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POConfused why one piece of code works and another doesn't in Objective C
 

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  1. POConfused why one piece of code works and another doesn't in Objective C
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    <p>Sorry about the title being extremely vague, I'm new to Objective C and struggling a little with it. Basically I have the following section of code:</p> <pre><code>Graph *graph1 = [[Graph alloc] init]; [graph1 addNode:@"TEST"]; </code></pre> <p>which is working to a degree. But I want to change it because the above code happens on a button press, and therefore I assume I am creating a new "*graph1" every time I do this. I thought I could simply change it to this: </p> <pre><code>if(self = [super init]) { [self setGraph: [[Graph alloc] init]]; } return self; </code></pre> <p>Where the above is in the init method, and below is the modified function:</p> <pre><code>[graph addNode:@"TEST"]; </code></pre> <p>However when debugging I've found addNode method is never called when it's like this.</p> <p>Thanks Zac</p> <p>This is testViewController.h</p> <pre><code>#import &lt;UIKit/UIKit.h&gt; @class Graph; @class Node; @interface testViewController : UIViewController { Graph *graph; UILabel *label; } @property (nonatomic, retain) IBOutlet UILabel *label; @property (nonatomic, retain) Graph *graph; - (IBAction) buttonPressed:(id)sender; @end </code></pre> <p>This is textViewController.m</p> <pre><code>#import "testViewController.h" #import "Graph.h" @implementation testViewController @synthesize label, graph; - (id)init { if(self = [super init]) { [self setGraph: [[Graph alloc] init]]; } return self; } - (IBAction)buttonPressed:(id)sender { //Graph *graph1 = [[Graph alloc] init]; [graph addNode:@"TEST"]; Node *node1 = [[Node alloc] initWithLabel: @"LABEL"]; label.text = node1.label; } </code></pre>
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    1. USZachary Markham
    1. USZachary Markham
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    1. COJust to be clear I have 'graph' synthesized in this.
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      1. USZachary Markham
 

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