56 lines
1.7 KiB
Swift
56 lines
1.7 KiB
Swift
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//
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// SecurePasteboard.swift
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// pass
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//
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// Created by Yishi Lin on 2017/7/27.
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// Copyright © 2017 Bob Sun. All rights reserved.
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//
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import Foundation
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import UIKit
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class SecurePasteboard {
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public static let shared = SecurePasteboard()
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private var backgroundTaskID: UIBackgroundTaskIdentifier? = nil
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func copy(textToCopy: String?, expirationTime: Double = 45) {
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// copy to the pasteboard
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UIPasteboard.general.string = textToCopy ?? ""
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// clean the pasteboard after expirationTime
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guard expirationTime > 0 else {
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return
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}
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// exit the existing background task, if any
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if let backgroundTaskID = backgroundTaskID {
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UIApplication.shared.endBackgroundTask(backgroundTaskID)
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self.backgroundTaskID = nil
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}
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backgroundTaskID = UIApplication.shared.beginBackgroundTask(expirationHandler: { [weak self] in
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guard let taskID = self?.backgroundTaskID else {
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return
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}
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if textToCopy == UIPasteboard.general.string {
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UIPasteboard.general.string = ""
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}
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UIApplication.shared.endBackgroundTask(taskID)
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})
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DispatchQueue.global(qos: .utility).asyncAfter(deadline: .now() + expirationTime) { [weak self] in
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guard let strongSelf = self else {
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return
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}
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if textToCopy == UIPasteboard.general.string {
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UIPasteboard.general.string = ""
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}
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if let backgroundTaskID = strongSelf.backgroundTaskID {
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UIApplication.shared.endBackgroundTask(backgroundTaskID)
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strongSelf.backgroundTaskID = nil
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}
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}
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}
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}
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