2014/10/15 下午 10:04:56

iphone Programming Glossary: cbcentralmanager

Corebluetooth central manager callback didDiscoverPeripheral twice

http://stackoverflow.com/questions/11557500/corebluetooth-central-manager-callback-diddiscoverperipheral-twice

peripheral like this NSDictionary scanOptions NSDictionary dictionaryWithObject NSNumber numberWithBool NO forKey CBCentralManagerScanOptionAllowDuplicatesKey Scan for peripherals with given UUID cm scanForPeripheralsWithServices NSArray arrayWithObject.. options scanOptions No problem there I find the peripheral and are able to connect to it. As you can see I give it CBCentralManagerScanOptionAllowDuplicatesKey with bool NO to not allow for more than one peripheral but sometimes the didDiscoverPeripheral.. allow for more than one peripheral but sometimes the didDiscoverPeripheral callback fires twice. void centralManager CBCentralManager central didDiscoverPeripheral CBPeripheral peripheral advertisementData NSDictionary advertisementData RSSI NSNumber RSSI..

Finding Distance from RSSI value of bluetooth low energy enable device

http://stackoverflow.com/questions/13705647/finding-distance-from-rssi-value-of-bluetooth-low-energy-enable-device

am getting the RSSI value of the device with the help of this bluetooth Low energy delegate method void centralManager CBCentralManager central didDiscoverPeripheral CBPeripheral peripheral advertisementData NSDictionary advertisementData RSSI NSNumber RSSI..

Bluetooth connection between 2 iOS devices

http://stackoverflow.com/questions/13857143/bluetooth-connection-between-2-ios-devices

This is my code stripped down to a small test project . ViewController.h @interface ViewController UIViewController CBCentralManagerDelegate CBPeripheralDelegate @property strong nonatomic CBCentralManager mCentralManager @end ViewController.m @implementation.. @interface ViewController UIViewController CBCentralManagerDelegate CBPeripheralDelegate @property strong nonatomic CBCentralManager mCentralManager @end ViewController.m @implementation ViewController @synthesize mCentralManager void viewDidLoad super.. @implementation ViewController @synthesize mCentralManager void viewDidLoad super viewDidLoad mCentralManager CBCentralManager alloc initWithDelegate self queue nil self scanForPeripherals void centralManager CBCentralManager central didDiscoverPeripheral..

how some apps can open setting app programmatically within their app

http://stackoverflow.com/questions/14587370/how-some-apps-can-open-setting-app-programmatically-within-their-app

open preferences is because they ask for permission to use Bluetooth Low Energy. Asking for permission is managed by CBCentralManager on first usage. This is also the class that knows if Bluetooth is turned on or off. It will show an alert automatically..

When would CBCentralManager's state ever be powered on but still give me a “not powered on” warning?

http://stackoverflow.com/questions/17118534/when-would-cbcentralmanagers-state-ever-be-powered-on-but-still-give-me-a-not

would CBCentralManager's state ever be powered on but still give me a &ldquo not powered on&rdquo warning I keep getting this error when I run.. an iPhone 5 CBConcreteCentralManager 0x2007d590 is not powered on But when I call state on my program's one and only CBCentralManager object it returns 5 which is CBCentralManagerStatePoweredOn. So it's powered on yet I get this error. The iPhone's Bluetooth.. is not powered on But when I call state on my program's one and only CBCentralManager object it returns 5 which is CBCentralManagerStatePoweredOn. So it's powered on yet I get this error. The iPhone's Bluetooth is also enabled. Just in general when would..

How to get the status of bluetooth (ON/OFF) in iphone programatically

http://stackoverflow.com/questions/4955007/how-to-get-the-status-of-bluetooth-on-off-in-iphone-programatically

permission to use the bluetooth stack from the user may not be desired and if they refuse the only thing you'll see is CBCentralManagerStateUnauthorized Retrieval of bluetooth state is async and continuous. You will need to setup a delegate to get state changes.. to setup a delegate to get state changes as checking the state of a freshly allocated bluetooth manager will return CBCentralManagerStateUnknown That being said this method does seem to provide real time updates of bluetooth stack state. After including.. 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 autorelease self centralManagerDidUpdateState self.bluetoothManager..