Ios 从初始值设定项返回，不初始化所有存储的属性Xcode 8

我升级到Xcode 8，我的应用程序停止工作，除了这一个错误，我已经能够修复一切。我一直在网上查找，但尚未找到此错误的修复方法。任何帮助都将不胜感激。 代码如下：

struct Party {
    let itemRef:FIRDatabaseReference?
    //
    let userID:String!
    let name:String!
    let title:String!
    let body:String!        

    init (userID:String, name:String, title:String = "", body:String) {
        self.userID = userID
        self.name = name
        self.title = title
        self.body = body
        self.itemRef = nil
    }

    init (snapshot:FIRDataSnapshot) {
        userID = snapshot.key
        itemRef = snapshot.ref

        if let titl = snapshot.value as? [String:AnyObject] {
            for child in titl{
                let shotKey = snapshot.children.nextObject() as! FIRDataSnapshot
                if let title = child.value as? [String:AnyObject]{
                    let title = title["title"]
                    print(title)
                }
            }
        }else{
            title = "Failed To Display Title"
        }

        if let user = snapshot.value as? [String:AnyObject] {
            for child in user{
                let shotKey = snapshot.children.nextObject() as! FIRDataSnapshot
                if let name = child.value as? [String:AnyObject]{
                    let name = name["name"]
                    print(name)
                }
            }
        }else{
            name = "Failed To Display Name"
        }

        if let partyBody = snapshot.value as? [String:AnyObject]{
            for child in partyBody{
                let shotKey = snapshot.children.nextObject() as! FIRDataSnapshot
                if let body = child.value as? [String:AnyObject]{
                    let body = body["body"]
                    print (body)
                }
            }
        }else{
            body = "Failed To Display Time"
        }
    }

    func toAnyObject() -> Any {
        return ["title":title, "name":name, "body":body]
    }
}

在某些条件下，第二个

init（快照：）

函数不会设置

名称

、

标题

、正文属性

您将此代码用于

标题

：

if let titl = snapshot.value as? [String:AnyObject] {
    for child in titl{
        let shotKey = snapshot.children.nextObject() as! FIRDataSnapshot
        if let title = child.value as? [String:AnyObject]{
            let title = title["title"]
            print(title)
        }
    }
}else{
    title = "Failed To Display Title"
}

此代码仅设置

else

子句中的

title

属性。

if

部分中对

title

的四个引用是对名为

title

的局部变量的引用，而不是名为

title

的属性的引用。因此，编译器抱怨您从未设置

title

属性，因为可能存在未设置的代码路径

对于

名称

和

正文

，您有相同的问题