TAILIEUCHUNG - Lập trình Wrox Professional Xcode 3 cho Mac OS part 17

Trong chương 6, bạn đã học được rất nhiều tính năng chỉnh sửa thiết kế đặc biệt để làm cho văn bản mã nguồn dễ dàng hơn, nhưng hầu hết các tính năng này chỉ là trợ lý văn bản mà ít hoặc không biết gì về mã và ký hiệu của bạn. Xcode cú pháp của các tính năng nhận biết nhận nơi các phụ tá chỉnh sửa văn bản cơ bản để lại off - với một số chồng lên nhau giữa chúng. | Syntax-Aware Editing WHAT S IN THIS CHAPTER Using and customizing syntax coloring Folding code blocks Accepting code completion suggestions Inserting text macros In Chapter 6 you learned a lot of editing features specifically designed to make writing source code easier but most of these features are just textual aides that know little or nothing about your code and symbols. Xcode s syntax-aware features pick up where the basic text editing aides leave off with some overlap between them. Syntax-aware editing means that the editor analyzes your source code and uses that knowledge to highlight your code s structure and symbols offer suggestions and make intelligent changes. You ve already encountered a few syntax-aware features. The Balance command which finds a matching brace or bracket understands the block structure string format comment syntax and other details of your programming language. This chapter describes the various syntax-aware editing features and tools available in Xcode. Xcode can know a lot about your code s structure and its vocabulary is quite broad it understands languages from ADA to XML. The code analysis is performed continuously and in the background. It won t get in the way of your development and it s almost always up-to-date. Download at 128 I CHAPTER 7 SYNTAX-AWARE EDITING CODE SENSE Code Sense is the technology that analyzes your code continuously while you write it. It assembles and maintains a database called the Code Sense index of the classes variables methods functions structures types data models and constants defined in your application. It also tracks class inheritance and file references. Many of the syntax-aware features described in this chapter rely on Code Sense. Code sense updates its index incrementally analyzing only the function or method that you re editing and the source files that have been saved recently. Updates are typically quite fast on the order of a few seconds. This means that Code Sense .

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