Firebase storage how to get uploading images progress in Swift - ios

Question

I'm trying to get progress of uploading images and I saw the explanation link below. However what I want to do is uploading multiple images.
link here
I implemented like this to upload images.
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)
}
}
})
}
}
I tried call observe(.progress)
But there is only childStorageRef.observe(<#T##keyPath: KeyPath<StorageReference, Value>##KeyPath<StorageReference, Value>#>, options: <#T##NSKeyValueObservingOptions#>, changeHandler: <#T##(StorageReference, NSKeyValueObservedChange<Value>) -> Void#>)
So, I don't know how to get progress like link.
How can I achieve this? Thank you in advance!

Answer 1

Swift- 5 Easy Way
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
}

Answer 2

1. First, create a variable of your query:
(Just add "let uploadTask = " before the query)
Example: let uploadTask = childStorageRef.putData(uploadData, metadata: nil, completion: { (metadata, error) in...
2. Then you can call this observers:
(Observe progress)
uploadTask.observe(.progress, handler: { (snapshot) in
or
(Observe when success)
uploadTask.observe(.success, handler: { (snapshot) in
or
(Observe if fail)
uploadTask.observe(.failure, handler: { (snapshot) in