如何比较HMAccessory的实例

时间:2015-12-01 21:13:15

标签: ios9 homekit hmaccessory

自iOS9起,identifier的{​​{1}}属性已被折旧。有没有其他方法来比较两个不同的HMAccessory实例?

3 个答案:

答案 0 :(得分:4)

在iOS 9中确定HMAccessory的新方法是使用

@available(iOS 9.0, *)
@NSCopying public var uniqueIdentifier: NSUUID { get }

答案 1 :(得分:0)

有几种方法可以做到这一点。正如@Maria所提到的,从iOS9开始,你有NSUUID属性'uniqueIdentifier':

@property(readonly, copy, nonatomic) NSUUID *uniqueIdentifier NS_AVAILABLE_IOS(9_0);

此外,您可以使用serialNumber characteristicType来比较HMAccessories,但请记住:您应该检查附件的“可达性”和“阻止”状态。如果配件无法访问或被阻止,则您可能无法读取序列号。

最后,我在Objective C中包含了一个实用程序代码片段(想要Swift?只是问一下,或者更好的是,将它用作练习;)):

/ **   @discussion:如果附件无法访问,则返回空字符串。   无法获取无法访问状态下的实际序列号。*  * /

[请引用您的信息]

+ (NSString *)getSerialNumberFromHMAccessory:(HMAccessory *)accessory {
    if (!accessory || !accessory.reachable || accessory.isBlocked) {
        return @"";
    }

    for (HMService *service in accessory.services) {
        NSPredicate *predicate = [NSPredicate predicateWithFormat:@"%K like %@", @"characteristicType", HMCharacteristicTypeSerialNumber];
        NSArray *result = [service.characteristics filteredArrayUsingPredicate:predicate];

        if (result && [result count] > 0 && [result[0] isKindOfClass:[HMCharacteristic class]]) {
            HMCharacteristic *serialNumChar = (HMCharacteristic *)result[0];
            NSString *serialNum = [serialNumChar valueForKey:@"value"];
            if (serialNum && [serialNum length] > 0) {
                //DDLogInfo(@"Found serial number: %@ for accessory named \"%@\"", serialNum, accessory.name);
                return serialNum;
            }
        }
    }

    return @"";
}

答案 2 :(得分:-1)

好的想出了一个解决方案。有一个HMCharaceteristic HMCharaceteristicTypeSerialNumber。对HMAccessory进行了扩展:

extension HMAccessory {
 var serialNumber: String? {
  get {
   for service in services {
    for characteristic in service.characteristics {
     if characteristic.characteristicType == HMCharacteristicTypeSerialNumber {
      return characteristic.value as? String
     }
    }
   }
   return nil
  }
 }
}

现在可以比较:

accessory1.serialNumber == accessory2.serialNumber

还有其他解决方案吗?