Question on retain counts.

okay, i'm steadily working through aaron hilleglasses brilliant book on cocoa , have completed character count program , works.
thing though, i'm quite keen not rely on garbage collection , not sure if i've understood retaining , releasing properly.

initially, thought should ask release typedtext , result , program worked first time , hung. right in thinking nsstring objects dealt nsautorelease pool? other thing i'm not quite sure how retain counts relate ibactions , iboutlets.

grateful hear people thoughts , clear own in process.

code:

#import "countcontroller.h"      @implementation countcontroller    - (ibaction)count:(id)sender  {	  	nsstring *typedtext = [textfield stringvalue];  	nsstring *result = [[nsstring alloc]initwithformat:@"the number of characters in sentence %d",[typedtext length]];  	[countresult setstringvalue:result];  }  @end  

 

you can user method retaincount check retain count of object.

informal rule of apple api whenever object method not started init , autoreleased object.

in case [textfield stringvalue] returns autoreleased object. , after set stringvalue can release object created.

 

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