函数外为什么停不了？clearInterval

[cs113dn]

private countDownTimer = 0;
private timeControl(second) {
if (second > 0) {
this.countDownTimer = egret.setTimeout(()=>{

}, this, 1000);

this.countDownTimer = egret.setInterval(function () {
if (second > 0 && this.bCanSelectFreeGame) {
second--;
// console.log('secound:', second);
let str: string = Utils.replaceString(Config.language['freeGameCountDown_' + Config.lang], [second]);
MainGameView.instance.changeGameTip(str);

if (second <= 0) {
// console.log("停止计时");
clearInterval(this.countDownTimer);//倒计时结束停止有效

let str: string = Utils.replaceString(Config.language['mainGame016_' + Config.lang]);
MainGameView.instance.changeGameTip(str);
}
}
}, this, 1000);
}
}



private onOpenButton(evt: egret.Event) {
let self = this;

clearInterval(this.countDownTimer);//倒计时还未结束时点击按钮停止无效？
}

[cs113dn]

this.countDownTimer = egret.setTimeout(()=>{ }, this, 1000); 这句话不要，原打算换个写法

[Hello World,]

clearInterval(this.countDownTimer);//倒计时还未结束时点击按钮停止无效？ 当执行这句时你预期的this是什么？ 它有countDownTimer属性吗？ 弄清楚作用域就明白了

[cs113dn]

countDownTimer是类中的全局变量