小程序如何实现计时器功能
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摘要: 效果图如下布局(.wxml)<viewclass="countTime">{{timecount}}</view><buttonclass="aaa"bindtap="start">开始</button><buttonclass="aa... ...
音频解说
目录
(为您整理了一些要点),点击可以直达。效果图如下
布局(.wxml)
<viewclass="countTime">{{timecount}}</view><buttonclass="aaa"bindtap="start">开始</button><buttonclass="aaa"bindtap="stop">暂停</button><buttonclass="aaa"bindtap="Reset">停止</button>
样式(.css)
/*小程序计时器*/.countTime{height:200px;font-size:30px;line-height:200px;text-align:center;}.aaa{width:150px;background:rgb(7,193,96);color:#fff;margin-bottom:8px;}
效果(.js)
varinit;Page({data:{//小程序计时器hour:0,minute:0,second:0,millisecond:0,timecount:'00:00:00',cost:0,flag:1,endtime:"",},start:function(){clearInterval(init);varthat=this;that.setData({hour:0,minute:0,second:0,millisecond:0})init=setInterval(function(){that.timer()},50);},stop:function(){clearInterval(init);},Reset:function(){varthat=this;clearInterval(init);that.setData({hour:0,minute:0,second:0,millisecond:0,timecount:'00:00:00'})},timer:function(){varthat=this;console.log(that.data.millisecond)that.setData({millisecond:that.data.millisecond+5})if(that.data.millisecond>=100){that.setData({millisecond:0,second:that.data.second+1})}if(that.data.second>=60){that.setData({second:0,minute:that.data.minute+1})}if(that.data.minute>=60){that.setData({minute:0,hour:that.data.hour+1})}that.setData({timecount:that.data.hour+":"+that.data.minute+":"+that.data.second+":"+that.data.millisecond})}});
注意的点: 在点击启动定时器按钮时,多次连着点击,会累加定时器,会造成定时器加速的效果,为了避免这种情况,应该在每次点击开始前先清除一下定时器。
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