ios ble - Write Without Response"属性 - 忽略无响应写入

Question

在iOS7.1.1上,以下BLE操作成功 - 它假设我有一个BLE连接设置等...

[[self peripheral]writeValue:dataToWrite forCharacteristic:nextCharacteristic type:CBCharacteristicWriteWithResponse];

但如果我切换"类型" CBCharacteristicWriteWithoutResponse,我得到以下警告,外围设备没有收到命令:(

[[self peripheral]writeValue:dataToWrite forCharacteristic:nextCharacteristic type:CBCharacteristicWriteWithoutResponse];

错误:

CoreBluetooth[WARNING] Characteristic <CBCharacteristic: 0x178081f90 UUID = 249C2001-00D7-4D91-AC75-22D57AE2FFB8, Value = (null), Properties = 0x28, Notifying = YES, Broadcasting = NO> does not specify the "Write Without Response" property - ignoring response-less write**

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Answer 1

当BLE外围设备宣传特征时,广告包括那些特征的属性.其中包括该特性支持的操作 - 无响应读取,通知,写入和响应写入.

在这种情况下,似乎该特性支持写入响应但不支持写入而没有响应,因此当您尝试写入而没有响应时,您会收到警告并且写入操作无法完成