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POLeak when setting MKAnnotation Title and SubTitle
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  1. POLeak when setting MKAnnotation Title and SubTitle
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    copied!<p>I have a leak with the following code that builds up! Why do I have this issue? Is it due to it copying the properties inside the NSString. Is there a way around this?</p> <pre><code>@property (nonatomic, copy) NSString *reg; @property (nonatomic, copy) NSString *reg2; @property (nonatomic, copy) NSNumber *altitude; @property (nonatomic, copy) NSNumber *heading; -(void)updateTitles{ self.title=[NSString stringWithFormat:@"%@ %@",self.reg,self.reg2]; self.subtitle = [NSString stringWithFormat:@"%@ft %@°",self.altitude,self.heading]; } </code></pre> <p>The leak is 50% on each of the setting of properties inside this method.</p> <p><strong>UPDATE</strong></p> <p>Turns out this was being called from a block ultimately. To try and work around this I did the following.</p> <p>The following works but still leaks, clear now that self is retained.</p> <pre><code>-(void)updateTitles{ __block NSString *thisTitle = [[NSString alloc] initWithFormat:@"%@ %@",self.reg1,self.reg2]; __block NSString *subTitle = [[NSString alloc] initWithFormat:@"%@ft %@°",self.altitude,self.heading]; dispatch_queue_t mainQueue = dispatch_get_main_queue(); dispatch_async(mainQueue,^(){ self.title=thisTitle; self.subtitle = subTitle; [thisTitle release]; [subTitle release]; }); } </code></pre> <p>However that leaks and the following which should in theory work gives an unrecognised selector on the setTitle method!!!!!</p> <pre><code>-(void)updateTitles{ __block NSString *thisTitle = [[NSString alloc] initWithFormat:@"%@ %@",self.reg1,self.reg2]; __block NSString *subTitle = [[NSString alloc] initWithFormat:@"%@ft %@°",self.altitude,self.heading]; __block __typeof__(self) blockSelf = self; dispatch_queue_t mainQueue = dispatch_get_main_queue(); dispatch_async(mainQueue,^(){ [blockSelf setTitle:thisTitle]; [blockSelf setSubtitle:subTitle]; [thisTitle release]; [subTitle release]; }); } </code></pre>
 

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