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* ✨ Add BackGesture helper * 💚 Hide import behind compiler directive * 📝 Update CHANGELOG.md
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,56 @@ | ||
| #if os(iOS) | ||
| import UIKit | ||
|
|
||
| private class BackGestureDelegate: NSObject { | ||
| // MARK: - Private properties | ||
|
|
||
| private weak var navigationController: UINavigationController? | ||
|
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| // MARK: Initializers | ||
|
|
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| init( | ||
| navigationController: UINavigationController | ||
| ) { | ||
| super.init() | ||
| self.navigationController = navigationController | ||
| } | ||
| } | ||
|
|
||
| // MARK: - UIGestureRecognizerDelegate | ||
| extension BackGestureDelegate: UIGestureRecognizerDelegate { | ||
| func gestureRecognizerShouldBegin(_ gestureRecognizer: UIGestureRecognizer) -> Bool { | ||
| navigationController.map { $0.viewControllers.count > 1 } ?? false | ||
| } | ||
| } | ||
|
|
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| extension UINavigationController { | ||
| private enum Keys { | ||
| static var backGestureDelegate: UInt8 = 0 | ||
| } | ||
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| private var backGestureDelegate: BackGestureDelegate { | ||
| if let delegate = objc_getAssociatedObject(self, &Keys.backGestureDelegate) as? BackGestureDelegate { | ||
| return delegate | ||
| } | ||
|
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| let delegate = BackGestureDelegate(navigationController: self) | ||
| objc_setAssociatedObject( | ||
| self, | ||
| &Keys.backGestureDelegate, | ||
| delegate, | ||
| .OBJC_ASSOCIATION_RETAIN | ||
| ) | ||
| return delegate | ||
| } | ||
|
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| /// Add custom interactivePopGestureRecognizer delegate so it works even with hidden navigationBar | ||
| public func setupCustomBackGestureDelegate() { | ||
| assert(isViewLoaded, "View needs to be already loaded") | ||
| assert( | ||
| interactivePopGestureRecognizer != nil, | ||
| "Cannot install gesture delegate on nil recognizer" | ||
| ) | ||
| interactivePopGestureRecognizer?.delegate = backGestureDelegate | ||
| } | ||
| } | ||
| #endif |