MonoTouch库的成本完全不是重点。你不应该在你的iPhone应用中使用Mono的原因是，它是一种拐杖。如果您懒得学习本机工具，那么我就没有理由相信您的产品值得下载。

编辑:4/14/2010用MonoTouch编写的应用程序不适合iTunes Store。这是应该的。苹果在Mac上看到了大量的浅端口，使用跨平台工具包，如Qt，或Adobe自己的System 7工具箱的部分重新实现，总之，它们不够好。

我已经使用MonoTouch几个月了，我从ObjectiveC移植了我的半成品应用，这样我就可以在未来的某个时候支持Android。

以下是我的经验:

不好的地方在于:

Xamarin Studio. Indie developers such as myself are forced into using Xamarin Studio. It is getting better every week, the developers are very active on the forums identifying and fixing bugs, but it's still very slow, frequently hangs, has a lot of bugs and debugging is pretty slow also. Build times. Building my large (linked) app to debug on a device can take a few minutes, this is compared to XCode which deploys almost immediately. Building for the simulator (non-linked) is a bit quicker. MonoTouch issues. I've experienced memory leak issues caused by the event handling, and have had to put in some pretty ugly workarounds to prevent the leaks, such as attaching and detaching events when entering and leaving views. The Xamarin developers are actively looking into issues like this. 3rd party libraries. I've spent quite a time converting/binding ObjectiveC libraries to use in my app, although this is getting better with automated software such as Objective Sharpie. Larger binaries. This doesn't really bother me but thought I'd mention it. IMO a couple of extra Mb is nothing these days.

好的方面:

多平台。我的朋友很高兴地用我的核心代码库为我的应用程序创建了一个Android版本，我们正在并行开发，并将其提交给Dropbox上的远程Git存储库，进展顺利。 . net。在c# . net中工作比在Objective C中工作要好得多。 MonoTouch。iOS中几乎所有的东西都映射到。net中，让事情正常工作是相当直接的。 Xamarin的。你可以看到这些人真的在努力改进一切，使开发更顺畅和更容易。

我强烈推荐Xamarin进行跨平台开发，特别是如果你有钱使用与Visual Studio合作的商业版或企业版。

如果你只是在创造一款在其他平台上永远都不需要的iPhone应用，并且你是一名独立开发者，那么我现在会坚持使用XCode和Objective C。

作为一个同时拥有c#和Objective-C经验的人，我想说对于大多数人来说Xamarin是物有所值的。

c#是一门设计得很好的语言，c# API也是设计得很好的。当然Cocoa Touch的API(包括UIKit)也有很好的设计，但是语言可以在几个方面得到改进。当你用c#写代码时，你可能会比用Objective-C写相同的代码更有效率。这是由于几个原因，但其中一些原因是:

C# has type inference. Type inference makes writing code quicker, since you don't have to "know" the type on the left-hand side of an assignment. It also makes refactoring easier and more saver. C# has generics, which will reduce errors compared to equivalent Objective-C code (though there are some work-arounds in Objective-C, in most situations developers will avoid them). Recently Xamarin added support for Async / Await, which makes writing asynchronous code very easy. You'll be able to reuse part of the code base on iOS, Android and Windows Phone. MonoTouch largely implements the CocoaTouch API's in a very straightforward way. E.g.: if you've got experience with CocoaTouch, you'll know where to find classes for controls in MonoTouch (MonoTouch.UIKit contains classes for UIButton, UIView, UINavigationController, etc..., likewise MonoTouch.Foundation got classes for NSString, NSData, etc...). Xamarin will give users a native experience, unlike solutions like PhoneGap or Titanium.

现在Objective-C比c#有一些优势，但在大多数情况下，用c#编写应用程序通常会减少开发时间和更清晰的代码，并减少将同一应用程序移植到其他平台的工作。一个值得注意的例外可能是依赖OpenGL的高性能游戏。

使用Mono并不是一种依赖。它为iPhone操作系统增加了很多功能。LINQ, WCF, Silverlight应用程序之间的可共享代码，ASP。NET页面，一个WPF应用程序，一个Windows Form应用程序，还有针对Android的mono它也适用于Windows Mobile。

So, you can spend a bunch of time writing Objective-C (You'll see from many studies where the exact same sample code in C# is significantly less to write than OC) and then DUPLICATE it all for other platforms. For me, I chose MonoTouch because the Cloud App I'm writing will have many interfaces, the iPhone being only one of them. Having WCF data streaming from the cloud to MonoTouch app is insanely simple. I have core libraries that are shared among the various platforms and then only need to write a simple presentation layer for the iPhone/WinMobile/Android/SilverLight/WPF/ASP.NET deployments. Recreating it all in Objective-C would be an enormous waste of time both for initial dev and maintenance as the product continues to move forward since all functionality would have to be replicated rather than reused.

那些侮辱MonoTouch或暗示它的用户需要拐杖的人，是缺乏拥有。net框架的大蓝图，可能不理解逻辑与表示的正确分离，这种分离可以在跨平台和设备上重用。

Objective-C is interesting and very different from many common languages. I like a challenge and learning different approaches... but not when doing so impedes my progress or creates unnecessary re-coding. There are some really great things about the iPhone SDK framework, but all that greatness is fully supported with MonoTouch and cuts out all the manual memory management, reduces the amount of code required to perform the same tasks, allows me to reuse my assemblies, and keeps my options open to be able to move to other devices and platforms.

如果这是你唯一要开发的iPhone应用程序，而你对开发Mac应用程序毫无兴趣，那么MonoTouch可能是值得的。

如果你想要开发更多的iPhone应用，或者想要做一些Mac原生开发，那么学习Objective-C和相关框架可能是值得的。另外，如果你是那种喜欢学习新东西的程序员，这是一个有趣的新范式。

MonoTouch库的成本完全不是重点。你不应该在你的iPhone应用中使用Mono的原因是，它是一种拐杖。如果您懒得学习本机工具，那么我就没有理由相信您的产品值得下载。

编辑:4/14/2010用MonoTouch编写的应用程序不适合iTunes Store。这是应该的。苹果在Mac上看到了大量的浅端口，使用跨平台工具包，如Qt，或Adobe自己的System 7工具箱的部分重新实现，总之，它们不够好。