download image from firebase storage in swift

Question

Have the image location as gs://olio-ae400.appspot.com/Listings/Food/-M3g8pZDGmApicUAQtOi/MainImage

I want to download from this firebase storage location to imageview. Have used below code,but the unable to download image from url?

 let storage = Storage.storage()
 var reference: StorageReference!
       
        reference = storage.reference(forURL: "gs://olio-ae400.appspot.com/Listings/Food/-M3g8pZDGmApicUAQtOi/MainImage")

 reference.downloadURL { (url, error) in
           print("image url is",url!)
            let data = NSData(contentsOf: url!)
            let image = UIImage(data: data! as Data)
            self.img.image = image

        }

Getting error at downloadURL line while retrieving the url for it in the response.

What is the correct way for it to download the image?

Answer 1

Install the pod firebaseUI.

import FirebaseUI

fetch the reference from the storage and set the reference to the imageview directly using SDwebimage as shown below.

let ref2 = Storage.storage().reference(forURL: "gs://hungry-aaf15.appspot.com/Listings/Food/-MV04bNvewyGPHMYUkK9/MainImage") 

cell.img.sd_setImage(with: ref2)

Answer 2

Specify path and it's extension, then Use:

let path = "Listings/Food/-M3g8pZDGmApicUAQtOi/MainImage.jpg"
let reference = Storage.storage().reference(withPath: path) 

reference.getData(maxSize: (1 * 1024 * 1024)) { (data, error) in
        if let err = error {
           print(err)
      } else {
        if let image  = data {
             let myImage: UIImage! = UIImage(data: image)

             // Use Image
        }
     }
}

Answer 3

// Create a reference to the file you want to download
let islandRef = storageRef.child("images/island.jpg")

// Download in memory with a maximum allowed size of 1MB (1 * 1024 * 1024 bytes)
islandRef.getData(maxSize: 1 * 1024 * 1024) { data, error in
  if let error = error {
    // Uh-oh, an error occurred!
  } else {
    // Data for "images/island.jpg" is returned
    let image = UIImage(data: data!)
  }
}
   

Answer 4

For Swift 5.6 and Xcode 13.4

I opened name "Images" folder in Firebase and uploaded my image which name "Corleone" in jpg format.

Firstly I fetch image data then assigned to imageView. Lastly, i downloaded image URL. You can use two method differently.

You can copy all what i wrote and past your project inside of viewDidload or buttonAction.

 let storage = Storage.storage().reference().child("Images/Corleone.jpg")
    
    storage.getData(maxSize: 1 * 1024 * 1024) { data, error in
        if error != nil {
            print(error?.localizedDescription ?? "errror")
        }else{
            let image = UIImage(data: data!)
            self.imageView.image = image
            
            storage.downloadURL { url, error in
                if error != nil {
                    print(error?.localizedDescription ?? "error")
                }else {
                    print(url ?? "url") //https://firebasestorage.googleapis.com/v0/b/epeycompare.appspot.com/o/Images%2FCorleone.jpg?alt=media&token=04c6369d-8036-4aef-8052-bac21c89eeda

                }
            }
        }
    }