报错内容：
This app has crashed because it attempted to access privacy-sensitive data without a usage description. The app’s Info.plist must contain an NSBluetoothAlwaysUsageDescription key with a string value explaining to the user how the app uses this data.
原因：
IOS 13中，蓝牙权限改为 NSBluetoothAlwaysUsageDescription 。
更新蓝牙插件可解决该问题。
