Angular2实现的秒表及改良版示例

export class Watches {
  id: number;
  str: string;
}
export let watcheList: Watches[] = [{
  id: 0, str: '123456'
}, {
  id: 1, str: '564822'
}]
//watchList 是一个静态类
watchList = watcheList;
watchStr: string;
//判断是否是第一次点击startWatch
num: number = 0;
//分 秒 毫秒
minute: number = 0;
second: number = 0;
millisecond: number = 0;
//临时变量 存储计次时的时间，后加入watcheList数组
temp= {
 id: 0,
 str: '0'
};
//定时器的名字
inter: any;
constructor() { }
 resetWatch() {
   //清零
  this.millisecond = 0;
  this.second = 0;
  this.minute = 0;
  this.temp.str = '000000';
  watcheList.length = 0;
 }
timer() {
  //每隔43ms，调用该函数，所以增加43
 this.millisecond = this.millisecond + 43;
 if (this.millisecond >= 1000) {
  this.millisecond = 0;
  this.second = this.second + 1;
 }
 if (this.second >= 60) {
  this.second = 0;
  this.minute = this.minute + 1;
 }
//当小于10是，在前面加一个0，形式则变为00:00:00
 this.watchStr = (this.minute > 10 ? this.minute : '0' + this.minute) + ':'
  + (this.second > 10 ? this.second : '0' + this.second) + ':'
  + (this.millisecond > 10 ? this.millisecond : '0' + this.millisecond);
}
 startWatch(event) {
  this.num = this.num + 1;
  if (this.num > 1) {
   //该状态应该为计次
   temp.id = this.watchList.length;
   temp.str = this.watchStr;
   this.watchList.push(temp);
  } else {
   this.inter = setInterval(() => {
    this.timer();
   }, 43);
  }
 }
 stopWatch(event) {
  this.num = 0;
  if (this.inter) {
   clearInterval(this.inter);
  }
 }
}

// 秒表
export class Watches {
  id: number;
  value: number;
}
export let watcheList: Watches[] = []
export class StopwatchComponent {
 //导入的静态类
 watchList = watcheList;
 //临时变量，用来存贮计次时的时间
 temp: number;
 //判断startWatch是第一次开始，还是计次
 num: number = 0;
 //开始时间
 startTime: number;
 //当前时间
 nowTime: number;
 //时间差
 timerRunner: number = 0;
 //interval函数的名称
 inter: any;
 constructor() { }
 resetWatch() {
  //清零
  this.timerRunner = 0;
  this.watchList.length = 0;
 }
 startWatch(event) {
  this.temp = this.timerRunner;
  //开始计时的时间
  this.startTime = Date.now();
  this.num = this.num + 1;
  if (this.num > 1) {
   //当前状态为计时，将计时的数据加入进watchList
   let watchObj: Watches = {
    id: 0,
    value: 0
   }
   watchObj.id = this.watchList.length;
   watchObj.value = this.timerRunner;
   this.watchList.push(watchObj);
  } else {
   this.inter = setInterval(() => {
    this.nowTime = Date.now();
    this.timerRunner = this.temp + this.nowTime - this.startTime;
   }, 43);
  }
 }
 stopWatch(event) {
  this.num = 0;
  if (this.inter) {
   clearInterval(this.inter);
  }
 }
}