Swift 4 上传图片到 Firebase

Question

大家下午好，我正在尝试将图像上传到 firebase 并在单元格上显示。除了图像之外，我几乎所有内容都在工作（我无法消除错误）。

Here is the error I am getting

Cannot invoke initializer for type 'Posts' with an argument list of type '(postImageStringUrl: String, content: String!, postId: String)'

    //[Save Image]
    // Create data in the server
    let data = UIImageJPEGRepresentation(self.addedImage.image!, 0.5)
    let metadata = StorageMetadata()
    metadata.contentType = "image/jpeg"

    let postId = "\(Auth.auth().currentUser!.uid)\(NSUUID().uuidString)"
   // Create a reference to the file you want to upload
    let imagePath = "postImages\(postId)/postPic.jpg"

    storageRef.child(imagePath).putData(data!, metadata: metadata) { (metadata, error) in
        if error == nil {
            let postRef = self.databaseRef.child("posts").childByAutoId()
            let post = Posts(postImageStringUrl: String (describing: metadata!.downloadURL()), content: descriptionTextView.text, postId: postId)
            postRef.setValue(post.toAnyObject())
        }else{
            print(error.debugDescription)
        }
    }
    //[Save Image]

这是我的 postViewController

导入基金会
导入 Firebase
导入 Firebase 数据库
导入 FirebaseStorage

结构帖子{

var postImageStringUrl: String!
var department: String!
var content: String!
var username: String!
var postId: String!
var ref: DatabaseReference?
var key: String!


init(postImageStringUrl: String, department: String, content: String, username: String,postId: String, key: String = ""){

    self.postImageStringUrl = postImageStringUrl
    self.department = department
    self.content = content
    self.username = username
    self.postId = postId
    self.key = key
    self.ref = Database.database().reference()


}

init(snapshot: DataSnapshot){

    let snapshotValue = snapshot.value as! NSMutableDictionary

    self.postImageStringUrl = snapshotValue["postImageStringUrl"] as! String
    self.department = snapshotValue["department"] as! String
    self.content = snapshotValue["content"] as! String
    self.username = snapshotValue["username"] as! String
    self.postId = snapshotValue["postId"] as! String
    self.key = snapshot.key
    self.ref = snapshot.ref


}

func toAnyObject() -> [String: AnyObject] {

    return ["postImageStringUrl": postImageStringUrl as AnyObject, "department": department as AnyObject,"content": content as AnyObject,"username": username as AnyObject, "postId": postId as AnyObject]
}

}

任何帮助将不胜感激...Ty

Answer 1

您的帖子初始为

init(
   postImageStringUrl: String,
   department: String, 
   content: String, 
   username: String,
   postId: String, 
   key: String = "")

您似乎正在尝试使用

对其进行初始化

let post = Posts(
          postImageStringUrl: String (describing: metadata!.downloadURL()), 
          content: descriptionTextView.text, 
          postId: postId)

基本上只是在初始化中缺少几个参数；部门、用户名

Swift 4 上传图片到 Firebase

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