51 lines
1.9 KiB
Swift
51 lines
1.9 KiB
Swift
//
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// AdaptiveStatusBarStyleNavigationController.swift
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//
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//
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// Created by MainasuK Cirno on 2021-2-26.
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//
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import UIKit
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// Make status bar style adaptive for child view controller
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// SeeAlso: `modalPresentationCapturesStatusBarAppearance`
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class AdaptiveStatusBarStyleNavigationController: UINavigationController {
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private lazy var fullWidthBackGestureRecognizer = UIPanGestureRecognizer()
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override var childForStatusBarStyle: UIViewController? {
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visibleViewController
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}
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}
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// ref: https://stackoverflow.com/a/60598558/3797903
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extension AdaptiveStatusBarStyleNavigationController {
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override func viewDidLoad() {
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super.viewDidLoad()
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setupFullWidthBackGesture()
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}
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private func setupFullWidthBackGesture() {
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// The trick here is to wire up our full-width `fullWidthBackGestureRecognizer` to execute the same handler as
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// the system `interactivePopGestureRecognizer`. That's done by assigning the same "targets" (effectively
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// object and selector) of the system one to our gesture recognizer.
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guard let interactivePopGestureRecognizer = interactivePopGestureRecognizer,
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let targets = interactivePopGestureRecognizer.value(forKey: "targets")
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else { return }
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fullWidthBackGestureRecognizer.setValue(targets, forKey: "targets")
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fullWidthBackGestureRecognizer.delegate = self
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view.addGestureRecognizer(fullWidthBackGestureRecognizer)
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}
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}
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// MARK: - UIGestureRecognizerDelegate
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extension AdaptiveStatusBarStyleNavigationController: UIGestureRecognizerDelegate {
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func gestureRecognizerShouldBegin(_ gestureRecognizer: UIGestureRecognizer) -> Bool {
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let isSystemSwipeToBackEnabled = interactivePopGestureRecognizer?.isEnabled == true
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let isThereStackedViewControllers = viewControllers.count > 1
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return isSystemSwipeToBackEnabled && isThereStackedViewControllers
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}
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}
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