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    <p>I'm going to assume the question involves a class, <code>ClassOne</code>, with an instance variable <code>int integerOne</code>, which you'd like to access from another class, <code>ClassTwo</code>. The best way to handle this is to create a property in <code>ClassOne</code>. In ClassOne.h:</p> <pre><code>@property (assign) int integerOne; </code></pre> <p>This declares a property (basically, two methods, <code>- (int)integerOne</code>, and <code>- (void)setIntegerOne:(int)newInteger</code>). Then, in ClassOne.m:</p> <pre><code>@synthesize integerOne; </code></pre> <p>This "synthesizes" the two methods for you. This is basically equivalent to:</p> <pre><code>- (int)integerOne { return integerOne; } - (void)setIntegerOne:(int)newInteger { integerOne = newInteger; } </code></pre> <p>At this point, you can now call these methods from <code>ClassTwo</code>. In ClassTwo.m:</p> <pre><code>#import "ClassOne.h" //Importing ClassOne.h will tell the compiler about the methods you declared, preventing warnings at compilation - (void)someMethodRequiringTheInteger { //First, we'll create an example ClassOne instance ClassOne* exampleObject = [[ClassOne alloc] init]; //Now, using our newly written property, we can access integerOne. NSLog(@"Here's integerOne: %i",[exampleObject integerOne]); //We can even change it. [exampleObject setIntegerOne:5]; NSLog(@"Here's our changed value: %i",[exampleObject integerOne]); } </code></pre> <p>It sounds like you should walk through a few tutorials to learn these Objective-C concepts. I suggest <a href="https://stackoverflow.com/questions/1362476/whats-the-best-resource-to-learn-how-to-write-apps-for-mac-os-x/1362595#1362595">these</a>.</p>
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