angular倒计时简单实现

2017-11-20

实现步骤

定义秒数
```
allsecond  = 564231657856;
```
定义一个方法,将秒数转换成 X天时分秒的格式

convertTimeString = function(allsecond){
    var days = Math.floor( allsecond/(3600*24) ); // 天数
    var hours = Math.floor( (allsecond -days*3600*24)/3600 ); // 小时数
    var minutes = Math.floor( (allsecond - days*3600*24 - hours*3600)/60 ); //分钟数
    var seconds = allsecond - days*3600*24 - hours*3600 - minutes*60 ; // 秒
    var timeString = "";
    var hoursString = "";
    var minutesString = "";
    var secondString = "";
    if(days>0){
        timeString += days;
    }
    if (hours<10) {
        hoursString += "0";
    }
    if (minutes<10) {
        minutesString += "0";
    }
    if (seconds<10) {
        secondString += "0";
    }

    return     timeString + "天   " + hoursString + hours+":"+ minutesString +minutes+":"+ secondString +seconds;
}

定义方法

$scope.show = function() {        
    time= $interval(function(){ 
          if(allsecond>0){ 
              allsecond =allsecond-1;
            $scope.timeString=convertTimeString(allsecond);//转换时间字符串
          }else{
              $interval.cancel(time);           
              alert("结束");
          }
        },1000);    


}

页面调用
```
{{timeString}}
```