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copied!<p>You need to make <code>measureType</code> an instance variable, so that each object of this type that you create has its own copy:</p> <pre><code>@interface ObjectSelectionViewController : NSViewController { NSString * measureType; // Declare an NSString instance variable } - (id) initWithMeasureType: (int)value; @end </code></pre> <p>As it is, there is only one copy of the variable, and every time you instantiate a new object, its value changes. Since each instance is referring to the same copy, they all get the same value:</p> <pre><code>ObjectSelectionViewController *length = [[ObjectSelectionViewController alloc] initWithMeasureType:0]; NSLog(@"%@", [length measurementType]); // Prints "Length" ObjectSelectionViewController *mass = [[ObjectSelectionViewController alloc] initWithMeasureType:1]; NSLog(@"%@", [length measurementType]); // Prints "Mass" </code></pre> <p>You also need to change your <code>init...</code> method as mentioned by other answerers:</p> <pre><code>- (id) initWithMeasureType: (int)value { // Call superclass's initializer self = [super init]; if( !self ) return nil; switch (value) { case 0: // Length measureType = @"Length"; break; case 1: // Mass measureType = @"Mass"; break; case 2: // Volume measureType = @"Volume"; break; } return self; } </code></pre> <p>Since you are assigning a literal string to the instance variable, you do not need to worry about managing its memory; if you were doing anything more complicated, you would probably do well by declaring a <a href="http://developer.apple.com/library/mac/documentation/General/Conceptual/DevPedia-CocoaCore/DeclaredProperty.html#//apple_ref/doc/uid/TP40008195-CH13-SW1">property</a>. Another note: initializer methods should always return <code>id</code>, a generic object pointer, to allow subclasses to work properly.</p>

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