barcode generator dll in vb.net 13: Support Tools for the Busy Developer in Objective-C

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CHAPTER 13: Support Tools for the Busy Developer
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Figure 13 15. Web page layout for DailyJournal help
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Obviously you need to add some help content text, images, and so on to these web pages. Good writing for web pages is a discipline in and of itself, and a detailed description is way beyond the scope of this book. However, there are a few points to bear in mind when writing help web pages: Keep the pages short unless a long description is really necessary. Put the salient points near the top of the page many people never venture below the fold on a web page. Use diagrams only where they add to the message, and keep them small. Make the page title as meaningful as possible this is the text that will show up in a help search later on. You can use the meta-description tag to provide a more verbose description that will show up as a tooltip and as the second line in any search results (see Listing 13 1 and Figure 13 20).
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Adding Meta Tags to the Welcome Page
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The next thing you need to do is add some meta tags to the <head> element of the welcome page: these help to identify that page to the Help Indexer and Xcode as the entry point for help. See Listing 13 1 much of the <head> element has been omitted for clarity, indicated by [...].
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CHAPTER 13: Support Tools for the Busy Developer
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Listing 13 1. Meta Tags in Index.html <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> [...] <meta name="AppleTitle" content="DailyJournal Help" /> <meta name="AppleIcon" content="DailyJournal/DailyJournalIcon16.png" /> <meta name="description" content="Online help for the Consultant's Daily Journal application" /> [...] </head> [...]
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The AppTitle meta tag is used, as you will see shortly, to identify the entry point into our help pages. The 16-pixel PNG image will be used in the Help menu of course, there has to be an image file at this location. The description tag provides text that will appear as a tooltip when doing help searches. For this reason you should add meta name="description" tags to each of the HTML files in the collection of help web pages.
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Running the Help Indexer
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Once you have created and configured the welcome page and other pages, it s time to run the Help Indexer. To do this, start up the program in /Developer/Applications/Utilities/. The interface is very simple, asking for a help folder location. The folder in this case is the folder that contains the index.html and other files (see Figure 13 16):
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Figure 13 16. Web page files complete with help index for use in the DailyJournal application
The Help Indexer acts in much the same way as a search spider on a conventional web page: it reads the textual content of each web help page and follows any links that it
CHAPTER 13: Support Tools for the Busy Developer
finds to other pages. It uses the meta AppleTitle tag to identify the home page out of the collection of web help pages. All of this information is then packaged up into the index that is used by the help search function and stored in this folder with the name DailyJournal.helpindex. The application s Search Help function is able to read this index and point to the relevant location in the help page collection.
Adding and Configuring the Help Files Within the Xcode Project
The next step is to add this complete folder to the DailyJournal project. Open the project in Xcode, select the Resources item in the Groups & Files list, right-click, and choose Add Existing Files. Choose the DailyJournal folder that contains the help files (in the preceding example this folder is /Volumes/scratchpad/Development/Help Development/DailyJournal). In the drop-down window that appears check the Copy items checkbox and also the radio button labeled Create Folder References for any added folders (see Figure 13 17), then finally click Add.
Figure 13 17. Adding the help files to the DailyJournal project
This should give you a project window like the one in Figure 13 18. The final step is to edit the DailyJournal-Info.plist file so that it links to the help folder and the welcome file. Choose the .plist file in the Detail pane so that you have the content in the code editor window. Next, right-click on the Information Property List title and choose Add Row from the contextual menu. This adds a blank row to the .plist file and pops up a menu of available .plist keys. Choose Help Book directory name and add the value DailyJournal (as that was the name of the folder containing help content). Add another row with the key Help Book Identifier, and set the value of this to DailyJournal Help. Note that this is the same as the value that you put into the meta tag for AppleTitle in the help welcome page (look back to Listing 13 1).
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