解析 Bonjour 的 TXTRecord 数据

NSNetService+ResolveTXTRecord.swift

func resolveDictionary(fromTXTRecord data: Data) -> [String: String] {
    var dict = [String: String]()
    var offset = 0
    let bytes = data.bytes
    while offset < bytes.count {
        let recordLength = Int(bytes[offset])
        offset += 1
        print(recordLength)
        if recordLength > 0 {
            let subBytes = bytes[offset..<offset + recordLength]
            let compoments = subBytes.split(separator: 61)
            if compoments.count == 2 {
                let key = Data(compoments[0]).utf8StringValue
                let value = Data(compoments[1]).utf8StringValue
                print("key: \(key), value: \(value)")
                dict[key] = value
            }
        }
        offset += recordLength
    }
    return dict
}