计时器倒计时6小时，到达计时时停止，按下按钮后再启动6小时。
计时器倒计时6小时，到达计时时停止，按下按钮后再启动6小时。
提问于 2020-10-08 05:52:05
我需要一个计时器来倒数6个小时。
到达时间时，.It必须重置
当按下按钮时，必须激活.It。
.It必须在应用程序打开或关闭时继续运行。
我有一个倒计时计时器到一个日期和另一个倒计时计时器，只有在应用程序是活跃的工作。
我如何做一个计时器，计数6个小时？
计时器倒计时到日期⬇︎
var timeCount: NSDate?
var timer = Timer()
timer = Timer.scheduledTimer(timeInterval: 1, target: self, selector: #selector(countdown), userInfo: nil, repeats: true)
@objc func countdown()
{
let endTime = "08-10-2020 18:00:00"
let formatter = DateFormatter()
formatter.dateFormat = "dd-MM-yyyy HH:mm:ss"
timeCount = (formatter.date(from: endTime))! as NSDate
let currentDate = Date()
let calendar = Calendar.current
let diffDateComponents = calendar.dateComponents([.hour, .minute, .second], from: currentDate, to: timeCount! as Date)
let countdown = "\(diffDateComponents.hour ?? 0):\(diffDateComponents.minute ?? 0):\(diffDateComponents.second ?? 0)"
let hourS = diffDateComponents.hour!
let minuteS = diffDateComponents.minute!
let secondS = diffDateComponents.second!
print(countdown)
if countdown == "0:0:0"
{
button.setTitle("PRESS", for: .normal)
button.backgroundColor = .green
timer.invalidate()
}
else
{
button.setTitle("PRESS WHEN TIME RUNS OUT" + "\n\(String(format: "%02d:%02d:%02d", hourS, minuteS, secondS))", for: .normal)
button.backgroundColor = .red
}
}只在应用程序是活动的⬇︎时计时器倒计时
var timer = Timer()
var hours = 06
var minutes = 00
var secs = 00
timer = Timer.scheduledTimer(timeInterval: 1, target: self, selector: #selector(countdown), userInfo: nil, repeats: true)
@objc func countdown()
{
secs = secs-1
if (secs<0)
{
secs = 59
minutes=minutes-1
if (minutes<0)
{
minutes = 59
hours = hours-1
if (hours<0)
{
hours = 0
minutes = 0
secs = 0
timer.invalidate()
}
}
}
var hourp: String
var minutesp: String
var secp: String
if(hours<10)
{
hourp = "0" + String(describing: hours)
}
else
{
hourp = String(describing: hours)
}
if(minutes<10)
{
minutesp = "0" + String(describing: minutes)
}
else
{
minutesp = String(describing: minutes)
}
if(secs<10)
{
secp = "0" + String(describing: secs)
}
else
{
secp = String(describing: secs)
}
let timing = hourp + ":" + minutesp + ":" + secp
print(timing)
if hours == 0 && minutes == 0 && secs == 0
{
button.setTitle("PRESS", for: .normal)
button.backgroundColor = .green
else
{
button.setTitle("PRESS WHEN TIME RUNS OUT" + "\n\(timing)" , for: .normal)
button.backgroundColor = .red
}
}回答 2
Stack Overflow用户
回答已采纳
发布于 2020-10-12 03:18:27
这就是我最终不得不做的事情，这样我才能如愿以偿。
多亏了@Burak K se的回答，他把我引导到了正确的方向。
import UIKit
import Foundation
var timer = Timer()
var currentTime = Date()
var compareTime = Date().addingTimeInterval(-21600)
func setupButtonTitle()
{
if UserDefaults.standard.object(forKey: "count6") == nil
{
button.setTitle("PRESS", for: .normal)
button.backgroundColor = .green
}
else
{
button.setTitle("PRESS" + "\nIN " + "\(startTimer()))" , for: .normal)
}
button.addTarget(self, action: #selector(buttonTap), for: .touchUpInside)
}
func startTimer()
{
timer = Timer.scheduledTimer(timeInterval: 1, target: self, selector: #selector(sixHourCountdown), userInfo: nil, repeats: true)
}
@objc func sixHourCountdown()
{
let timeStarted = UserDefaults.standard.object(forKey: "count6")
let timeStart = timeStarted as! Date
let diffComponents = Calendar.current.dateComponents([.hour, .minute, .second], from: compareTime, to: timeStart)
let hour = diffComponents.hour!
let minute = diffComponents.minute!
let second = diffComponents.second!
let timeRemaining = String(format: "%02d:%02d:%02d", hour, minute, second)
compareTime += 1
if hour == 0 && minute == 0 && second == 0 || timeStart < compareTime
{
button.setTitle("PRESS", for: .normal)
button.backgroundColor = .green
timer.invalidate()
}
else
{
button.setTitle("PRESS IN" + "\n\(timeRemaining)", for: .normal)
}
}
@objc func buttonTap()
{
if button.currentTitle != "PRESS"
{
button.backgroundColor = .red
DispatchQueue.main.asyncAfter(deadline: .now() + .seconds(2), execute:
{
button.backgroundColor = .yellow
})
}
if button.currentTitle == "PRESS" && button.backgroundColor == .green
{
UserDefaults.standard.set(currentTime, forKey: "count6")
let otherVC = OTHERVC()
self.navigationController?.pushViewController(otherVC, animated: true)
}
}
override func viewDidLoad() {
super.viewDidLoad()
setupButtonTitle()Stack Overflow用户
发布于 2020-10-08 09:40:25
您可以获得时间并在按下按钮时保存它，然后您可以在viewdiload中占用时间并将它们进行比较。
就像这样
首先创建两个变量，一个用于当前时间，另一个用于比较
var currentTime = Date()
var compareTime = Date().addingTimeInterval(21600) //6 hours is 21600 second现在我们需要节省点击按钮的时间；
UserDefaults.standard.set(currentTime, forKey: "time")现在我们需要比较这些时代；
override func viewDidLoad() {
super.viewDidLoad()
var time = UserDefaults.standard.object(forKey: "time")
if let newTime = time as? Date {
if let difference = Calendar.current.dateComponents([.hour], from: newTime, to: compareTime).hour {
if difference > 6 {
//make whatever you want if 6 hours is finish
}
}
}
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/64256536
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