小程序验证码倒计时效果

//点击事件执行getcode后需要禁用点击倒计时完成激活点击事件
Page({
	data: {
		codetime:"获取验证码",
		close:""
	},
	//获取验证码
	getcode:function(){
		var that = this;
		that.setData({
			codetime:60,
			close: setInterval(that.gettime, 1000)
		});
	},
	gettime:function(){
		var that = this;
		if (that.data.codetime == 0) {
			//清除js定时器  
			clearInterval(that.data.close);
			that.setData({
				codetime: "获取验证码",
			});
		} else {
			that.setData({
				codetime: --that.data.codetime,
			});
		}
	}
})