核心藍牙狀態恢復

Question

我的工作是在外設上的斷開反應的程序，現在我試圖採用NE狀態保存和恢復的iOS推出7

我不喜歡的文件說的一切，手段：

1. 我爲中央添加了背景模式。

2. 我總是使用相同的唯一 標識符實例化我的中央管理器。

3. 我執行centralManager:willRestoreState:方法。

當我的應用程序移動到後臺時，我在AppDelegate回調中用kill(getpid(), SIGKILL);殺死它。 （Core Bluetooth State Preservation and Restoration Not Working, Can't relaunch app into background）

當我現在通過刪除電池斷開外圍設備時，我的應用正在按預期方式被喚醒，並且launchOptions[UIApplicationLaunchOptionsBluetoothCentralsKey]包含正確的標識符，但centralManager:willRestoreState:未被調用。 只有當我斷開另一個外設時，這個方法纔會被調用。

Answer 1

這是我知道了：

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions 
{ 

    NSArray *peripheralManagerIdentifiers = launchOptions[UIApplicationLaunchOptionsBluetoothPeripheralsKey]; 

    if (peripheralManagerIdentifiers) { 

     // We've restored, so create the _manager on the main queue 
     _manager = [[CBPeripheralManager alloc] initWithDelegate:self 
                  queue:dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0) 
                 options:@{CBPeripheralManagerOptionRestoreIdentifierKey:@"YourUniqueIdentifier"}]; 

    } else { 

     // Not restored so just create as normal 
     manager = [[CBPeripheralManager alloc] initWithDelegate:self 
                  queue:nil 
                 options:@{CBPeripheralManagerOptionRestoreIdentifierKey:@"YourUniqueIdentifier"}]; 

    } 
return YES; 
} 

然後：

- (void)peripheralManager:(CBPeripheralManager *)peripheral 
     willRestoreState:(NSDictionary *)dict 
{ 


    // This is the advertisement data that was being advertised when the app was terminated by iOS 
    _advertisementData = dict[CBPeripheralManagerRestoredStateAdvertisementDataKey]; 

    NSArray *services = dict[CBPeripheralManagerRestoredStateServicesKey]; 

    // Loop through the services, I only have one service but if you have more you'll need to check against the UUID strings of each 
    for (CBMutableService *service in services) { 

     _primaryService = service; 

     // Loop through the characteristics 
     for (CBMutableCharacteristic *characteristic in _primaryService.characteristics) { 

      if ([characteristic.UUID.UUIDString isEqualToString:CHARACTERISTIC_UUID]) { 

       _primaryCharacteristic = characteristic; 

       NSArray *subscribedCentrals = characteristic.subscribedCentrals; 

       // Loop through all centrals that were subscribed when the app was terminated by iOS 
       for (CBCentral *central in subscribedCentrals) { 

        // Add them to an array 
        [_centrals addObject:central]; 

       } 
      } 
     } 
    } 
}