微信小程序定时器没一直减只减一次？，求指点

Question

点击按钮之后一直是59不减了data:{tiem:60}code:function () {var that = this;var tiem = that.data.tiem;if (tiem == 0) {  that.setData({    tiem: 60,    true_false: true,  });  return;}var time = setInterval(function () {  console.log(tiem-1)  that.setData({    true_false: false,    tiem: tiem -1  });}, 1000)}

Answer 1

var that = this;

var tiem = that.data.tiem;

if (tiem == 0) {

  that.setData({

    tiem: 60,

    true_false: true,

  });

  return;

}

var time = setInterval(function () {

  console.log(that.data.tiem-1)

  that.setData({

    true_false: false,

    tiem: that.data.tiem -1

  });

}, 1000)

Answer 2

tiem得在循环当中再获取一下

Answer 3

number是基本类型。。。tiem没有引用this.data.tiem

var time = setInterval(function () {

  console.log(this.data.tiem - 1)

  that.setData({

    true_false: false,

    tiem: this.data.tiem - 1

  });

}, 1000)