ios - 计时器进入底片/不重置

Question

我正在尝试为我的应用设置倒数计时器。我的代码有效，因此每次拖动图像 whiteDot 并包含 smallDot 时，倒计时开始，并且 smallDot 会在屏幕上的随机位置生成。我有几个问题

1.) 我试图在每次执行“if (whiteDot.frame.contains(smallDot.frame) && smallDot.image != nil)”语句后将计时器重置为 2 秒。

2.) 每次“if”语句执行一次，它都会正常倒计时，但是当它在倒计时达到零之前再次执行时，它开始变成负数并且计数快于 1 秒。

import UIKit

var timeClock =  2

class SecondViewController: UIViewController {

func startTimer() {
    timeClock -= 1
    time.text =  "Time: " + String(timeClock)

if whiteDot.frame.contains(smallDot.frame) && timeClock > 0 {
        timeClock = 2
    }

   else if timeClock == 0 || timeClock < 0 {
        timer.invalidate()
  } 
 }

var timer = Timer()

@IBAction func handlePan(recognizer:UIPanGestureRecognizer) {
    let translation = recognizer.translation(in: self.view)
    if let view = recognizer.view {
        view.center = CGPoint(x:view.center.x + translation.x,
                              y:view.center.y + translation.y)
    }
    recognizer.setTranslation(CGPoint.zero, in: self.view)

    if (whiteDot.frame.contains(smallDot.frame) && smallDot.image != nil) {
        addOne += 1

        score.text = "\(addOne)"

        smallDot.center = spawnRandomPosition()

timeClock = 2
        if timeClock == 0 || timeClock < 0 {
            timer.invalidate()
        }
        else if timeClock > 0 && (whiteDot.frame.contains(smallDot.frame)){
            timeClock = 2

        }
        timer = Timer.scheduledTimer(timeInterval: 1, target: self, selector: #selector(SecondViewController.action), userInfo: nil, repeats: true)  
    }
    }

Answer 1

刚发现我的问题。我根本没有重置计时器。首先，我试图在“ Action ”函数中重置它，但我只需要将它移到底部 if 语句即可解决我所有的问题。此代码适用于在发生特定操作时尝试重置计时器的任何人。

class SecondViewController: UIViewController
{
 var addOne = 0

func startTimer() {

    timeClock -= 1

    time.text =  "Time: " + String(timeClock)

   if timeClock <= 0 {
    timer.invalidate()
    //show game over
    }
}

func resetTimer() {
    timer.invalidate()
    timeClock = 3
}
var timer = Timer()

 @IBAction func handlePan(recognizer:UIPanGestureRecognizer) {
    let translation = recognizer.translation(in: self.view)
    if let view = recognizer.view {
        view.center = CGPoint(x:view.center.x + translation.x,
                              y:view.center.y + translation.y)
    }
    recognizer.setTranslation(CGPoint.zero, in: self.view)

    if (whiteDot.frame.contains(smallDot.frame) && smallDot.image != nil) {
        addOne += 1

  score.text = "\(addOne)"

        resetTimer()

        timer = Timer.scheduledTimer(timeInterval: 1, target: self, selector: #selector(SecondViewController.startTimer), userInfo: nil, repeats: true)

        smallDot.center = spawnRandomPosition()   
    }
    }