记录代码，定时循环for，每隔两秒循环

// 定时循环
var string = [{
                  name: '1'
                },{
                    name: '2'
                },{
                    name: '3'
                },{
                    name: '4'
                },{
                    name: '5'
                },];
var count = string.length - 1;
var mytimer = setInterval(function(){test();}, 2000);  //利用setInterval实现间隔两秒执行一次test()函数
function test() {
    var barcode = string[count];
    count--;
    if( count < 0){ clearInterval(mytimer);}  //clearInterval取消循环
    console.log(barcode);
}