Disable iOS Reachability Swipe Gesture in iOS Game

How can I disable iOS Reachability Swipe Gesture in SwiftUI

As Asperi Mentioned. SwiftUI have answer for this in iOS 16+.

Apple documentation

in my case I just add

.defersSystemGestures(on: bottom)

How to prevent accident swipe in iOS game

You can defer the gestures with

//Tell the system you prefer deferring
override func preferredScreenEdgesDeferringSystemGestures() -> UIRectEdge {

    return [.bottom] //Whatever side you want to defer, see UIRectEdge() https://developer.apple.com/documentation/uikit/uirectedge
}

Then call setNeedsUpdateOfScreenEdgesDeferringSystemGestures() when you want the preferredScreenEdgesDeferringSystemGestures to fire.

With this you can now absorb the gesture first and decide whether or not you want to pass it on.

References:

https://developer.apple.com/documentation/uikit/uiviewcontroller/2887507-setneedsupdateofscreenedgesdefer

https://developer.apple.com/documentation/uikit/uiviewcontroller/2887512-preferredscreenedgesdeferringsys

https://developer.apple.com/documentation/uikit/uirectedge

Tutorial:

https://useyourloaf.com/blog/avoiding-conflicts-with-system-gestures-at-screen-edges/

Disable gesture to pull down form/page sheet modal presentation

In general, you shouldn't try to disable the swipe to dismiss functionality, as users expect all form/page sheets to behave the same across all apps. Instead, you may want to consider using a full-screen presentation style. If you do want to use a sheet that can't be dismissed via swipe, set isModalInPresentation = true, but note this still allows the sheet to be pulled down vertically and it'll bounce back up upon releasing the touch. Check out the UIAdaptivePresentationControllerDelegate documentation to react when the user tries to dismiss it via swipe, among other actions.

If you have a scenario where your app's gesture or touch handling is impacted by the swipe to dismiss feature, I did receive some advice from an Apple engineer on how to fix that.

If you can prevent the system's pan gesture recognizer from beginning, this will prevent the gestural dismissal. A few ways to do this:

1. If your canvas drawing is done with a gesture recognizer, such as your own UIGestureRecognizer subclass, enter the began phase before the sheet’s dismiss gesture does. If you recognize as quickly as UIPanGestureRecognizer, you will win, and the sheet’s dismiss gesture will be subverted.

2. If your canvas drawing is done with a gesture recognizer, setup a dynamic failure requirement with -shouldBeRequiredToFailByGestureRecognizer: (or the related delegate method), where you return NO if the passed in gesture recognizer is a UIPanGestureRecognizer.

3. If your canvas drawing is done with manual touch handling (e.g. touchesBegan:), override -gestureRecognizerShouldBegin on your touch handling view, and return NO if the passed in gesture recognizer is a UIPanGestureRecognizer.

With my setup #3 proved to work very well. This allows the user to swipe down anywhere outside of the drawing canvas to dismiss (like the nav bar), while allowing the user to draw without moving the sheet, just as one would expect.

I cannot recommend trying to find the gesture to disable it, as it seems to be rather dynamic and can reenable itself when switching between different size classes for example, and this could change in future releases.

Disable gesture recognizer iOS

The four- and five- finger gestures are not officially part of iOS, and may never be.

Though it would be best to figure out an alternative, you should be able to use these gestures for now and not fear conflicts (save on the iPads of developers who have specifically turned on this feature, whose users know that said features may conflict with apps.)

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