无效
this.array[index] = value;
this.array.length = 2;
正确方法,vue会触发视图更新
this.array.$set(index, value);
this.array.push(value);
数组操作
push()
pop()
shift()
unshift()
splice() //注意长度会变化
sort()
reverse()
this.array[index] = value;
this.array.length = 2;
this.array.$set(index, value);
this.array.push(value);
push()
pop()
shift()
unshift()
splice() //注意长度会变化
sort()
reverse()