Question

我目前在存储数据库中保存用户图像的代码是：

            if let uploadData = UIImagePNGRepresentation(self.profileImage.image!)
            {


                storage.put(uploadData, metadata: nil, completion: { (metadata, error) in

                    if error != nil {
                        print(error!)
                        return
                    }
                    print(metadata!)
                })
            }

所以我的问题是如何将图片网址恢复到我的firebase数据库？我有用户信息，我存储在user.uid中，如下所示：

            let ref = FIRDatabase.database().reference(fromURL: "https://databaseURL.firebaseio.com/")

            let userReference = ref.child("Users").child(uid)

            let values: [String : Any] = ["Full name": name, "Email": email, "Username": username]


            userReference.updateChildValues(values, withCompletionBlock: { (err, ref) in

                if err != nil {

                    return
                }

                let storyBoard : UIStoryboard = UIStoryboard(name: "Main", bundle:nil)

                let nextViewController = storyBoard.instantiateViewController(withIdentifier: "Homepage") as! homepageViewController

                self.present(nextViewController, animated:true, completion:nil)

                //stops loading
                self.loadingIndicator.stopAnimating()
            })

那么如何将图像URL存储到我为每个用户提供的JSON中呢？

规则：

{

"rules":
 {

".read": "auth != null",


".write": "auth != null"
}

}

Answer 1

首先在podfile中添加FirebaseUI和SDWebImage并安装。
创建存储参考（请参阅Firebase文档）：https://Firebase.google.com/docs/storage/ios/download-files
现在，您可以直接从Firebase Storage gs URL加载图片，无需存储任何HTTP URL Firebase将在内部为您完成所有操作。

您可以在Firebase数据库中保存特定图像的参考名称，以识别该特定图像。

来自Firebase doc的示例：

 // Reference to an image file in Firebase Storage
 let reference = storageRef.child("images/stars.jpg")

// UIImageView in your ViewController
let imageView: UIImageView = self.imageView

// Placeholder image
let placeholderImage = UIImage(named: "placeholder.jpg")

// Load the image using SDWebImage
imageView.sd_setImage(with: reference, placeholderImage: placeholderImage)

Answer 2

Swift 4.1简单解决方案：-

从：-
获取存储的图像的完整路径URL

  // Create a reference from a Google Cloud Storage URI
            let gsReference = Storage.storage().reference(forURL:  "gs://<your-firebase-storage-bucket>/imageFolder/abc.jpg")
            print(gsReference.fullPath)//imageFolder/abc.jpg
            print(gsReference.bucket)//yourapp-206323.appspot.com
            print(gsReference.name)//abc.jpg
            gsReference.downloadURL(completion: { (url, error) in
                if let _url = url{
                    print(_url)
                    //use this _url in your any lazy loading third party library  and load image in your UITableViewCell
                    //in my case is user Kingfisher third party lasy loading
                      self.imgVUser.kf.setImage(with: _url)
                }
            })

UITableViewCell中的结果：-http://g.recordit.co/Ks22unDP8x.gif。



更多专业参考学习：-https://firebase.google.com/docs/storage/ios/download-files

快乐编码！！！：）

Swift iOS：Firebase数据库中的ImageUrl

2 个答案: