如何修复DataSnapShot不起作用的初始化程序

Question

我的初始化器没有 工作。如果我只是从初始化程序中删除图像，则初始化程序会工作

met-a-pet-812ca
 publications:
   age: 
   breed: 
   city: 
   color: 
   currentUser: 
   description: 
   gender: 
   images
          0: 
          1: 
          2: 
          3: 
   name: 
   region: 
   type: 

---

 init?(snapshot: DataSnapshot){
    guard
        let value = snapshot.value as? [String: AnyObject],
       let imagesAll0 = value["images"]!["0"] as? String,
        let imagesAll1 = value["images"]!["1"] as? String,
        let imagesAll2 = value["images"]!["2"] as? String,
        let imagesAll3 = value["images"]!["3"] as? String,
        let type = value["type"] as? String,
        let name = value["name"] as? String,
        let gender = value["gender"] as? String,
        let breed = value["breed"] as? String,
        let color = value["color"] as? String,
        let region = value["region"] as? String,
        let city = value["city"] as? String,
        let age = value["age"] as? String,
        let description = value["description"] as? String,
        let currentUser = value["currentUser"] as? String
     else {return nil}
    self.type = type
    self.name = name
    self.gender = gender
    self.breed = breed
    self.color = color
    self.region = region
    self.city = city
    self.age = age
    self.description = description
    self.imagesAnimal = ([imagesAll0,imagesAll1,imagesAll2,imagesAll3] as! [String])
    self.currentUser = currentUser



}