我有两个应用程序，一个作为外围设备（在 iPad 4th Gen 上运行 iOS 7），一个作为中央应用程序（iPhone 5c 运行 iOS7）。
我希望在外围设备中有一个可写的特性，中央写入少量字节（大约 4 个字节，但可能因执行而异）。
我正在配置外围设备如下：
-(void)startPeripheral
{
CBMutableService *service = [[CBMutableService alloc]initWithType:[CBUUID UUIDWithString:kMyServiceUUID] primary:YES];
CBMutableCharacteristic *ch = [[CBMutableCharacteristic alloc]initWithType:[CBUUID UUIDWithString:kMyWriteUUID] properties:CBCharacteristicPropertyWrite value:nil permissions:CBAttributePermissionsWriteable];
service.characteristics = @[ch];
NSDictionary *dict = [NSDictionary dictionaryWithObjectsAndKeys:@[[CBUUID UUIDWithString:kMyServiceUUID]], CBAdvertisementDataServiceUUIDsKey, @"My Peripheral", CBAdvertisementDataLocalNameKey, nil];
[self.peripheralManager addService:service];
[self.peripheralManager startAdvertising:dict];
NSLog(@"Service = %@",service);
}
起初这一切似乎都有效，外围设备发布服务，我的中心可以扫描，查找，发现服务和特性并找到它感兴趣的特性。当我尝试写入特性时问题就来了。
在中央我有以下方法：
-(void)peripheral:(CBPeripheral *)peripheral didDiscoverCharacteristicsForService:(CBService *)service error:(NSError *)error
{
NSLog(@"Service/Characteristics = %@",service.characteristics);
for(CBCharacteristic *ch in service.characteristics)
{
NSLog(@"Characteristic properties = %x",ch.properties);
NSLog(@"Characterisctic = %@",ch.UUID);
if([ch.UUID isEqual:[CBUUID UUIDWithString:kMyWriteUUID]])
{
// We've found our write characteristic
NSLog(@"Writing data to characteristic %@",ch.UUID);
NSData *data = [NSData dataWithBytes:(Byte[]){1,2,3,4} length:4];
[peripheral writeValue:data forCharacteristic:ch type:CBCharacteristicWriteWithResponse];
}
}
}
我收到一个回调到 didWriteValueForCharacteristic，它指示错误：
错误域=CBATTErrorDomain 代码=14“不太可能的错误。”
这不是很有帮助。
任何人都可以发现问题或提出任何解决方案吗？
谢谢，丰富