64 lines
2.1 KiB
Swift
64 lines
2.1 KiB
Swift
// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v. 2.0. If a copy of the MPL was not distributed with this
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// file, You can obtain one at http://mozilla.org/MPL/2.0/.
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import UIKit
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extension UIAlertController {
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class func showErrorWithMessage(_ message: String, retryBlock: (() -> Void)?) {
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showWithTitle(String(localized: "error_title"), message: message, retryBlock: retryBlock)
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}
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class func showWithTitle(_ title: String, message: String? = nil, retryBlock: (() -> Void)?) {
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let alert = UIAlertController(title: title, message: message, preferredStyle: .alert)
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if let retryBlock = retryBlock {
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alert.addAction(UIAlertAction(title: String(localized: "error_retry_button"), style: .default) { _ in
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retryBlock()
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})
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alert.addAction(UIAlertAction(title: String(localized: "alert_cancel"), style: .cancel, handler: nil))
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}
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else {
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alert.addAction(UIAlertAction(title: String(localized: "error_ok_button"), style: .cancel, handler: nil))
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}
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guard let visible = visibleViewController() else {
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return
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}
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visible.present(alert, animated: true, completion: nil)
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}
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fileprivate class func visibleViewController(_ rootViewController: UIViewController? = nil) -> UIViewController? {
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var root: UIViewController
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if let rootViewController = rootViewController {
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root = rootViewController
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}
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else {
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let appDelegate = UIApplication.shared.delegate as? AppDelegate
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guard let controller = appDelegate?.window?.rootViewController else {
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return nil
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}
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root = controller
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}
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guard let presented = root.presentedViewController else {
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return root
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}
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if let navigation = presented as? UINavigationController {
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return visibleViewController(navigation.topViewController)
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}
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if let tabBar = presented as? UITabBarController {
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return visibleViewController(tabBar.selectedViewController)
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}
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return presented
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}
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}
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