领域列表过滤器 Swift

var numbersDetail = List is type of ContactDetail()
let predicate = NSPredicate(format: ContactDetail.NUMBER + " = %@", formattedNumber!)
let realmContactDetail = numbersDetail.filter(predicate).first

获取错误：

throw RLMException(“此方法只能在 RLMArray 上调用 从 RLMRealm 检索实例");

如果您尝试在 Realm Swift 上执行查询，则会出现此错误List对象（实际上是 Objective-CRLMArray在其父对象被添加到 a 之前Realm.

class Person: Object {
  dynamic var name = ""
  dynamic var picture: NSData? = nil // optionals supported
  let dogs = List<Dog>()
}

let dog = Dog()
dog.name = "Rex"

let person = Person()
person.dogs.append(dog)

let rex = person.dogs.filter("name == 'Rex'") // QUERY WILL TRIGGER EXCEPTION AT THIS POINT

let realm = try! Realm()
try! realm.write {
    realm.add(person)
}

let rex = person.dogs.filter("name == 'Rex'") // Query will now work as expected

简而言之，您需要确保numbersDetail属于一个Realm在执行该查询之前。您可以通过检查轻松测试这一点numbersDetail.realm != nil.