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Nhảy đến một tập tin đã được chỉnh sửa trong cửa sổ này Nhảy đến một định nghĩa, chức năng, hoặc đánh dấu trong file Nhảy đến một địa chỉ thiết lập trong file Nhảy đến một điểm dừng thiết lập trong file Nhảy đến lớp học liên quan đến định nghĩa Nhảy vào một tập tin bao gồm, hoặc một tập tin mà bao gồm Nhảy file này để các đối tác của Khóa tập tin hoặc mở tập tin | Display Options 99 The following table lists the functions of the navigation bar controls. CONTROL FUNCTION File History Jumps to a file that has been edited in this pane Functions Jumps to a function definition or marker in the file Bookmarks Jumps to a bookmark set in the file Breakpoints Jumps to a breakpoint set in the file Class Hierarchy Jumps to related class definitions Included Files Jumps to an included file or a file that includes this file Counterpart Jumps to the counterpart of this file Lock Locks or unlocks the file The Lock button toggles the lock read-only attribute of the file. If you lock a file or the file was locked when it was opened the editor will be in display-only mode. If you attempt to change the document Xcode warns you that you cannot edit the file. You can override this mode in the dialog box and make changes to the document but that does not change the permissions of the file and you will not be able to save changes until the file is made writable. Unlocking a file automatically switches the editor to its normal editing mode. See the option Save Files As Writable in the Display Options section of this chapter. Numerous Xcode features rely on knowledge about your program s symbols and source files obtained from the Code Sense index. This includes features like jumping to a symbol definition the Class Hierarchy menu Included Files menus and auto-completion just to name a few. By default Code Sense is enabled for all projects so this shouldn t present an obstacle but if any of these features aren t working see the Code Sense section in Chapter 7. You may need to turn on Code Sense or reindex your project. All of the other navigation controls are explained in the Navigating Within a File section later in this chapter. DISPLAY OPTIONS The appearance of an editor pane can be customized in a number of different ways and a variety of options determine how the text itself is interpreted and displayed. The following table lists the principal .
