#define kConnecterManager [ConnecterManager sharedInstance]
#pragma mark - ******** 监听蓝牙状态
//block
+ (void)listenBluetoothpoweredState:(void(^)(CBPeripheral * _Nullable peripheral))peripheral {
    if (kConnecterManager.bleConnecter == nil) {
        [kConnecterManager centralmanager];
        [kConnecterManager didUpdateState:^(NSInteger state) {
            [self setupState:state peripheral:peripheral];
        }];
    }
         else {// 需要获取蓝牙的连接状态
             [self setupState:[kConnecterManager centralmanager].state peripheral:peripheral];
    }
}

/**
 用于统一处理蓝牙状态的判断
 @param state <#state description#>
 @param peripheral <#peripheral description#>
 */
+ (void)setupState:(NSInteger)state peripheral:(void(^)(CBPeripheral * _Nullable peripheral))peripheral{
    switch (state) {
        case CBCentralManagerStateUnsupported:
            NSLog(@"The platform/hardware doesn't support Bluetooth Low Energy.");
            break;
            // CBManagerStateUnauthorized,3//                NSLog(@"手机蓝牙功能关闭，请前往设置打开蓝牙及控制中心打开蓝牙。"); break;
#pragma mark - ******** 没有授权
        case CBCentralManagerStateUnauthorized:
            NSLog(@"The app is not authorized to use Bluetooth Low Energy.");
            //
            [self setupBLEUnauthorized];
            break;
            //CBManagerStatePoweredOff
            #pragma mark - ******** 电源关闭
        case CBCentralManagerStatePoweredOff:
            NSLog(@"Bluetooth is currently powered off.");
            //  第一次系统会提示
            if(QCTSession.shareQCTSession.isNOFirstShowBLEPowOff){
                [self setupBLEOff];
            }else{
                QCTSession.shareQCTSession.isNOFirstShowBLEPowOff= YES;
            }
            break;
        case CBCentralManagerStatePoweredOn:
            [self startScane:peripheral];
            NSLog(@"Bluetooth power on");
            break;
        case CBCentralManagerStateUnknown:
        default:
            break;
    }
}
+ (void) setupBLEUnauthorized{
    // 弹窗提示
    [QCTLocationServiceUtil setupCentralManagerState_not_authorized];
// 关闭蓝牙的时候更新蓝牙状态为断开
    [QCTSession clearPrintInfo];
    // 通知控制器更新以配对设备列表信息
    [[NSNotificationCenter defaultCenter] postNotificationName:QCTQCTBluetoothListViewControllerreloadDateNotification object: nil];
}
+ (void) setupBLEOff{
    // 弹窗提示
    [QCTLocationServiceUtil setupCentralManagerStatePoweredOff];
// 关闭蓝牙的时候更新蓝牙状态为断开
    [QCTSession clearPrintInfo];
    // 通知控制器更新以配对设备列表信息
    [[NSNotificationCenter defaultCenter] postNotificationName:QCTQCTBluetoothListViewControllerreloadDateNotification object: nil];
}

+ (void) setupCentralManagerState_not_authorized{
    NSString *tips = @"手机蓝牙功能没有权限，请前往设置。";
    [LBAlertController showAlertTitle:@"无法使用蓝牙" content:tips cancelString:@"确定" cancleBlock :^{
        //        322
        if([[UIApplication sharedApplication] canOpenURL:[NSURL URLWithString:UIApplicationOpenSettingsURLString]]){
            [[UIApplication sharedApplication] openURL:[NSURL URLWithString:UIApplicationOpenSettingsURLString]];
        }
    }   sureString:nil sureBlock:nil currentController:[QCT_Common getCurrentVC]];
}

NSString *tips = @"手机蓝牙功能关闭，请前往设置打开蓝牙及控制中心打开蓝牙。";
    [LBAlertController showAlertTitle:@"无法使用蓝牙" content:tips cancelString:@"确定" cancleBlock :^{
        //        322
        if([[UIApplication sharedApplication] canOpenURL:[NSURL URLWithString:UIApplicationOpenSettingsURLString]]){
//            [[UIApplication sharedApplication] openURL:[NSURL URLWithString:UIApplicationOpenSettingsURLString]];
        }
    }   sureString:nil sureBlock:nil currentController:[QCT_Common getCurrentVC]];

方式一：prefs:root=某项服务 适用于 小于 iOS10的系统；
 方式二：prefs:root=bundleID 适用于 大于等于iOS8系统，小于iOS10的系统
 方式三: UIApplicationOpenSettingsURLString
 version >= iOS10，支持跳转到自己应用设置，不支持跳转到系统设置

NSURL *url = [NSURL URLWithString:@"App-Prefs:root=Bluetooth"];
 以上写法，上传APPStore的时候，会被拒，可以修改成以下写法：
 // 将字符串转换成16进制，转换一下，再去调用，成不成功，就看脸了
 NSData *encryptString = [[NSData alloc] initWithBytes:(unsigned char []){0x41, 0x70, 0x70, 0x2d, 0x50, 0x72, 0x65, 0x66, 0x73, 0x3a, 0x72, 0x6f, 0x6f, 0x74, 0x3d, 0x42, 0x6c, 0x75, 0x65, 0x74, 0x6f, 0x6f, 0x74, 0x68} length:24];
 NSString *string = [[NSString alloc] initWithData:encryptString encoding:NSUTF8StringEncoding];