使用5+功能后，离开页面依然还会执行

        initBroadcast() {  
            let _this = this;  
            var main = plus.android.runtimeMainActivity();  
            var receiver = plus.android.implements('io.dcloud.feature.internal.reflect.BroadcastReceiver', {  
                onReceive: function(context, intent) {  
                    plus.android.importClass(intent);  
                    let code = intent.getStringExtra("data"); // 换你的广播标签   
                    console.log('扫码获取的code',code)  

                }  
            });  
            console.log(receiver,123123)  
            var IntentFilter = plus.android.importClass('android.content.IntentFilter');  
            var filter = new IntentFilter();  
            filter.addAction('com.rscja.scanner.action.scanner.RFID'); //自定义广播ACTION    
            main.registerReceiver(receiver, filter);  
        },  

离开了这个页面 console.log('扫码获取的code',code)这段代码还会执行，再次进入页面会执行两次，返回后在进入会执行三次，以此类推，请问有什么办法解决吗？

12:06:00.156 扫码获取的code, E28068940000502B56F38C7F
at pages/index/index.vue:45
12:06:03.256 onunload at pages/index/index.vue:34 这里是分割线，进入这个页面两次，运行了一次执行了两次方法，
12:06:08.750 扫码获取的code, E28068940000502B56F38C7F
at pages/index/index.vue:45
12:06:08.756 扫码获取的code, E28068940000502B56F38C7F
at pages/index/index.vue:45