ios - 如何使用 Swift 4 的 MagicalRecord 正确获取数据？

Question

我正在尝试从我的 User 类中获取数据:

@objc(User)
class User: NSManagedObject {

// Attributes
   @NSManaged var cAge: Int16
   @NSManaged var rAge: Int16
   @NSManaged var cIncome: Int64
   @NSManaged var rIncome: Int64
   @NSManaged var state: String
   @NSManaged var returnRate: Float

}

这是我的提取调用:

let user = User.mr_findAll()! as! [User]
print(user)

这是 print(user) 的输出:

[<User: 0x2812da300> (entity: User; id: 0x2831da740 <x-coredata:///User/t34A918DC-3B79-4ECC-91EF-16F658B20B8A2> ; 
data: {
    cAge = 23;
    cIncome = 125086;
    rAge = 50;
    rIncome = 365048;
    returnRate = "0.78";
    state = In;
})]

我怎样才能只检索数据，而不检索所有其他信息？

Answer 1

我需要遍历结果以从 User 类中提取属性。

let users = User.mr_findAll()! as! [User]
for user in users{
     print(user.cAge)
}