我写的代码正确地将单个帖子写到我的Firebase数据库中。问题是,当我添加另一个帖子时,它会覆盖之前的帖子。如何在不覆盖的情况下将帖子添加到现有数组?
func postToFirebase(imgUrl: String) {
let post: Dictionary<String, AnyObject> = [
"caption": postDescription.text! as AnyObject,
"imageUrl": imgUrl as AnyObject,
"likes": 0 as AnyObject
]
let firebasePost = DataService.ds.REF_POSTS.childByAutoId()
firebasePost.setValue(post)
let userPost = firebasePost.key
print("Firebase Post: \(String(describing: firebasePost))")
_ = Auth.auth().addStateDidChangeListener { (auth,user) in
if let user = user {
let userId = user.uid
print("USER: \(String(describing: userId))")
let newPost = DataService.ds.REF_USERS.child("\(userId)").child("posts")
//print("NEW POST: \(newPost.child)")
newPost.setValue([userPost : true])
}
}
postDescription.text = ""
imageSelected = false
newPostImage.image = UIImage(named: "icons8-camera-100")
}
答案 0 :(得分:1)
我可以通过稍微更改设置值的方式来解决此问题。现在看起来像这样:
let newPost = DataService.ds.REF_USERS.child("\(userId)").child("posts").child(userPost!)
newPost.setValue(true)