如果app未启动的时候，点击push页进入指定页面，这时候用户返回会出现白屏的情况

// #ifdef APP-PLUS  
// 监听推送消息  
plus.push.addEventListener('click', msg => {  

    this.handlePush(msg);  

}, false);    

//监听接收透传消息事件    

plus.push.addEventListener('receive', msg => {    

        this.handlePush(msg);  

}, false);  

           handlePush(msg){  

                console.log(msg);  

                const systemInfo = uni.getSystemInfoSync();  

                if(typeof msg.payload === 'string'){  

                    msg.payload = JSON.parse(msg.payload);  

                }  

                let type = msg.payload.type || '';  
                let name = msg.payload.name || ''  

                 uni.report(`click_push_${name}`,{  

                   'brand':systemInfo.brand,    

                   'model':systemInfo.model,  

                 })   

                if(type){  
                    switch(type){  
                        case "express":  
                            if(msg.payload.orderId)this.$common.navigateTo(`/pages/member/order/orderdetail?order_id=${msg.payload.orderId}`);  
                            break;  
                        case "all":  
                            if(msg.payload.url)this.$common.navigateTo(msg.payload.url)  
                            break;  
                        case "seckill_coming_goods":  
                            if(msg.payload.goodsId)this.$common.navigateTo(`/pages/goods/index/index?id=${msg.payload.goodsId}`)  
                            break;  
                        case "user_register_supplier_success":  
                            this.$common.navigateTo(`/pages/apply/result/result?status=1`);  
                            break;  
                        case "user_register_supplier_failed":  
                            if(msg.payload.shenhe_failed_reason){  
                                this.$common.navigateTo(`/pages/apply/result/result`);  
                                this.$store.dispatch("setReason",msg.payload.shenhe_failed_reason);  
                            };  
                            break;  
                    }  
                }  
            }