Question

在applicationDidEnterBackground或applicationWillResignActive后我需要startAdvertising，但我收到此错误：

CoreBluetooth[API MISUSE] <CBPeripheralManager: 0x146a4e30> can only accept this command while in the powered on state.

我用：

- (void)applicationWillResignActive:(UIApplication *)application
{
    _locationManager = [[CLLocationManager alloc] init];
    _locationManager.delegate = self;
    [_locationManager stopRangingBeaconsInRegion:_runningBeacon];
    NSLog(@"stop monitoring");
    NSUUID *uuid = [[NSUUID alloc] initWithUUIDString:@"23542266-18D1-4FE4-B4A1-23F8195B9D39"];
    self.beaconRegion = [[CLBeaconRegion alloc] initWithProximityUUID:uuid major:1 minor:1 identifier:@"com.devfright.myRegion"];
    self.beaconPeripheralData = [self.beaconRegion peripheralDataWithMeasuredPower:nil];
    self.peripheralManager = [[CBPeripheralManager alloc] initWithDelegate:self queue:nil options:nil];
    [self.peripheralManager startAdvertising:self.beaconPeripheralData];

    if ([self.peripheralManager isAdvertising]) {
        NSLog(@"peripeheralManager is advertising");
    }
}

任何帮助将不胜感激..

Answer 1

如果您想主动从您的应用中发送 BT广告数据，我认为您的应用必须在前台。这来自Apple Class Reference

[..]数据广告是在“尽力而为”的基础上完成的，因为空间有限，并且可能会有多个应用同时广告。 当您的应用位于前台时，对于支持的广告数据键的任意组合，它可以在初始广告数据中使用最多28个字节的空间[..]

在后台，你只能收听信标。为此，您必须将您的应用和信标数据注册到CLLocationManager

Answer 2

要消除此错误，请等待在委托方法peripheralManagerDidUpdateState中调用CBPeripheralManager方法startAdvertising：。这里的关键是在执行任何CBPeripheralManager方法之前确保外围状态始终等于CBPeripheralManageStatePoweredOn。

iBeacon开始在应用程序上做广告确实进入后台

2 个答案: