iOS Eddystone信标-寻找NamespaceID中的问题

Question

我在Objective中有一个老项目-- C。我需要在最新的SWIFT-5中转换它。除了Eddystone信标探测之外，一切都很正常。

旧目标C代码，

-(NSString *) findNameSpace : (id) beaconInfo {

    ESSBeaconInfo *beacon = beaconInfo;
    ESSBeaconID *Bid = beacon.beaconID;
    NSLog(@"Beacon : %@", beacon);
    NSLog(@"Beacon ID Length : %lu",(unsigned long)Bid.beaconID.length);
    if (Bid.beaconID.length == 16) {
        NSData *d1 = [Bid.beaconID subdataWithRange:NSMakeRange(0, 10)];
        NSLog(@"Sub Data : %@", d1);
        NSString *namespace = [[NSString stringWithFormat:@"%@",d1] stringByReplacingOccurrencesOfString:@"<" withString:@""];
        namespace = [namespace stringByReplacingOccurrencesOfString:@">" withString:@""];
        namespace = [namespace stringByReplacingOccurrencesOfString:@" " withString:@""];
        NSLog(@"namespace : %@", namespace);
        return namespace;
    }

    return @"";
}

输出：-

信标: Eddystone，id: ESSBeaconID: beaconID=

，RSSI：-65，txPower：-31

信标ID长度: 16

次级数据：

​

命名空间: a457ae5727fa30f48dc9

我的快速代码，

func findNameSpace(_ beaconInfo: Any) -> String? {
        let beacon: ESSBeaconInfo = beaconInfo as! ESSBeaconInfo
        let Bid: ESSBeaconID = beacon.beaconID
        print("Beacon : \(beacon)")
        print("Beacon ID Length : \(Bid.beaconID.count)")
        if Bid.beaconID.count == 16 {
            let d1 = Bid.beaconID.subdata(in: Range(NSRange(location: 0, length: 10))!)
            print("Sub Data : \(d1)")
            var namespace: String? = nil
            namespace = "\(d1)".replacingOccurrences(of: "<", with: "")
            namespace = namespace?.replacingOccurrences(of: ">", with: "")
            namespace = namespace?.replacingOccurrences(of: " ", with: "")
            print("namespace : \(namespace ?? "")")
            return namespace
        }
        return ""
    }

输出：-

信标: Eddystone，id: ESSBeaconID: beaconID=

，RSSI：-51，txPower：-31

信标ID长度: 16

子数据: 10字节

命名空间:10字节

========================================

我面临着获取命名空间的问题。因为你可以从上面的输出中看到。数据正在以字节为单位在我的Swift代码中转换。我不知道该怎么处理。目标C代码工作得很好。任何帮助都是非常感谢的！谢谢。

Answer 1

这就是解决办法，在我的情况下是有效的。

在此张贴答案，帮助那些可能面临同样问题的人。希望它能对某人有所帮助！

func findNameSpace(_ beaconInfo: Any) -> String? {
        let beacon: ESSBeaconInfo = beaconInfo as! ESSBeaconInfo
        let Bid: ESSBeaconID = beacon.beaconID
        print("Beacon : \(beacon)")
        print("Beacon ID Length : \(Bid.beaconID.count)")
        if Bid.beaconID.count == 16 {
            let d1 = Bid.beaconID.subdata(in: Range(NSRange(location: 0, length: 10))!)
            print("Sub Data : \(d1)")
            var namespace: String? = nil
            namespace = "\(d1.hexEncodedString())".replacingOccurrences(of: "<", with: "")
            namespace = namespace?.replacingOccurrences(of: ">", with: "")
            namespace = namespace?.replacingOccurrences(of: " ", with: "")
            print("namespace : \(namespace ?? "")")
            return namespace
        }
        return ""
    }

func hexEncodedString(options: HexEncodingOptions = []) -> String {
        let format = options.contains(.upperCase) ? "%02hhX" : "%02hhx"
        return map { String(format: format, $0) }.joined()
    }