Checking if Bluetooth is Disabled on iOS 5 without BluetoothManager
cocoa-touch, core-bluetooth, gamekit, ios, iphone
Solution
Ok, I discovered that by doing this:
NSDictionary *options = [NSDictionary dictionaryWithObjectsAndKeys:[NSNumber numberWithBool:FALSE], CBCentralManagerScanOptionAllowDuplicatesKey, nil];
NSMutableArray * discoveredPeripherals = [NSMutableArray new];
CBCentralManager * manager = [[CBCentralManager alloc] initWithDelegate:self queue:nil];
[manager scanForPeripheralsWithServices:discoveredPeripherals options:options];
[manager stopScan];
If bluetooth is off, the system will pop up an alert view which will offer the choice to turn bluetooth on. Otherwise, if it finds a peripheral it will call a corresponding delegate method, but if there is nothing in that implementation you don't need to worry about it.
Problem
I have seen that in iOS 5, CoreBluetooth provides the capability to check if Bluetooth is disabled. From what I have seen of the documentation, it is clearly aimed at bluetooth peripheral use. However, I am attempting to check if bluetooth is on because I am using GameKit (`GKPeerPickerController`) that will search endlessly for bluetooth connections if it is not enabled, which is an issue. I tried to do this like so: ``` CBCentralManager * manager = [[CBCentralManager alloc] init]; if (manager.state == CBCentralManagerStatePoweredOn ) { //go ahead with GameKit } ``` This does not work, and `manager.state` is always equal to null. What am I doing wrong here? Or alternatively, are there better ways to check the status of bluetooth on the iPhone? EDIT: I don't want to call any private APIs because I will be submitting this app to the app store. I have edited my question title to clarify this.