在设置包中的设置更改时收到通知(在 Xamarin iOS 中) [英] Be notified of change in a setting in Settings Bundle (in Xamarin iOS)

问题描述

我希望我的应用在设置包中的一项设置发生更改时收到通知.或者，如果这不可能，则进行任何更改(然后我会检查是否是该特定设置).

I would like my app to be notified of a change in one of the settings in the settings bundle. Or if that's not possible, of any change (and I will then check if it was that specific setting).

我将如何在 Xamarin iOS 中实现这一目标?

How would I achieve that in Xamarin iOS?

似乎在这些答案one和两个.但我不知道如何在 Xamarin/C# 中做到这一点.

It seems like one of those options is addressed in these answers one and two. But I can't figure out how to do that in Xamarin/C#.

推荐答案

只需将 Objective-C 代码翻译成 C#，如果你阅读了 文档在这里，你会发现有一些例子:

Just translate the Objective-C code to C# and if you read the document here, you will find there are some examples:

//Lambda 风格

NSNotificationCenter.DefaultCenter.AddObserver(

    NSValueTransformer.UserDefaultsDidChangeNotification, (notification) => { Console.WriteLine("Received the notification NSValueTransformer", notification); }

);

//方法风格

void Callback(NSNotification notification)
{
    Console.WriteLine("Received a notification NSValueTransformer", notification);
}

void Setup()
{
    NSNotificationCenter.DefaultCenter.AddObserver(NSValueTransformer.UserDefaultsDidChangeNotification, Callback);
}

参考:userdefaultsdidchangenotification

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