如何通过Firebase从我的iOS应用程序上传和检索图像？

Question

我想从我的视图控制器中的一个上传图像到Firebase，然后我想将上传的图像加载到另一个视图控制器。此外，我希望这个过程继续为无限用户。我不知道如何做到这一点。

Answer 1

• 你必须上传到火力下面的图像

  // Data in memory 
  let data: NSData = ... 
  
  // Create a reference to the file you want to upload 
  let riversRef = storageRef.child("images/rivers.jpg") 
  
  // Upload the file to the path "images/rivers.jpg" 
  let uploadTask = riversRef.putData(data, metadata: nil) { metadata, error in 
  if (error != nil) { 
  // Uh-oh, an error occurred! 
  } else { 
  // Metadata contains file metadata such as size, content-type, and download URL. 
  let downloadURL = metadata!.downloadURL 
  } 
  } 
  

• 给出后，就可以检索图像如下

  // 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.dataWithMaxSize(1 * 1024 * 1024) { (data, error) -> Void   in 
  if (error != nil) { 
  // Uh-oh, an error occurred! 
  } else { 
  // Data for "images/island.jpg" is returned 
  // ... let islandImage: UIImage! = UIImage(data: data!) 
  } 
  } 
  

• ，你也可以找到完整的参考在https://firebase.google.com/docs/storage/ios/