ios - Firebase 存储如何在 Swift 中获取上传图片的进度

Question

我正在尝试获取上传图片的进度，我看到了下面的解释链接。但是我想要做的是上传多张图片。

link here

我是这样实现上传图片的。

 for image in imagesArray {
            let postRef = ref.child("post").child(uid)("images")
            let autoId = postRef.childByAutoId().key
            let childStorageRef = storageRef.child("images").child(autoId)

            if let uploadData = UIImagePNGRepresentation(image) {
                childStorageRef.putData(uploadData, metadata: nil, completion: { (metadata, error) in
                    if error != nil {
                        print("error")
                        return
                    } else {
                        if let imageUrl = metadata?.downloadURL()?.absoluteString {
                            let val = [autoId: imageUrl]
                            postRef.updateChildValues(val)
                        }
                    }
                })
            }
        }

我试过调用 observe(.progress)

但是只有childStorageRef.observe(<#T##keyPath: KeyPath<StorageReference, Value>##KeyPath<StorageReference, Value>#>, options: <#T##NSKeyValueObservingOptions#>, changeHandler: <#T##(StorageReference, NSKeyValueObservedChange<Value>) -> Void#>)

所以，我不知道如何获得像链接这样的进度。 我怎样才能做到这一点？提前致谢!

Answer 1

Swift- 5 简单方法

let storageRef = FIRStorage.reference().child("folderName/file.jpg");
let localFile: NSURL = // get a file;

// Upload the file to the path "folderName/file.jpg"
let uploadTask = storageRef.putFile(localFile, metadata: nil)
uploadTask.observe(.progress) { snapshot in            
    print(snapshot.progress) // NSProgress object
}