小程序60秒倒计时

html:

  <button bindtap="ci_dao" disabled="{{disabled}}">{{dao}}</button>  需要用button标签，设置不可点击

data中定义：

dao: "倒计时",    disabled: false,

js:

//倒计时 

  ci_dao: function () {

    var num = 60;

    var that = this;

    that.setData({

      dao: num + "倒计时了",

      disabled: true

    });

    var interval = setInterval(function () {

      num = num - 1;

      console.log(num)

      if (num > 0) {

        that.setData({

          dao: num + "倒计时了"

        });

      } else {

        clearInterval(interval)

        that.setData({

          dao: "重新获取",

          disabled: false

        });

        num = 60;

      }

    }, 1000);

  }