我正在尝试将 Firebase 值分配给我的结构:var productsArray = [Product]()
但是我有一个小错误:
无法将“NSTaggedPointerString”类型的值转换为
'NS字典'。
我知道我不能直接分配它们,所以这就是我这样进行转换的原因:
self.snusProductTitle = (snapshot.value! as! NSDictionary)["Products"] as! String
并转换:
func toAnyObject() -> [String: Any] {
return ["Products": snusProductTitle as Any]
}
像这样我附加:
let ref = FIRDatabase.database().reference().child("Snuses").queryOrdered(byChild: "Brand").queryEqual(toValue: brandName)
ref.observeSingleEvent(of: .childAdded, with: { (posts) in
self.productsArray.removeAll()
var newPostsArray = [Product]()
for post in posts.children {
print(posts.value)//Look below image
let newPost = Product(snapshot: post as! FIRDataSnapshot)
newPostsArray.insert(newPost, at: 0)
}
self.productsArray = newPostsArray
self.tableView.reloadData()
}) { (error) in
print(error.localizedDescription)
}
这是最小的产品结构:
class Product: NSObject {
var snusProductTitle: String!
var ref: FIRDatabaseReference?
init(snusProductTitle: String) {
self.snusProductTitle = snusProductTitle
self.ref = FIRDatabase.database().reference()
}
init(snapshot: FIRDataSnapshot){
self.snusProductTitle = (snapshot.value! as! NSDictionary)["Products"] as! String
}
func toAnyObject() -> [String: Any] {
return ["Products": snusProductTitle as Any]
}
}
![enter image description here](https://i.stack.imgur.com/tgFAl.png)
在谷歌搜索时,我找不到任何解决方案。
.childAdded
gives FIRDataSnapshot
一次......所以不需要为此循环......你只需要传递结构中的当前子元素。
self.productsArray.removeAll()
var newPostsArray = [Product]()
let ref = FIRDatabase.database().reference().child("Snuses").queryOrdered(byChild: "Brand").queryEqual(toValue: brandName)
ref.observe(FIRDataEventType.childAdded, with: { (posts) in
let newPost = Product(snapshot: posts as! FIRDataSnapshot)
newPostsArray.insert(newPost, at: 0)
self.productsArray = newPostsArray
self.tableView.reloadData()
}) { (error) in
print(error.localizedDescription)
}
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