- 当前 Bug 的表现（可附上截图）
- 预期表现
- 复现路径
- 提供一个最简复现 Demo
var _this = this
let deviceId = e.currentTarget.dataset.id
let info = e.currentTarget.dataset.info
let checkBoxValue = e.currentTarget.dataset.value
let offset = Math.floor(info[21]/30)
wx.getBLEDeviceServices({
deviceId: deviceId,
success(res) {
wx.getBLEDeviceCharacteristics({
deviceId: deviceId,
serviceId: '10FF0200-BA5E-F4EE-5CA1-EB1E5E4B1CE0',
success(res1) {
writeOffset(deviceId, offset, _this)
}
})
}
})
var common = require('../../lib/public.js')
function readinfo(deviceId, offset,_this) {
var arr = new Array()
wx.readBLECharacteristicValue({
deviceId: deviceId,
serviceId: '10FF0200-BA5E-F4EE-5CA1-EB1E5E4B1CE0',
characteristicId: '0000FF50-0000-1000-8000-00805F9B34FB',
success(res3) {
}
})
wx.onBLECharacteristicValueChange((characteristic) => {
var dv = new Int16Array(characteristic.value)
for (let j = 0; j < dv.length; j++) {
arr[j] = (dv[j] / 10).toFixed(1)
}
arr = common.resetArray(arr, _this.data.index)
for (var z = 0; z < arr.length; z++) {
//arr[z].push(_this.data.index)
_this.data.upPage[1].push(arr[z])
}
if(_this.data.index==0){
_this.data.time1 = new Date().getTime()
}else{
console.log(new Date().getTime() - _this.data.time1)
_this.data.time1 = new Date().getTime()
}
//console.log(arr)
if (_this.data.index < offset) {
_this.data.index++
writeOffset(deviceId, offset, _this)
}
})
}
function writeOffset(deviceId, offset, _this) {
_this.data.isfor = false
let buffer = new ArrayBuffer(4)
let dataView = new DataView(buffer)
dataView.setUint32(0, _this.data.index, true)
wx.writeBLECharacteristicValue({
deviceId: deviceId,
serviceId: '10FF0200-BA5E-F4EE-5CA1-EB1E5E4B1CE0',
characteristicId: '0000FF53-0000-1000-8000-00805F9B34FB',
value: buffer,
success(res2) {
if (res2.errCode == 0) {
readinfo(deviceId, offset, _this)
}
}
})
}
蓝牙设备上有很多数据，但是一次只能读120自己，所以就先写入读取位置，然后读取-再写入读取这样吧把所有数据读取出来，这时候安卓比苹果速度慢7倍。这是什么原因呢？
