Question

我正在Xamarin学习Realm。

我正在尝试使用ObjectMapper objectMapper = new ObjectMapper(); byte[] bytesToWrite = objectMapper.writeValueAsBytes(yourObject) ObjectMetadata omd = new ObjectMetadata(); omd.setContentLength(bytesToWrite.length); transferManager.upload(bucketName, filename, new ByteArrayInputStream(bytesToWrite), omd);插入一些示例数据。我没有遇到任何问题，直到我在多个线程中调用相同的函数。领域文档说要在Thread内执行插入操作，但我在Realm-Xamarin中看不到任何类似的方法。

这是代码。

executeTransactionAsync

主题类：

Thread thread1 = new Thread(() => TestThread.CountTo10("Thread 1"));
thread1.Start();

Thread thread2 = new Thread(() => TestThread.CountTo10("Thread 2"));
thread2.Start();

领域对象：

public class TestThread
{
    public static Realm realm;
    public static void CountTo10(string _threadName)
    {
        realm = Realm.GetInstance();
        for (int i = 0; i < 5; i++)
        {
            realm.Write(() =>
            {
                RandomNumber random = new RandomNumber();
                System.Console.WriteLine("Iteration: " + i.ToString() + " Random No: " + random.number.ToString() + " from " + _threadName);
                realm.Manage(random);
            });

            Thread.Sleep(500);
        }
    }
}

Answer 1

问题是您的realm变量是static，这最终会导致非法线程访问。只需删除static，就可以了：

public class TestThread
{
    public void CountTo10(string _threadName)
    {
        Realm realm = Realm.GetInstance();
        for (int i = 0; i < 5; i++)
        {
            realm.Write(() =>
            {
                RandomNumber random = new RandomNumber();
                System.Console.WriteLine("Iteration: " + i.ToString() + " Random No: " + random.number.ToString() + " from " + _threadName);
                realm.Manage(random);
            });

            Thread.Sleep(500);
        }
        // no need to call `Realm.close()` in Realm-Xamarin, that closes ALL instances.
        // Realm instance auto-closes after this line
    }
}

Realm-Xamarin中的异步操作

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