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POUnable to access @property on another class
 

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    <p>A really noob question here. I have 2 VCs. One is called <code>SGPlayer</code> and another is <code>SGDownloader</code>. Basically I want to change the property of <code>SGDownloader</code> from the first class. I import the <code>SGDownloader</code> class like this:</p> <pre><code>// SGPlayer.h #import &lt;UIKit/UIKit.h&gt; #import "SGDownloader.h" @interface SGPlayer : UIViewController @property (nonatomic, retain) SGDownloader *downloaderClass; </code></pre> <p><code>SGPlayer.m</code> is like this:</p> <pre><code>// SGPlayer.m #import "SGPlayer.h" @interface SGPlayer () @end @implementation SGPlayer @synthesize downloaderClass; </code></pre> <p>I then set the downloadUrl property form the <code>SGDownloader</code> class in an action triggered by <code>UIButton</code> like that:</p> <pre><code>- (IBAction)loadURLButton:(id)sender { [self performSegueWithIdentifier:@"loadMyData" sender:nil]; downloaderClass.downloadURL = [NSURL URLWithString:@"http://www.google.com"]; } </code></pre> <p><code>NSLog</code> gives me (null) on my URL. If I use <code>prepareForSegue</code> method all is fine:</p> <pre><code>- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender { if ([[segue identifier] isEqualToString:@"loadMyData"]) { SGDownloader *vc = [segue destinationViewController]; vc.downloadURL = [NSURL URLWithString:@"http://www.google.com"]; } } </code></pre> <p>The thing is <em>I don't want</em> to use <code>prepareForSegue</code> here.</p> <p>I assume I might be misunderstanding the whole concept of how do you transfer the data between classes in Obj-C.</p> <p><strong>Edit:</strong></p> <p>I do have a <em>synthesised</em> property in the <code>SGDownloader</code> class:</p> <pre><code>@interface SGDownloader : UIViewController @property (nonatomic, retain) NSURL *downloadURL; @end </code></pre>
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    1. USSergey Grischyov
    1. USSergey Grischyov
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    1. COAnd you don't want to use prepareForSegue because ... ? Anyway, you need some way to get a reference to that other controller. How are they related?
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      1. USThilo
    2. CO@Thilo because I want an abstract implementation of this method. The segue just might not be there next time so it's not an option for me. I don't think those controllers are at all related, these are just 2 custom classes.
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      1. USSergey Grischyov
    3. COI think you should attach your segue to a button (delete loadUrlButton method) and then use `prepareForSegue:` this is noraml. Do not invent bicycle!
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