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Editorial Team
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Asked: 2026-05-27T04:37:37+00:00

Little confused about the message from Analyze command in Xcode 4.2. It complains about

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Little confused about the message from Analyze command in Xcode 4.2. It complains about the instance variable activityView.

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Analyze tool complains on [self startRefresh:NULL] line about potential leak of activityView.

  1. activityView is an instance variable, and is synthesized
  2. I am releasing activityView in dealloc()
  3. Per my understanding, when the setter is used (implicitly via self.activityView), the previous value is released, right?

So, I how should I read the warning from the Analyze tool? Or what changes do I need?

Thx.

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1 Answer

  1. Editorial Team

    Assuming the @property has the retain attribute, the setter will retain this new activity view, so you are still responsible for the +1 count from the alloc/init.

    So you can do something like this:

    self.activityView = [[[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhite] autorelease];

    Just autorelease the new instance to balance out the alloc/init.

    The analyzer isn’t warning you about the previous value of activityView. It’s warning you about the new instance, which effectively has a +2 retain count after your alloc/init and the @property (retain).

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