根据firebase数据库返回的字符串值显示某个图像

Question

我想根据帐户类型在用户单元格中显示某个图像，因此firebase包含一个帐户类型：person的帐户我想显示一个人帐户图像，如果它包含帐户类型：我想要的商业帐户显示企业帐户图片。

我试过这个，但它不起作用

类UserCell：UITableViewCell {

 func setAccountTypeImage(){ 
    let AccountimageView = UIImageView()

    let userID = FIRAuth.auth()?.currentUser?.uid
    let ref = FIRDatabase.database().reference()

    ref.child("Users").child(userID!).observeSingleEvent(of: .value, with: { (snapshot) in


        if snapshot.hasChild("Person's Account User"){

            AccountimageView.image = UIImage(named: "icon-72x72")
        }else{

            if snapshot.hasChild("Business Account User"){

                AccountimageView.image = UIImage(named: "B icon-72x72")

            }
        }
    })
}


override func layoutSubviews() {

super.layoutSubviews（）

让AccountTypeImage：UIImageView = {         让AccountimageView = UIImageView（）

    AccountimageView.image = UIImage(named: "Grape")

    AccountimageView.translatesAutoresizingMaskIntoConstraints = false

    // the code below makes image a circle
    //the value of 24 comes from half the width/hieght anchor constant of 48
    AccountimageView.layer.cornerRadius = 20
    AccountimageView.layer.masksToBounds = true
    AccountimageView.contentMode = .scaleAspectFill




    return AccountimageView

}()


override init(style: UITableViewCellStyle, reuseIdentifier: String?) {
    super.init(style: .subtitle, reuseIdentifier: reuseIdentifier)

addSubview（AccountTypeImage）

    AccountTypeImage.leftAnchor.constraint(equalTo: self.leftAnchor, constant: 4).isActive = true
    AccountTypeImage.centerYAnchor.constraint(equalTo: self.centerYAnchor).isActive = true
    AccountTypeImage.widthAnchor.constraint(equalToConstant: 40).isActive = true
    AccountTypeImage.heightAnchor.constraint(equalToConstant: 40).isActive = true

}