如何获得蓝牙技术在iphone的状态（ON / OFF）编程 [英] How to get the status of bluetooth (ON/OFF) in iphone programatically

问题描述

我试图让iPhone / iPod的蓝牙的状态即无论是ON或OFF编程。
是否有可能使用一些苹果的API或第三方API。
任何建议将是有益的。

I trying to get the Status of iPhone/iPod Bluetooth that whether it is ON or OFF programmatically. Is it possible using some Apple API or third party API. Any suggestion would be helpful.

推荐答案

研究一点点进入萨姆的回答是我想我会分享
你可以这样做，而无需使用私有API，但有一些注意事项：

A little bit of research into Sam's answer that I thought I'd share You can do so without utilizing private API, but with a few caveats:

• 它只能在iOS 5.0+工作


• 这将只对设备的工作，
  支持蓝牙LE规范（iPhone 4S的+，第五代iPod +，iPad的
  第三代+）


• 简单地分配类将导致应用程序请求允许使用的蓝牙堆栈从用户（可能不期望的），如果他们拒绝，你会看到的唯一事情是CBCentralManagerStateUnauthorized

蓝牙状态
• 检索是异步，和连续。您将需要设置一个代理获得的状态变化，检查新分配的蓝牙管理器的状态将返回CBCentralManagerStateUnknown

话虽这么说，这个方法似乎提供蓝牙堆栈状态的实时更新。

That being said, this method does seem to provide real time updates of bluetooth stack state.

包括CoreBluetooth框架后，

After including the CoreBluetooth framework,

#import <CoreBluetooth/CoreBluetooth.h>

这些测试很容易使用执行：

These tests were easy to perform using:

- (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()] autorelease];
    }
    [self centralManagerDidUpdateState:self.bluetoothManager]; // Show initial state
}

- (void)centralManagerDidUpdateState:(CBCentralManager *)central
{
    NSString *stateString = nil;
    switch(bluetoothManager.state)
    {
        case CBCentralManagerStateResetting: stateString = @"The connection with the system service was momentarily lost, update imminent."; break;
        case CBCentralManagerStateUnsupported: stateString = @"The platform doesn't support Bluetooth Low Energy."; break;
        case CBCentralManagerStateUnauthorized: stateString = @"The app is not authorized to use Bluetooth Low Energy."; break;
        case CBCentralManagerStatePoweredOff: stateString = @"Bluetooth is currently powered off."; break;
        case CBCentralManagerStatePoweredOn: stateString = @"Bluetooth is currently powered on and available to use."; break;
        default: stateString = @"State unknown, update imminent."; break;
    }
    UIAlertView *alert = [[[UIAlertView alloc] initWithTitle:@"Bluetooth state"
                                                     message:stateString
                                                    delegate:nil
                                           cancelButtonTitle:@"Okay" otherButtonTitleArray:nil] autorelease];
    [alert show];
}

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