我想这可能有用

let path = Bundle.main.url(forResource: "test", withExtension: "png")!
    
do
{
    let data = try Data(contentsOf: path)
    let dataLen = (data as NSData).length
    let fullChunks = Int(dataLen / 1024) // 1 Kbyte
    let totalChunks = fullChunks + (dataLen % 1024 != 0 ? 1 : 0)
        
    var chunks:[Data] = [Data]()
    for chunkCounter in 0..<totalChunks
    {
        var chunk:Data
        let chunkBase = chunkCounter * 1024
        var diff = 1024
        if chunkCounter == totalChunks - 1
        {
            diff = dataLen - chunkBase
        }
            
        let range:Range<Data.Index> = chunkBase..<(chunkBase + diff)
        chunk = data.subdata(in: range)
            
        chunks.append(chunk)
    }
        
    // Send chunks as you want
    debugPrint(chunks)
}
catch
{
    // Handle error        
}