微信小程序分享路径被缓存

接到个需求

用户可以把停车场的卡券通过微信聊天分享给好友  

先上代码

	async onShareAppMessage() {
			console.log('aaa')
			if (this.status != 5) return
			const {
				strArr,
				type,
				special,
				specialLicensePlateId
			} = this.$data;
			let random = ''
			for (let i = 0; i < 6; i++) {
				console.log(random)
				random += Math.floor(Math.random() * 10)
			}
			const str = special ? specialLicensePlateId : strArr.join('');
			if (str.length < 7) {
				this.$ajax.showToast('请输入车牌');
				return null
			}
			console.log(this.userdata)
			if (!this.userdata.number) {
				return null
			}
            //异步函数 获取参数
			const coupon_Id = await this.gift(str)
			console.log(coupon_Id, random)
			return {
				title: '领取卡券',
				path: `/pages/cardManage/shareCard?random=${random}&couponId=${coupon_Id}&cardId=${this.couponId}&giftId=${this.userdata.number}`,
				// imageUrl:
			}
		}

button绑定share的开放能力

测试时发现路径经常被wx缓存到 所以加了随机数解决