我的CoreBluetooth应用程序需要启用客户端特征配置描述符中的“指示位”.这是我做的：
>开始扫描
>开始连接设备
>调用discoverServices
>在回调中调用discoverCharacteristics
– (void)peripheral：(CBPeripheral *)peripheral diddiscoverServices：(NSError *)错误
>在回调内调用discoverDescriptorsForCharacteristic
– (void)peripheral：(CBPeripheral *)peripheral didDiscoverCharacteristicsForService：(CBService *)service error：(NSError *)error
>内部回调
– (void)peripheral：(CBPeripheral *)peripheral didDiscoverDescriptorsForCharacteristic：(CBCharacteristic *)特征错误：(NSError *)错误
我打了电话：
if ( [[descriptor.UUID representativeString] isEqualToString:@"2902" ] )
{
const unsigned char raw_data[] = {0x02};
NSData *myData = [NSData dataWithBytes: raw_data length: 2];
[self.cBCP writeValue:myData forDescriptor:descriptor];
}
但我的应用程序在writeVale崩溃：.控制台中的错误消息是：
Cannot write Client Characteristic Configuration descriptors using
this method!
任何的想法？谢谢
