无法在ios 8中连接蓝牙设备，即使现有代码找不到蓝牙，主要问题是它在ios 7上运行得很好

在ios 8中连接蓝牙设备（如腕带）时出现问题，即使现有代码没有找到蓝牙，主要问题是它在ios 7上工作得很好。我的代码如下 建议我ios 8中蓝牙的任何想法或更改

-(void)connecttodevice { 
     // Scan for all available CoreBluetooth LE devices 
     NSArray *services = @[[CBUUID UUIDWithString:info_UUID],[CBUUID UUIDWithString:info_UUID_service],[CBUUID UUIDWithString:BAND_SERVICE_INFO]]; 
     NSLog(@"device connting....."); 
     CBCentralManager *centralManager = [[CBCentralManager alloc] initWithDelegate:self queue:nil]; 
     [centralManager scanForPeripheralsWithServices:services options:nil]; 
     self.centralManager = centralManager; 
 } 

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您的问题是，您在创建CBCentralManager后立即调用scanForPeripheralsWithServices，而不是等到CentralManagerDipDateState委托中指示的中央管理器处于通电状态

- (void)centralManagerDidUpdateState:(CBCentralManager *)central

     if (central.state == CBCentrallManagerStatePoweredOn {
        NSArray *services = @[[CBUUID UUIDWithString:info_UUID],[CBUUID UUIDWithString:info_UUID_service],[CBUUID UUIDWithString:BAND_SERVICE_INFO]]; 
        NSLog(@"device connting....."); 
        [central scanForPeripheralsWithServices:services options:nil];
     }
}

---

在iOS 7中，在指示开机状态之前启动扫描会在控制台上发出警告。在iOS 8中，它不会启动扫描。

您的问题是，您在创建CBCentralManager后立即调用scanForPeripheralsWithServices，而不是等到CentralManager处于开机状态（如CentralManagerDipDateState委托所示）

- (void)centralManagerDidUpdateState:(CBCentralManager *)central

     if (central.state == CBCentrallManagerStatePoweredOn {
        NSArray *services = @[[CBUUID UUIDWithString:info_UUID],[CBUUID UUIDWithString:info_UUID_service],[CBUUID UUIDWithString:BAND_SERVICE_INFO]]; 
        NSLog(@"device connting....."); 
        [central scanForPeripheralsWithServices:services options:nil];
     }
}

---

在iOS 7中，在指示开机状态之前启动扫描会在控制台上发出警告。在iOS 8中，它不会启动扫描。

-voidconnecttodevice{//扫描所有可用的CoreBluetooth LE设备NSArray*服务=@[[CBUUID UUIDWithString:info\u UUID]，[CBUUID UUIDWithString:info\u UUID\u service]，[CBUUID UUIDWithString:BAND\u service\u info]；NSLog@device连接….；CBCentralManager*centralManager=[[CBCentralManager alloc]initWithDelegate:self queue:nil]；[centralManager ScanFor PeriphersWithServices:services options:nil]；self.centralManager=centralManager；}-voidconnecttodevice{//扫描所有可用的CoreBluetooth设备NSArray*服务=@[[CBUUID UUID UUID WithString:info_UID]，[CBUUID UUIDWithString:info_UUID_service]，[CBUUID UUIDWithString:BAND_service_info]；NSLog@device连接….；CBCentralManager*centralManager=[[CBCentralManager alloc]initWithDelegate:self-queue:nil]；[centralManager扫描外围设备服务：服务选项：nil]；self.centralManager=centralManager；}