alamofire 如何获取部分下载的数据？

Posted 2023-02-24

【中文标题】alamofire 如何获取部分下载的数据？

【英文标题】：alamofire how to obtain partially downloaded data?

【发布时间】：2017-09-06 17:21:59

【问题描述】：

我想显示部分下载数据。在downloadProgress 回调中，我可以访问进度实例，并以字节或百分比为单位。但是如何访问部分下载的数据？

【参考方案1】：

我在 Alamofire 的来源中找到了它：

// MARK: Stream
/// Sets a closure to be called periodically during the lifecycle of the request as data is read from the server.
///
/// This closure returns the bytes most recently received from the server, not including data from previous calls.
/// If this closure is set, data will only be available within this closure, and will not be saved elsewhere. It is
/// also important to note that the server data in any `Response` object will be `nil`.
///
/// - parameter closure: The code to be executed periodically during the lifecycle of the request.
///
/// - returns: The request.
@discardableResult
open func stream(closure: ((Data) -> Void)? = nil) -> Self 
    dataDelegate.dataStream = closure
    return self