Archiving with XML Property Lists
If your objects are of type NSString, NSDictionary, NSArray, NSDate, NSData, or NSNumber, you can use the writeToFile:atomically: method implemented in these classes to write your data to a file.
In the case of writing out a dictionary or an array, this method writes the data to the file in the format of an XML property list.
Tutorial
Goal: This tutorial will teach you how to read/write an XML property list with Objective-C.
Saving a Dictionary as an XML Property List
1. Open a Terminal Window and create a new file called archive.m. (i.e. emacs archive.m)
2. Copy and paste the code below. Type CONTROL + X then S to save the file, then type CONTROL + X then C to exit.
3. Compile the code and then run.
(i.e. gcc -framework Foundation archive.m -o arch)
(i.e. ./arch)
4. Type ls then enter and you should see a new file called buildings was created.
5. Open the file and it should match the file below.
Reading a Dictionary from an XML Property List
1. Open a Terminal Window and create a new file called unArchive.m. (i.e. emacs unArchive.m)
2. Copy and paste the code below. Type CONTROL + X then S to save the file, then type CONTROL + X then C to exit.
3. Compile the code and then run.
(i.e. gcc -framework Foundation unArchive.m -o unArch)
(i.e. ./unArch)
4. After you run the program you should have output that matches below.
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