Firebase putData函数 [英] Firebase putData function

问题描述

我正在使用Xcode，Swift 3.我正在尝试为图像(PNG)调用putData，这是我的代码:

I am using Xcode, Swift 3. I am trying to call putData for an image (PNG), and this is my code :

let storageRef = Storage.storage().reference().child("ProductsImages").child(product.UniqueID()).child("MainImage.png")
    if let mainChosenImage = self.selectedImageToUpload
    {
        if let uploadData = UIImagePNGRepresentation(mainChosenImage)
        {
            storageRef.putData(uploadData, metadata: nil, completion:
                {
                    (StorageMetaData, error) in
                    if error != nil
                    {
                        print(error)
                        return
                    }

                    self.mainImageURL = StorageMetaData?.downloadURL()?.absoluteString
            })
        }
    }

行为是这样-图像可以很好地保存到Firebase，但是不调用完成".含义-它不会检查错误！= nil，更重要的是-它不会使用绝对URL字符串实例化mainImageURL.

And the behavior is this - the image is saved fine to Firebase, but "completion" isn't called. Meaning - it won't check if error != nil, and more importantly - it won't instantiate mainImageURL with the absolute URL string.

关于如何解决此问题的任何想法?

Any ideas on how to fix this ?

推荐答案

完成应如下所示

 if let uploadData = UIImagePNGRepresentation(self.myImageView.image!) {
    storageRef.put(uploadData, metadata: nil) { (metadata, error) in
        if error != nil {
            print("error")

        } else {

            // your uploaded photo url.
        }
   }

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