Xamarin.iOS中使用Realm创建对象报错问题求助

Hey there! I totally get how frustrating it is when following a tutorial step-by-step and hitting a random error—let's fix this Realm issue together.

错误原因 #

The error you're seeing happens because the tutorial you're using is from 2016, and Realm's .NET API has changed a lot since then. The generic CreateObject<T>() method that the tutorial uses no longer exists in newer versions of Realm for Xamarin; instead, only the non-generic CreateObject(string, object) overload is available, which is why you can't use type arguments with it.

解决方案 #

Luckily, creating objects in Realm is even simpler now! Here are two easy ways to replace that problematic code:

方法1：直接实例化对象并添加到Realm

You can directly create an instance of your Car class, then use realm.Add() to persist it within a write transaction. This is the recommended approach in modern Realm versions:

private void AddNewCar() 
{ 
    var realm = Realm.GetInstance(); 
    realm.Write(() => 
    { 
        var newCar = new Car();
        // 在这里设置车辆属性（可选）
        newCar.Brand = "Honda";
        newCar.Model = "Civic";
        realm.Add(newCar); 
    }); 
}

方法2：使用Realm的泛型Add重载（简化写法）

If you want to combine instantiation and addition in one line, you can use the generic overload of Add():

private void AddNewCar() 
{ 
    var realm = Realm.GetInstance(); 
    realm.Write(() => 
    { 
        var newCar = realm.Add(new Car());
        // 同样可以在这里设置属性
        newCar.Model = "Model 3";
    }); 
}

额外检查 #

Your Car class looks correct already, but just to confirm:

• It properly inherits from RealmObject
• It has a public parameterless constructor (required by Realm)
• Its properties are auto-implemented (getters and setters)

Going forward, I'd recommend referencing the latest Realm .NET documentation instead of older tutorials—this will help you avoid version-related API mismatches.

内容的提问来源于stack exchange，提问作者Jamie Leech