48 lines
1.4 KiB
Swift
48 lines
1.4 KiB
Swift
//
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// Copyright (c) 2017 Open Whisper Systems. All rights reserved.
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//
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import Foundation
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extension UIApplication {
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var frontmostViewControllerIgnoringAlerts: UIViewController? {
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return findFrontmostViewController(ignoringAlerts:true)
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}
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var frontmostViewController: UIViewController? {
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return findFrontmostViewController(ignoringAlerts:false)
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}
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internal func findFrontmostViewController(ignoringAlerts: Bool) -> UIViewController? {
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let window = UIApplication.shared.keyWindow
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var viewController = window!.rootViewController
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while true {
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if let nextViewController = viewController?.presentedViewController {
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if ignoringAlerts {
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if nextViewController as? UIAlertController != nil {
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break
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}
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}
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viewController = nextViewController
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} else if let navigationController = viewController as? UINavigationController {
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if let nextViewController = navigationController.topViewController {
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viewController = nextViewController
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} else {
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break
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}
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} else {
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break
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}
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}
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return viewController
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}
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func openSystemSettings() {
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openURL(URL(string: UIApplicationOpenSettingsURLString)!)
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}
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}
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