vue中router使用keep-alive缓存页面的注意事项

<keep-alive exclude="QRCode"><router-view></router-view></keep-alive> exclude表示不缓存这个界面，注意 QRCode是组件的名字export default {name:"QRCode",components: {nqr},

使用 setInterval一定要销毁，不然会一直执行created() {this.getData();var _this = this;this.IntervalId= setInterval(function() {_this.getData();}, 3000);},beforeDestroy(){clearInterval(this.IntervalId);},