Swift4.0_Timer 的基本使用

版权声明： https://blog.csdn.net/qq_35122556/article/details/83058059

//
//  ViewController.swift
//  Day_10_Timer
//
//  Created by dongqiangfei on 2018/10/15.
//  Copyright © 2018年 飞飞. All rights reserved.
//

import UIKit

class ViewController: UIViewController {

    var timer = Timer()
    var clickNums = 5;
    override func viewDidLoad() {
        super.viewDidLoad()
        makeTimer()
        // Do any additional setup after loading the view, typically from a nib.
    }

    func makeTimer() {
        //穿件计时器
        timer = Timer.scheduledTimer(withTimeInterval: 1, repeats: true, block: { _ in
            print(self.clickNums)
            if self.clickNums < 0 {
                self.timer.fireDate = Date.distantFuture// 计时器暂停
            } else {
                self.clickNums -= 1
            }
        })
    }
    
   override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
    clickNums = 5
    timer.fireDate = Date.distantPast//计时器继续
    
    }
    
    override func touchesMoved(_ touches: Set<UITouch>, with event: UIEvent?) {
        timer.fireDate = Date.distantFuture// 计时器暂停
        timer.invalidate() // 计时器销毁
    }
    
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }


}