检测您何时进入/退出Xamarin.iOS中的主线程 [英] Detecting when you're in/out of the main thread in Xamarin.iOS

问题描述

Xamarin / MonoTouch中是否有办法检测是否在主线程中调用了代码？

Is there a way in Xamarin/MonoTouch to detect whether code is being called in the main thread?

我正在寻找类似于Java的 EventQueue.isEventDispatchThread（） - 我在Swing编程中发现它很方便断言不时（或有时候断言它不是这样） - 确保模型一直在更新并从EDT读取，并且长时间运行的调用不会阻止UI。

I'm looking for something like the equivalent of Java's EventQueue.isEventDispatchThread() -- I've found in Swing programming it's handy to assert that from time to time (or sometimes to assert that it's not) -- making sure that models are consistently updated and read from the EDT, and that long-running calls don't block the UI.

我想在我的MonoTouch应用程序中执行相同操作，以确保不会从UI调用各种代码，或者包含在<$ c $中c> InvokeOnMainThread 。

I'd like to do the same in my MonoTouch app, to ensure that various bits of code are/aren't called from the UI, or wrapped in InvokeOnMainThread.

更新：对于任何人来之后： Obj-C 从以下JP回答。 Xamarin / MonoTouch相当于 NSThread.Current.IsMainThread 。

Updated: For anyone coming along later: Obj-C answer from JP below . The Xamarin/MonoTouch equivalent is NSThread.Current.IsMainThread.

推荐答案

我对Monotouch了解不多，但在iOS + [NSThread isMainThread] 可能就是你想要的。

I don't know much about Monotouch, but in iOS +[NSThread isMainThread] might be what you're looking for.

有时在编写多线程代码时，我会输入一个这样的断言：

Occasionally when writing multithreaded code, I will put in an assert like this:

NSAssert([NSThread isMainThread], @"Method called using a thread other than main!");

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