一、效果图

二、代码

			//点击事件rightBtn(sub, index) {console.log(sub, index)//uniapp 数组添加不重复元素if (this.selectList.includes(sub.type)) {this.selectList = this.selectList.filter((item) => {return item != sub.type;});} else {this.selectList.push(sub.type);this.selectList = [...new Set(this.selectList)]; // 数组去重if (this.selectList.length > 3) {uni.showToast({title: "最多选3个",icon: "none"});this.selectList.splice(3, this.selectList.length - 3);}}},

完成~