture is enabled and the user try to draw using more than 4 fingers from right to left, the gesture recognizer from iOS on iPad switch to another application.
How can I programmatically disable this recognizer when the user enters on my application?
There is no API for that.
There might be a way to consume the gesture, so it is not forwarded to the system, but I think the order of the messaging chain is in the other way.
You can only ask your users to disable the Multitasking Gestures in the System Preferences, under the General section. Not really great, I know.
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How do I receive raw touch events on iOS for creating my own gestures using my own state machine? I'm looking for the analogue of Android's MotionEvent for multi-touch gestures. I need to be able to draw on the background box, but I do not need OS components on this box.
iOS provides a gesture recognizer for defining custom gestures, and it defines UITouch objects that deliver to the application. However, the former is incapable of the implementing the complexity of my system, particularly at the efficiency I need, and the latter does preprocessing, such as to determine the tapCount. My system must itself decide whether a touch is a tap or not.
Additionally, I need to ascertain for myself whether multiple simultaneously-touching fingers form a gesture or not. I can't have iOS interpreting four-finger gestures input (exclusively) on top of my viewing area, though I could live with iOS interpreting five-finger gestures. It's okay for iOS to preempt control from my view if any finger of the gesture starts outside of the view.
The application is a gesturing alternative to the keyboard, so it would ideally be able to operate in the keyboard area, in case this affects the answer.
Is this possible on iOS? What's the approach? I'd like to write a simple program outputting touch events to prove it can be done. Thanks for your help!
UPDATE: I was largely able to answer the question by playing with the Multitouch Visualizer app. Each tap is registered as it occurs, and gestures of 4 fingers or fewer appear to be received without iOS interfering. iOS takes over for some 5 finger gestures, but only if they satisfy certain (unknown) initial characteristics. I don't know how this is done, but I imagine via UITouch events.
I have a collection view in my app, which is inside a table view cell (yes I know it's weird), and I want to UI Test the scrolling of the collection view. I use the recording button for this, however Xcode identifies the swiping on my collection view as taps. If I manually change the generated UI Test code from [collectionview tap] to [collectionview scrollLeft], it works, but Xcode won't generate the code for swiping automatically.
What could be the problem?
Xcode only recognises a gesture as a swipe if your trajectory with the gesture is fast, straight and true to the (up/down/left/right) direction you are swiping in.
My guess is that this prevents recording drag or tap-and-hold gestures as swipes, since these are unsupported by the recording tool. If you were going for either of those, a tap gesture would be closer.
As a workaround, take note of where you expected a swipe and switch the gesture as you have been doing when your swipes aren't recorded.
I believe you should file a bug with Apple and include a sample project.
It may be hard for the recording system to differentiate between a tap, a long press, and a swipe. While I've seen the recording of tap events to be reliable, I find I'm manually typing any steps for swipes or typeText. Generally I use the UI test recording feature to help with identification of particular elements, which I then work with in code to specify the user interactions and asserts.
If you want to create a sample project on github or somewhere with your collectionView-inside-tableViewCell configuration, I'd be willing to take a look.
EDIT: After trying your example project, I was sometimes able to get Xcode to record swipeLeft and swipeRight events from the first cell. It's not the most elegant approach, but with the trackpad on my MacBook Air, I start a horizontal swipe with one finger without pressing the mouse button, and then press the button with another finger while the first finger is still swiping.
There were some instances when Xcode recorded this simply as a tap, and at least one instance where it recorded a twoFingerTap.
I am building an app which will be displayed on an iPad. It will be an app for customers in the shop who will be able to leave their contact data. I am going to put an iPad to a frame so they won't be able to press home, lock buttons. Just the screen.
My question is: is there any way to prevent them from closing my app by a gesture? (fingers going closer to each other) or a gesture of switching apps? (3 fingers swipe left/right)
I suppose I can set it in settings, but I really need it to be set in the code.
Does iOS system provides that feature (disabling system gestures programically?)
Thank you
We have a palm scanning app and occasionally putting the palm on the app gets read as a 5 finger pinch or opposite of pinch gesture, which exits the app. Is there some way we can make it work?
I had completely missed the multitasking gestures setting which solves this in our case.
I want to develop an ipad app for babies, i have noticed that when a baby uses an ipad, she will use many fingers, making the gestures for the ipad activate, like switch activities, check springboard, or close activity, or notifications
How can i disable this gestures in my app? (then i will implement my own gestures)
So is possible to disable the default gestures?
Thanks!
Disabling the default gestures is not possible, you can only disable them from settings but still you can make up your own gestures
But keep in mind that system global gestures will have higher priority on your own gestures