data() {
return {
 phone_mouseMIndex: 0, // phone端 滑动索引
 phone_mouseMX0: 0, // phone端 滑动索引
 phone_mouseMX1: 0, // phone端 滑动索引
}
},
...
// phone端 滑动开始
phone_mouseS(e){
 this.phone_mouseMX0 = e.changedTouches[0].pageX;
},
// phone端 滑动结束
phone_mouseE(e){
 this.phone_mouseMX1 = e.changedTouches[0].pageX;
 let tag = this.phone_mouseMX1 - this.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;
 }
 }
}