读取是哪个接口，是在onDiscovered返回读取的数据吗？

openBluetoothAdapter: function () { wx.openBluetoothAdapter({ success: res => { console.log(res); } }) }, connect: function() { wx.startBluetoothDevicesDiscovery({ services: ['0000FEE1-0000-1000-8000-00805F9B34FB'], allowDuplicatesKey: true, success: res => { console.log(JSON.stringify(res)); wx.getBluetoothDevices({ success: res => { console.log('getBluetoothDevices:' + JSON.stringify(res)); if(res.devices.length > 0) { this.setData({ deviceId: res.devices[0].deviceId }) wx.createBLEConnection({ deviceId: res.devices[0].deviceId, complete: res => { console.log('createBLEConnection:' + JSON.stringify(res)); } }) } } }) } }); }, notify: function() { wx.getBLEDeviceServices({ deviceId: '48ADF6C5-261F-D9B0-BD6C-91FCF8B57737', complete: function (res) { console.log('getBLEDeviceServices:' + JSON.stringify(res)); wx.getBLEDeviceCharacteristics({ deviceId: '48ADF6C5-261F-D9B0-BD6C-91FCF8B57737', serviceId: '0000FEE1-0000-1000-8000-00805F9B34FB', complete: function (res) { console.log('getBLEDeviceCharacteristics:' + JSON.stringify(res)); wx.notifyBLECharacteristicValueChange({ deviceId: '48ADF6C5-261F-D9B0-BD6C-91FCF8B57737', serviceId: '0000FEE1-0000-1000-8000-00805F9B34FB', characteristicId: '00001003-0000-1000-8000-00805F9B34FB', state: true, complete: res => { console.log(JSON.stringify(res)); } }) wx.onBLECharacteristicValueChange((res) => { console.log('onBLECharacteristicValueChange:' + JSON.stringify(res)); }); } }) } }) }, write: function(){ let buffer = new ArrayBuffer(1) let dataView = new DataView(buffer) dataView.setUint8(0, 0) wx.writeBLECharacteristicValue({ deviceId: '48ADF6C5-261F-D9B0-BD6C-91FCF8B57737', serviceId: '0000FEE1-0000-1000-8000-00805F9B34FB', characteristicId: '00001003-0000-1000-8000-00805F9B34FB', value: buffer, complete: function (res) { console.log('writeBLECharacteristicValue:' + JSON.stringify(res)); // wx.readBLECharacteristicValue({ // deviceId: '48ADF6C5-261F-D9B0-BD6C-91FCF8B57737', // serviceId: '0000FEE1-0000-1000-8000-00805F9B34FB', // characteristicId: '00001003-0000-1000-8000-00805F9B34FB', // success: function(res) { // console.log('readBLECharacteristicValue:' + JSON.stringify(res)); // }, // }) }, }) }, [图片] onBLECharacteristicValueChange 没有回调 手机 iPhone 11 Pro， iOS 13.3 微信 7.0.12

机型: iPhone 8 iOS 11.4.1 微信版本：6.7.2 代码片段： var file = wx.getFileSystemManager()         file.writeFile({           filePath: wx.env.USER_DATA_PATH + '/test/test.text',           data: new Uint16Array([97, 32, 72, 101, 108, 108, 111, 32, 119, 111, 114, 108, 100, 33]),           complete: function (res) {             console.log(res);           }         })

FileSystemManager.mkdir({     dirPath: 'test',     complete(obj) {         console.log(obj);     } }); 同样创建失败，不太明白dirPath 的路径要求