swift - 在 Swift 4 中将图像上传到 Firebase 存储

Question

我想为每张图片上传两份副本，一张全尺寸和一张缩略图。我在这里寻找关于 SO 和 Firebase 文档的答案。

使用下面的代码，只有缩略图图像被保存到存储中。我怎样才能修复它以便上传两个图像？显然我还没有完全理解如何处理返回/关闭。帮助非常感谢!

这一系列方法在用户点击上传按钮时被调用

self.uploadAndGetFullSizeImageDownloadURL(completion: { (url) in

                print("Fullsize URL: \(url) is stored")
                self.fullSizeDownloadURL = url

                self.uploadAndGetThumbNailImageDownloadURL(completion: { (url) in
                    print("Thumbnail URL: \(url) is stored")
                    self.thumbNailDownloadURL = url

                    // Save image info to database
                    self.saveImageInfoToDatabase(fullSizeURL: self.fullSizeDownloadURL, thumbNailURL: self.thumbNailDownloadURL, completion: { (finished) in

                        ...
                    })
                })
            })

上传和获取 URL 的方法如下所示:

func uploadAndGetFullSizeImageDownloadURL(completion: @escaping (String) -> Void) {

    var fullUrlStr = ""

    // Get imageData
    let fullSizeImageData = self.getImageData(size: "fullSize")

    // Upload fullsize image to storage
    let fullSizeStorageRef = self.sRef.child("\(String(describing: uid!)), \(createdAt!)")
    fullSizeStorageRef.putData(fullSizeImageData, metadata: nil, completion: {
        (metadata, error) in

        print("Fullsize image is stored")

        // Get the fullsize downloadURL
        fullSizeStorageRef.downloadURL(completion: { (url, error) in
            if let downloadURL = url?.absoluteString {
                fullUrlStr = downloadURL
                //Return fullsize downloadURL
                completion(fullUrlStr)
            }
        })
    })
}

Answer 1

找到了一个方法: How to upload multiple image on firebase using swift?

这是一种不同的方法，但效果很好。