蓝牙 LE 请求许可？

Question

我有一个使用 BLE 的应用程序。在某些情况下，例如当安装在 iPhone 6 上时，应用程序正在运行并且不请求使用 BLE 的许可。

在其他情况下，比如我的 iPad Air，应用程序开始运行，并且它没有请求用户对 BLE 的许可，然后 BLE 不工作（尽管设备上的蓝牙已打开）。

即使您不使用该应用程序，该应用程序也希望向附近的蓝牙设备提供数据

下面是来自应用程序的密钥NSBluetoothPeripheralUsageDescription或本地化的 Info.plist 数据Privacy - Bluetooth Peripheral Usage Description

我不明白什么时候应该发生自动权限请求？

• 如何在 iOS 设置中启用特定应用程序以使用 BLE？
• 如何在应用程序内请求许可？

Answer 1

使用以下代码并调用[self detectBluetooth]; 要检查蓝牙连接的函数。

#import <CoreBluetooth/CoreBluetooth.h>


#pragma mark - setUp bluetoothManager

//check bluetooth connection
- (void)detectBluetooth
{
    if(!self.bluetoothManager)
    {
        // Put on main queue so we can call UIAlertView from delegate callbacks.
        self.bluetoothManager = [[CBCentralManager alloc] initWithDelegate:self queue:dispatch_get_main_queue()] ;
    }
    [self centralManagerDidUpdateState:self.bluetoothManager]; // Show initial state
}

- (void)centralManagerDidUpdateState:(CBCentralManager *)central
{
    NSString *stateString = nil;
    switch(bluetoothManager.state)
    {
        case CBCentralManagerStateResetting:
            [self alertStatus:@"The connection with the system service was momentarily lost, update imminent." :@"update imminent" :0];
            break;

        case CBCentralManagerStateUnsupported:
            [self alertStatus:@"The platform doesn't support Bluetooth Low Energy.":@"weak Bluetooth Connection" :0];
            break;

        case CBCentralManagerStateUnauthorized:
            [self alertStatus:@"The app is not authorized to use Bluetooth Low Energy.":@"weak Bluetooth Connection" :0];
            break;
        case CBCentralManagerStatePoweredOff:
            stateString = @"Bluetooth is currently powered off.";
            [self alertStatus:@"Bluetooth is currently powered off , powered ON first.":@"No Bluetooth Connection" :0];
            break;
        case CBCentralManagerStatePoweredOn:
            stateString = @"Bluetooth is currently powered on and available to use.";
            //  [self alertStatus:@"Bluetooth is currently powered ON.":@" Bluetooth available" :0];

            break;
        default:
            stateString = @"State unknown, update imminent.";
            break;
    }

    NSLog(@"Bluetooth State %@",stateString);        
}

@end