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POSingleton function not retaining value
 

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    <p>I'll preface this question by saying that I am a total noob when it comes to Objective-C. So please, be patient with my question. :)</p> <p>So here is my issue. I am basically allowing the user to 'rub out' an image by using alpha blending and such, and then converting the created texture to a CCSprite. I am then able to store the CCSprite in a function within my singleton class. Like so:</p> <pre><code>erasedTextureSprite = [CCSprite spriteWithTexture:darknessLayer.sprite.texture]; [[MySingleton sharedMySingleton] setRevealTexture:erasedTextureSprite]; </code></pre> <p>Here is the <code>setRevealTexture</code> &amp; <code>getRevealTexture</code> function as well as the revealTexture variable initialisation in my <code>MySingleton.h</code> file:</p> <pre><code>@interface MySingleton : NSObject { CCSprite *revealTexture; } ... -(void) setRevealTexture: (CCSprite *) texture; -(CCSprite *) getRevealTexture; </code></pre> <p>And here are both functions in my <code>MySingleton.m</code> file:</p> <pre><code>-(void) setRevealTexture: (CCSprite *) texture { NSLog(@"set reveal texture."); revealTexture = texture; NSLog(@"%f", [revealTexture boundingBox].size.width); } -(CCSprite *) getRevealTexture { NSLog(@"got reveal texture."); NSLog(@"%f", revealTexture.contentSize.width); return revealTexture; } </code></pre> <p>If I set the reveal texture, and then get it right away, it seems to return the sprite correctly. However, if I set the texture and then transition to another scene, it seems to lose it's value, and throws me an error when I try and call the <code>getRevealTexture</code> function.</p> <p><em><strong>Question</em></strong>: <strong>Why is my function not retaining it's value when I transition between scenes?</strong></p> <p>If any more clarification is needed please let me know!</p>
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    1. USSneaksta
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    1. COGenerally one would retain an object by sending a retain message. I don't see where you are retaining.
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      1. USJeremy
    2. CO@Sneaksta you need to go look at some introductory info on memory management in objective-c, with specific attention to properties, ARC, and the release/retain cycle. This will clear things up for you. Also, it's standard in objective-c for getters to not have a `get` prefix. That is reserved for a very specific type of method that returns arrays of unsafe values for operations such as fast enumeration.
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      1. USgaige
    3. COThanks @gaige. I will do some more research. It just seems curious to me as I have other methods with getter and setters that seem to work great (retaining values and all)
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