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Re: NSTimer retain and release questions
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Re: NSTimer retain and release questions


  • Subject: Re: NSTimer retain and release questions
  • From: Bill <email@hidden>
  • Date: Wed, 10 Sep 2008 11:44:59 -0700


On Sep 10, 2008, at 11:37 AM, Bill Bumgarner wrote:

On Sep 10, 2008, at 11:21 AM, Kyle wrote:
The documentation for this autoreleased method:

+ (NSTimer *)scheduledTimerWithTimeInterval:(NSTimeInterval)seconds target:(id)target selector:(SEL)aSelector userInfo:(id)userInfo repeats:(BOOL)repeats

states: "If repeats is NO, the timer will be invalidated after it fires."

If I call this autoreleased method, and set repeats to YES, does that imply I do not need to retain the object if I want to invalidate it later? In other words, is this autoreleased method autoreleased only when repeats is NO, otherwise it is not autoreleased?

Just want to make sure I understand it correctly. Thanks in advance!

If you receive an autoreleased object, you must retain it if you want to keep it. Doesn't matter what the object is.


b.bum


That's what I thought also. But for NSTimer objects, it seems as if the way to release them is to invalidate them. In the above autoreleased method, if repeats is YES, the object is not invalided, implying it is not autoreleased. If repeats is NO, then the object is autoreleased.


Part of the reason I'm asking is because originally I used the above method with a retain (and released later with the invalidate method), and then ran my app with Leaks, and Leaks told me that the timer was leaking. I removed the retain from my code, and Leaks stopped reporting a leak.

So I'm not sure what is correct.

-Bill

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  • Follow-Ups:
    • Re: NSTimer retain and release questions
      • From: Randall Meadows <email@hidden>
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    • Re: NSTimer retain and release questions
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References: 
 >NSTimer retain and release questions (From: Kyle <email@hidden>)
 >Re: NSTimer retain and release questions (From: Bill Bumgarner <email@hidden>)

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