pda 扫码逻辑记录 ​

let main, receiver, filter;
let _codeQueryTag = false;

export const initScan = () => {
  let _this = this;
  main = plus.android.runtimeMainActivity(); //获取activity
  var IntentFilter = plus.android.importClass("android.content.IntentFilter");
  filter = new IntentFilter();
  // filter.addAction('com.honeywell.scan.broadcast'); // 换你的广播动作
    filter.addAction('mukang');
  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
        queryCode(code);
      },
    }
  );
};

export const startScan = () => {
  main.registerReceiver(receiver, filter);
	console.log('新实例-开始扫码')
};
export const stopScan = () => {
  if(!main) return
  main.unregisterReceiver(receiver);
  //解绑uni的全局$on 不然会有bug
  uni.$off('SCAN_CODE')
  console.log('结束');
};
export const queryCode = (code) => {
  //防重复
  if (_codeQueryTag) return false;
  _codeQueryTag = true;
  setTimeout(function () {
    _codeQueryTag = false;
  }, 150);
  var id = code;
  //id就是扫码的结果
  console.log('触发');
  uni.$emit("SCAN_CODE", { code: id });
};

let main, receiver, filter;
let _codeQueryTag = false;

export const initScan = () => {
  let _this = this;
  main = plus.android.runtimeMainActivity(); //获取activity
  var IntentFilter = plus.android.importClass("android.content.IntentFilter");
  filter = new IntentFilter();
  // filter.addAction('com.honeywell.scan.broadcast'); // 换你的广播动作
    filter.addAction('mukang');
  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
        queryCode(code);
      },
    }
  );
};

export const startScan = () => {
  main.registerReceiver(receiver, filter);
	console.log('新实例-开始扫码')
};
export const stopScan = () => {
  if(!main) return
  main.unregisterReceiver(receiver);
  //解绑uni的全局$on 不然会有bug
  uni.$off('SCAN_CODE')
  console.log('结束');
};
export const queryCode = (code) => {
  //防重复
  if (_codeQueryTag) return false;
  _codeQueryTag = true;
  setTimeout(function () {
    _codeQueryTag = false;
  }, 150);
  var id = code;
  //id就是扫码的结果
  console.log('触发');
  uni.$emit("SCAN_CODE", { code: id });
};

// 进入组件开始挂载扫码
 try {
    initScan()
    startScan();
    uni.$on("SCAN_CODE", ({
        code
    }) => {
        // 判断code如果有回车符，则去掉
        if (code.indexOf('\n') !== -1) {
            code = code.replace(/\n/g, '')
        }
        // 判断code如果有换行符，则去掉
        if (code.indexOf('\r') !== -1) {
            code = code.replace(/\r/g, '')
        }

        this.changeCode(code)
    });
} catch (err) {
    console.log(err, '扫码功能加载错误');
}


----------------------------------------------------
beforeMount() {
    console.log('---组件挂载前卸载之前实例');
    stopScan()
},

// 进入组件开始挂载扫码
 try {
    initScan()
    startScan();
    uni.$on("SCAN_CODE", ({
        code
    }) => {
        // 判断code如果有回车符，则去掉
        if (code.indexOf('\n') !== -1) {
            code = code.replace(/\n/g, '')
        }
        // 判断code如果有换行符，则去掉
        if (code.indexOf('\r') !== -1) {
            code = code.replace(/\r/g, '')
        }

        this.changeCode(code)
    });
} catch (err) {
    console.log(err, '扫码功能加载错误');
}


----------------------------------------------------
beforeMount() {
    console.log('---组件挂载前卸载之前实例');
    stopScan()
},