vue手机触屏滑动

undefined-这个.phone_mouseMX0；if(tag>=50){if(this.phone_mouseMIndex>0){this.phone_mouseMIndex--;}else{this.phone_mouseMIndex=2;}}if(tag<=-50){if(this.phone_mouseMIndex<2){this.phone_mouseMIndex++;}else{this.phone_mouseMIndex=0;}}},