Objective-C對C#之有效轉換

Abstract

隨著手持裝置的流行與發展，數個作業系統成為手持裝置作業系統的主流，對跨平台的支援成為目前佈局於手持裝置的關鍵。在有選擇的情況下，程式開發者不會想要維護兩份程式碼，在本篇論文中的Objective-C對C#轉譯器提供給程式開發者這種選擇: 降低成本，提升系統的維護性，更快速的釋出產品，開發人力的精簡能夠更快速的應變與更精緻的開發小組。本篇論文是第一篇探討iOS系統上開發所用到的語言- Objective-C與一被多種平台所支援之高階語言- C#語法上之差異，並實作一個能將Objective-C程式轉換成C#程式的工具，幫助程式開發者在跨平台開發的時間成本。 Xamarin不僅限於Windows Mobile並在多種平台上支援C#，但程式開發者仍須維護Objective-C的程式碼，此外多數的程式開發者已熟悉Objective-C，新的語言和在不熟悉的環境上開發學習成本較高，我們的轉譯器減輕了這樣的問題。

As the mobile devices are becoming prevalent, two or three operating systems on mobile devices are most dominant. The issue of cross-platform support is critical for comprehensive deployment on mobile devices. No developers want to maintain two codebases if they have a choice. This thesis presents our Objective-C to C# translator that offers developers such a choice: Unifying the codebases or eliminating the need of redundant codebases means cost-reduction, system maintainability, faster product release cycle, and a smaller development team with high agility and affordable expertise requirement, This thesis first investigates the syntactic differences between the Objective-C, one of the programming languages on the iOS system, and another high level language, C#, which is supported on more platforms. Next we present the design and implementation of the translator from Objective-C to C#. The translator helps the developers deploy solutions to a comprehensive set of mobile devices faster and cheaper. Note that Xamarin now supports C# on multiple platforms beyond just Windows Mobile, but developers still need to deal with existing Objective-C codebases. Furthermore, Objective-C may be more familiar with most mobile developers. Learning curve of a new language and an unfamiliar environment is uncertain and expensive. Our translator alleviates this learning curve issue as well.