Java to Swift 5: Code Conversion for Device UID Verification

以下是将Java代码转换为Swift 5代码的结果：

import Foundation

func checkDeviceUidByKey(_ deviceUid: String, _ key: String) -> Int {
    let sha1Length = 20
    let checkString = ConfigManager.ProgramName + deviceUid + 'DES3'
    let checkBytes = Array(checkString.utf8)
    let keyBytes = Array(key.utf8)
    var decodeKey = [UInt8](repeating: 0, count: key.count / 2)
    var crcString = [UInt8](repeating: 0, count: checkBytes.count + sha1Length)
    var i, j, k: Int
    var crcValue: UInt32
    
    // decode key.
    j = 0
    for i in 0..<key.count {
        k = i % (26 - 16)
        decodeKey[j] = keyBytes[i] - UInt8(UnicodeScalar('A').value) - UInt8(k)
        i += 1
        k = i % (26 - 16)
        decodeKey[j] = (decodeKey[j] << 4) + (keyBytes[i] - UInt8(UnicodeScalar('A').value) - UInt8(k))
        j += 1
    }
    
    // build string
    crcString[0..<checkBytes.count] = checkBytes
    crcString[checkBytes.count..<(checkBytes.count + sha1Length)] = decodeKey[0..<sha1Length]
    
    var crc32 = CRC32()
    crc32.update(data: crcString)
    crcValue = crc32.value
    
    var bBuf = ByteBuffer.allocate(capacity: 8)
    bBuf.putLong(value: crcValue)
    let crcResult = bBuf.array()
    for i in 0..<4 {
        if decodeKey[sha1Length + i] != crcResult[4 + i] {
            return 0
        }
    }
    
    return 1
}

请注意，此转换代码是基于你提供的Java代码，但是缺少ConfigManager类和CRC32类的定义。你需要根据Swift代码库中可用的适当类来替换这些引用。