Swift 错误的可能原因是什么：类型“的值”；x"；没有下标吗？

这是我的密码。我已经检查过了，但似乎无法纠正错误。我需要做的是从数据库中获取firebase信息并将其显示在屏幕上

class homepage:UITableViewController, CLLocationManagerDelegate{
var people = [Userx]()

public override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    return people.count
}

public override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath)
    as! ViewControllerTableViewCell

    let people: Userx


    people = people[indexPath.row]
    cell.lblName.text = people.Education
    cell.lblgenre.text = people.WhatIamConsideringBuying

    return cell


}



@IBOutlet weak var table: UITableView!
var locationManager = CLLocationManager()

 override func viewDidLoad() {

navigationItem.leftBarButtonItem = UIBarButtonItem(title: "Sign Out", style: .plain, target: self, action: #selector(signOut))

super.viewDidLoad()

let databaseRef = Database.database().reference()
databaseRef.child("Education").observe(DataEventType.value,  with: {snapshot in

    if snapshot.childrenCount>0{
        self.people.removeAll()
        for people in snapshot.children.allObjects as! [DataSnapshot] {
            let peopleObject = people.value as? [String: AnyObject]
            let peopleEducation = peopleObject?["Education"]
            let peopleWhatIamConsideringBuying = peopleObject?["WhatIamConsideringBuying"]
            let peoplePhotoPosts = peopleObject?["PhotoPosts"]
            let people = Userx(Education: peopleEducation as! String?, WhatIamConsideringBuying: peopleWhatIamConsideringBuying as! String?, PhotoPosts: peoplePhotoPosts as AnyObject)
                self.people.append(people)

        }
        self.table.reloadData()

    }

})

//以下是另一个文件中的Userx：

class Userx {
var Education: String?
var WhatIamConsideringBuying: String?
var PhotoPosts: AnyObject?

init(Education: String?, WhatIamConsideringBuying: String?, PhotoPosts: AnyObject? ){

self.Education = Education
    self.WhatIamConsideringBuying = WhatIamConsideringBuying
    self.PhotoPosts = PhotoPosts
}

---

完成后，我希望获取并显示firebase数据。

问题是您使用另一种类型的局部变量来覆盖实例属性

people

，即

Userx

，而不是

cellForRowAt

中的

[Userx]

。应该为局部变量指定另一个名称

public override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath)
    as! ViewControllerTableViewCell

    let person: Userx = people[indexPath.row]

    cell.lblName.text = person.Education
    cell.lblgenre.text = person.WhatIamConsideringBuying

    return cell
}

与您的问题无关，但您还应该遵守Swift命名约定，该约定对于变量名来说是小写的，并尽可能使用不可变的非可选值。使用

struct

而不是

class

还可以提供一个自动合成的成员初始值设定项，因此您不需要自己创建一个。当您知道变量应包含的类型时（大多数情况下都是这样），也应尽量不要使用

Any

或

AnyObject

---

问题是您使用另一种类型的局部变量

Userx

而不是

cellForRowAt

中的

[Userx]

覆盖实例属性

people

。应该为局部变量指定另一个名称

public override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath)
    as! ViewControllerTableViewCell

    let person: Userx = people[indexPath.row]

    cell.lblName.text = person.Education
    cell.lblgenre.text = person.WhatIamConsideringBuying

    return cell
}

与您的问题无关，但您还应该遵守Swift命名约定，该约定对于变量名来说是小写的，并尽可能使用不可变的非可选值。使用

struct

而不是

class

还可以提供一个自动合成的成员初始值设定项，因此您不需要自己创建一个。当您知道变量应包含的类型时（大多数情况下都是这样），也应尽量不要使用

Any

或

AnyObject

---

您在init中丢失了此文件中的一个大括号

您的代码

class Userx {
var Education: String?
var WhatIamConsideringBuying: String?
var PhotoPosts: AnyObject?

init(Education: String?, WhatIamConsideringBuying: String?, PhotoPosts: AnyObject? ){

self.Education = Education
    self.WhatIamConsideringBuying = WhatIamConsideringBuying
    self.PhotoPosts = PhotoPosts
}

固定代码

   class Userx {
    var Education: String?
    var WhatIamConsideringBuying: String?
    var PhotoPosts: AnyObject?

    init(Education: String?, WhatIamConsideringBuying: String?, PhotoPosts: AnyObject? ){

    self.Education = Education
        self.WhatIamConsideringBuying = WhatIamConsideringBuying
        self.PhotoPosts = PhotoPosts
    }
}

---

您在init中丢失了此文件中的一个大括号

您的代码

class Userx {
var Education: String?
var WhatIamConsideringBuying: String?
var PhotoPosts: AnyObject?

init(Education: String?, WhatIamConsideringBuying: String?, PhotoPosts: AnyObject? ){

self.Education = Education
    self.WhatIamConsideringBuying = WhatIamConsideringBuying
    self.PhotoPosts = PhotoPosts
}

固定代码

   class Userx {
    var Education: String?
    var WhatIamConsideringBuying: String?
    var PhotoPosts: AnyObject?

    init(Education: String?, WhatIamConsideringBuying: String?, PhotoPosts: AnyObject? ){

    self.Education = Education
        self.WhatIamConsideringBuying = WhatIamConsideringBuying
        self.PhotoPosts = PhotoPosts
    }
}

---

这很可能是复制粘贴错误，即使不是，也绝对不是特定编译时错误的原因。这很可能是复制粘贴错误，即使不是，也绝对不是特定编译时错误的原因。谢谢你的回答。这是有道理的。我仍然收到一个错误AppDelegate不符合协议UITableViewDataSource。我以前从未遇到过应用程序委托错误。你知道可能是什么原因吗？@user9269956该错误似乎与你问题中的代码无关。你应该问一个关于另一个问题的新问题。谢谢，谢谢你的回答。这是有道理的。我仍然收到一个错误AppDelegate不符合协议UITableViewDataSource。我以前从未遇到过应用程序委托错误。你知道可能是什么原因吗？@user9269956该错误似乎与你问题中的代码无关。你应该问一个关于另一个问题的新问题。谢谢