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POiPhone Memory Management with Properties of Singletons
 

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  1. POiPhone Memory Management with Properties of Singletons
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    <p>I seem to have a fundamental gap in my memory management understanding. The code below is located within a singleton that gets called multiple times within my app to parse data that is downloaded from the web. For each article I download, I allocate a mutable string, then do tons of parsing, then write the file to the file system for later display in a UIWebView. </p> <p>But every time I enter this method, I allocate a new "articleString". And I never release this string. I think this is a leak, but if I add a release at the bottom of this method (after the file is written), my app crashes the next time this method is called. I don't understand why it crashes, since another NSMutableString is allocated next time it is called. </p> <p>UPDATE: I do release articleString in the dealloc method. But it still seems that I should release at the end of this method, since I alloc every time I enter. </p> <p>UPDATE: articleString is defined as follows in the header:</p> <pre><code>@property (nonatomic, retain) NSMutableString *articleString; </code></pre> <p>the parseArticle method below is a placeholder for a series of methods that manipulate articleString. </p> <pre><code> self.articleString = [[NSMutableString alloc] initWithData:articleData encoding:NSUTF8StringEncoding]; //Parse the article for display [self parseArticle]; //Write the article string to a file for later display NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDirectory = [paths objectAtIndex:0]; NSString *path = [documentsDirectory stringByAppendingPathComponent:@"article.html"]; NSLog(@"%@", articleString); [articleString writeToFile:path atomically:YES]; </code></pre>
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    1. USDon Wilson
    1. USDon Wilson
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    1. COWhat's your definition of `@property articleString`? You need to also post the content of `parseArticle`, which might contain some retain/release error.
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      1. USYuji
    2. COSee edited question above. Thx.
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      1. POiPhone Memory Management with Properties of Singletons
      1. USDon Wilson
 

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