我的遮罩层用的是subNVues subNVue.hide以后 click事件就不能用了

//App.vue  
onLaunch: function() {  
            let _this = this;  
//底部菜单中间按钮被点击的时候  显示遮罩层  
            uni.onTabBarMidButtonTap(()=>{  
                let subNVue = uni.getSubNVueById('send')  
                subNVue.show('slide-in-bottom', 300, function(){});   
                uni.$emit('onTabBarMidButtonTap',{})  
            })  
        },  
//pages.json  
{  
            "path" : "pages/index/index",  
            "style" : {  
                "navigationBarTitleText":"消息列表",  
                "navigationBarShadow" : "grey",  
                "app-plus": {  
                    "scrollIndicator" : "none",  
                    "subNVues":[{//弹出层  
                        "id": "send",  
                        "path": "pages/subnvue/send",  
                        "type" : "popup",  
                        "style": {  
                            "height" : "100%",    
                            "background": "transparent",  
                            "popGesture": "none"  
                        }  

                    }]  
                }  
            }  
        }  

//send.nvue  

//关闭遮罩层  
closeMask() {  
                let _this = this  
                let subNVue = uni.getSubNVueById('send')    
                subNVue.hide('slide-out-bottom', 300)  
                _this.animationData = {}  
                _this.mask = false  
            },