isScanning method
判断当前是否正在扫描。
无参数。Android 同时包含 BLE 扫描和 Classic discovery;Linux 反映 BlueZ
Discovery 状态;iOS/macOS/Windows 仅包含 BLE 扫描;Web 仅在浏览器设备选择器打开期间
返回 true。
Implementation
Future<bool> isScanning() {
throw UnimplementedError('isScanning() has not been implemented.');
}