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| <template>
<view>
<nav-bar navBgColor="#fff" left-text="打印机设置"></nav-bar>
<view class="refresh" @click="searchPrint">选择蓝牙设备<image class="icon"
src="https://taoliangche.oss-cn-beijing.aliyuncs.com/mini-my/6.30/resh.png"></image>
</view>
<view class="print-loading">搜索中...</view>
<view class="me-list">
<view class="item" v-for="(v,i) in devices" :key="i" @click="setBindDevice(v)">
<view class="name">{{v.name}}</view>
<view :class="['status',v.isBind&&'connect']">{{v.isBind?'已连接':'未连接'}}
<image class="icon" src="https://taoliangche.oss-cn-beijing.aliyuncs.com/mini-my/6.30/gth.png"></image>
</view>
</view>
</view>
</view>
</template>
<script setup>
import {
ref
} from 'vue'
import {
onLoad,
onHide,
onUnload
} from '@dcloudio/uni-app'
const devices = ref([])
const bindDevice = ref({})
const platform = ref('')
onLoad(() => {
getSystemInfo()
searchPrint()
})
onHide(() => {
stopBluetoothDevicesDiscovery()
})
onUnload(() => {
stopBluetoothDevicesDiscovery()
})
//得到系统信息
const getSystemInfo = () => {
uni.getSystemInfo({
success(res) {
platform.value = res.platform
}
})
}
//查询蓝牙设备
const searchPrint = () => {
uni.closeBluetoothAdapter({
complete: () => {
//初始化蓝牙
uni.openBluetoothAdapter({
success: () => {
startBluetoothDevicesDiscovery();
},
fail: (res) => {
if (res.errCode === 10001) {
console.log('蓝牙未开启');
} else {
console.log('蓝牙初始化失败');
}
}
})
}
});
}
//开始搜寻附近的蓝牙设备
const startBluetoothDevicesDiscovery = () => {
//停止蓝牙搜索
stopBluetoothDevicesDiscovery();
//开启蓝牙搜索
uni.startBluetoothDevicesDiscovery({
success: () => {
//搜索，监听返回结果
onBluetoothDeviceFound()
},
fail: (res) => {
console.log(res, "搜索蓝牙失败");
}
});
}
//停止蓝牙搜索
const stopBluetoothDevicesDiscovery = () => {
uni.stopBluetoothDevicesDiscovery({
success() {
console.log('停止蓝牙搜索success')
},
fail(res) {
console.log('停止蓝牙搜索fail', res)
}
})
}
//寻找到新设备的事件的回调函数
const onBluetoothDeviceFound = () => {
uni.onBluetoothDeviceFound((res) => {
console.log('寻找到新设备的事件的回调函数', res);
res.devices.forEach(device => {
if (!device.name && !device.localName) {
return
}
// 蓝牙数组
const foundDevices = devices.value;
const idx = findArrItem(foundDevices, device.deviceId);
if (idx === -1) {
foundDevices.push(device);
} else {
foundDevices[idx] = device;
}
const device1 = uni.getStorageSync("bindDevice");
if (device1) {
foundDevices.map((v) => {
if (v.name == device1.name) {
v.isBind = true;
}
return v
})
}
devices.value = foundDevices
})
})
}
//重复搜索时，判断设备是否已经存在过滤掉
const findArrItem = (arr, id) => {
let index = -1;
for (let i in arr) {
if (arr[i].deviceId == id) {
index = i;
}
}
return index;
}
//绑定设备
const setBindDevice = (item) => {
uni.showLoading({
title: "连接中...",
mask: true
})
//创建连接，测试设备是否可以读，可写
createBLEConnection1(item);
}
//低功耗蓝牙设备连接
const createBLEConnection1 = (item, callback) => {
uni.createBLEConnection({
deviceId: item.deviceId,
timeout: 15000,
success: (res) => {
console.log('蓝牙连接成功');
bindDevice.value = item
//如果蓝牙设备write没定义，说明是新设备需要执行
if (platform.value == 'android') {
if (item.write == undefined) {
//检查该蓝牙设备是否有写入权限，并保存参数，以便发送数据
setTimeout(() => {
getBLEDeviceServices1(item.deviceId, callback);
}, 3000)
} else {
callback ? callback() : ''
}
} else {
getBLEDeviceServices1(item.deviceId, callback);
}
},
fail: (res) => {
uni.hideLoading()
console.log("蓝牙连接失败:", res);
}
})
}
const getBLEDeviceServices1 = (deviceId, callback) => {
uni.getBLEDeviceServices({
deviceId,
success: (res) => {
console.log('获取蓝牙设备所有服务', res.services)
for (let i = 0; i < res.services.length; i++) {
if (res.services[i].isPrimary) {
getBLEDeviceCharacteristics1(deviceId, res.services[i].uuid, callback)
// return
}
}
},
fail: (res) => {
uni.hideLoading()
console.log("获取蓝牙服务失败：" + JSON.stringify(res))
}
})
}
//获取蓝牙设备某个服务中所有特征值(characteristic)
const getBLEDeviceCharacteristics1 = (deviceId, serviceId, callback) => {
uni.getBLEDeviceCharacteristics({
deviceId,
serviceId,
success: (res) => {
console.log('获取设备特征值', res.characteristics)
for (let i = 0; i < res.characteristics.length; i++) {
let item = res.characteristics[i];
let _uuid = item.uuid;
let bindDevices = bindDevice.value;
// 读取低功耗蓝牙设备的特征值的二进制数据值 注意：必须设备的特征值支持 read 才可以成功调用。
if (item.properties.read) {
bindDevices.read = true;
}
//向低功耗蓝牙设备特征值中写入二进制数据。注意：必须设备的特征值支持 write 才可以成功调用。
if (item.properties.write && !item.properties.notify) {
bindDevices.serviceId = serviceId;
bindDevices.characteristicId = _uuid;
bindDevices.write = true;
callback ? callback() : ''
}
//启用低功耗蓝牙设备特征值变化时的 notify 功能，使用characteristicValueChange事件
if (item.properties.notify || item.properties.indicate) {
uni.notifyBLECharacteristicValueChange({
deviceId,
serviceId,
characteristicId: _uuid,
state: true,
})
}
//设置当前选中的蓝牙设备，包括是否可读写属性采集
bindDevice.value = bindDevices;
let oldDevices = devices.value;
devices.value = oldDevices.map((v) => {
if (v.name == bindDevices.name) {
v.isBind = true;
}
return v
})
uni.setStorageSync("bindDevice", bindDevices);
}
if (uni.getStorageSync("bindDevice").characteristicId) {
uni.showToast({
title: "连接成功",
icon: "success",
complete() {
setTimeout(() => {
uni.navigateBack()
}, 1500)
}
})
}
},
fail(res) {
console.error('获取特征值失败：', res)
},
complete() {
uni.hideLoading()
}
})
}
</script>
<style lang="scss">
.refresh {
display: flex;
align-items: center;
justify-content: space-between;
width: 100%;
height: 113rpx;
background: #FFFFFF;
border-radius: 0 0 20rpx 20rpx;
font-size: 30rpx;
color: #262626;
padding: 0 30rpx;
.icon {
width: 28rpx;
height: 28rpx;
}
}
.print-loading {
width: 100%;
text-align: center;
font-size: 30rpx;
color: #262626;
padding: 30rpx 0 0;
}
.me-list {
width: 690rpx;
background: #FFFFFF;
border-radius: 20rpx 20rpx 20rpx 20rpx;
margin: 30rpx auto;
padding: 0 20rpx;
.item {
display: flex;
align-items: center;
justify-content: space-between;
width: 100%;
height: 112rpx;
border-bottom: 1px solid rgba(37, 37, 37, .03);
&:last-child {
border-bottom: none;
}
.name {
width: 500rpx;
text-overflow: ellipsis;
overflow: hidden;
white-space: nowrap;
font-size: 36rpx;
color: #333333;
}
.status {
display: flex;
align-items: center;
font-size: 30rpx;
color: #808080;
&.connect {
color: #4D4D4D;
}
.icon {
width: 27rpx;
height: 27rpx;
margin-left: 20rpx;
}
}
}
}
</style>
|