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POAccessing Plist Arrays / Nodes - Objective C
 

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  1. POAccessing Plist Arrays / Nodes - Objective C
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    <p>I have a Property List file that I'm using to store questions and answer data. Within this file I have a collection of arrays, within these I store the different categories and questions. However I can't seem to access this data?</p> <p>The property file;</p> <pre><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt; &lt;!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd"&gt; &lt;plist version="1.0"&gt; &lt;dict&gt; &lt;key&gt;Category1&lt;/key&gt; &lt;array&gt; &lt;array&gt; &lt;string&gt;Question1&lt;/string&gt; &lt;string&gt;Answer1&lt;/string&gt; &lt;/array&gt; &lt;array&gt; &lt;string&gt;Question2&lt;/string&gt; &lt;string&gt;Answer2&lt;/string&gt; &lt;/array&gt; &lt;array&gt; &lt;string&gt;Question3&lt;/string&gt; &lt;string&gt;Answer3&lt;/string&gt; &lt;/array&gt; &lt;array&gt; &lt;string&gt;Question4&lt;/string&gt; &lt;string&gt;Answer4&lt;/string&gt; &lt;/array&gt; &lt;/array&gt; &lt;/dict&gt; &lt;/plist&gt; </code></pre> <p>Below I'm using to access the property list file by stepping through it using two simple buttons;</p> <pre><code>-(IBAction)nextleft { [self bingsound]; if (questionCounter &gt; 1) { questionCounter -= 1; } [self nextQuestion]; } -(IBAction)nextright { [self bingsound]; if (questionCounter &lt; 20) { questionCounter += 1; } [self nextQuestion]; } -(void)nextQuestion { NSArray *pair; pair = [categories objectAtIndex:questionCounter]; plistQuestion = [pair objectAtIndex:0]; plistAnswer = [pair objectAtIndex:1]; abbreviation.text = plistQuestion; } </code></pre> <p>I'm populating the the category array as follows;</p> <pre><code>categories = [NSArray arrayWithContentsOfFile:@"questions.plist"]; </code></pre>
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    1. COCan you open your property list in a text editor, and post the opening lines? That screenshot doesn't look right, the first entry should be called "Root", which is not normally editable through the plist editor. You've either got an invalid property list or a dictionary as the root object - in the debugger, check what your categories array is initialised to.
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    2. COJust added that now for you to take a look at.
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