搜索蓝牙设备第二次进入无法监听到

Question

在使用uniapp开发小程序时，需要搜索附近的蓝牙设备，使用wx.startBluetoothDevicesDiscovery开启搜索蓝牙设备成功后，使用 wx.onBluetoothDeviceFound进行监听，，第一次进入界面可以监听到，但是返回上一级页面再次开启搜索蓝牙设备成功后进行监听，无法监听到任何设备，这是哪里的问题呢？
代码如下

<template>
    <view>
        <view v-for="(item,index) in equipmentList" :key="index">
            <view class="ble-name" @click="chooseEquipment(item)">
                {{item.name}}
                <view class="ble-split"></view>
            </view>
        </view>
        <!-- 提示窗示例 -->
        <uni-popup ref="alertDialog" type="dialog">
            <uni-popup-dialog :type="msgType" cancelText="关闭" confirmText="已打开" title="警告" content="请打开蓝牙"
                @confirm="dialogConfirm" @close="dialogClose"></uni-popup-dialog>
        </uni-popup>
    </view>
</template>
<script>
    export default {
        data() {
            return {
                imageBaseUrl: '',
                equipmentList: [],
                userInfo: '',
                msgType: '',
            }
        },
        onLoad() {
            let that = this
            wx.getSetting({
                success(res) {
                    //判断是否有'scope.bluetooth'属性
                    if (res.authSetting.hasOwnProperty('scope.bluetooth')) {
                     //'scope.bluetooth'属性存在，且为false
                        if (!res.authSetting['scope.bluetooth']) {
                            //弹窗授权
                            wx.openSetting({
                                success(res) {
                                    console.log(res.authSetting)
                                }
                            })
                        }
                    } else {
                        console.log("cd")
                        //'scope.bluetooth'属性不存在，需要授权
                        wx.authorize({
                            scope: 'scope.bluetooth',
                            success() {
                                // 用户已经同意小程序使用手机蓝牙功能，后续调用 蓝牙 接口不会弹窗询问
                                console.log(res.authSetting)
                            }
                        })
                    }
                }
            })
            console.log(43544656)
            this.equipmentList = []
            wx.openBluetoothAdapter({
             success(res) {
                    console.log("初始化蓝牙模块成功", res)
                    that.getAllEquipments()
                },
                fail(erro) {
                    if (erro.errCode == 10001) {
                        that.msgType = 'error'
                        that.$refs.alertDialog.open()
                    }
                }
            })
        },
        onShow() {
            this.equipmentList = []
        },
        onBackPress() {
            this.equipmentList = []
            uni.stopBluetoothDevicesDiscovery({
                success(res2) {
                    console.log('停止成功')
                    console.log(res2)
                },
                fail(err) {
                    console.log('停止失败')
                    console.error(err)
                }
            })
        },
        methods: {
            dialogConfirm(e) {
                console.log(e)
            },
            dialogClose(e) {
                console.log(e)
            },
            getAllEquipments() {
                let that = this
                wx.startBluetoothDevicesDiscovery({
                    success(res) {
                        console.log("开启搜索蓝牙设备", res)
                        wx.onBluetoothDeviceFound(function(res1) {
                            var devices = res1.devices;
                      console.log(devices[0].name)
                            if (devices[0].name != '' && devices[0].name != null) {
                                console.log("新的设备")
                                console.log(devices[0].name)
                             that.equipmentList.push(devices[0])
                                that.$forceUpdate()
                            }
                        })
                    },
                    fail(err1) {
                     console.log("搜索失败", err1)
                    }
                })
            },
            chooseEquipment(e) {
                wx.createBLEConnection({
                    deviceId: e.deviceId,
                    success(res1) {
                  console.log(res1)
                        console.log("连接成功！")
                        uni.stopBluetoothDevicesDiscovery({
                            success(res2) {
                                console.log('停止成功')
                                console.log(res2)
                                uni.navigateTo({
                                    url: '/pages/equipment/equipment?item=' + encodeURIComponent(
                                        JSON.stringify(e))
                                })
                            },
                            fail(err) {
                       console.log('停止失败')
                       console.error(err)
                            }
                     })
                    }
                })
            },
            ab2hex(buffer) {
                var hexArr = Array.prototype.map.call(new Uint8Array(buffer), function(bit) {
                    return ('00' + bit.toString(16)).slice(-2)
                })
                return hexArr.join('');
            }
        }
    }
</script>
<style>
    .ble-name {
        margin-left: 10px;
        height: 32px;
        line-height: 32px;
        font-size: 16px;
        width: calc(100% - 20px);
        margin-top: 10px;
    }

    .ble-split {
        width: 100%;
        height: 1px;
        background-color: #C4C4C4;
    }
</style>

Answer 1

再次进入的时候 59 97 都打印了吗