Question

I have defined @property(nonatomic,retain)NSString *usrId;
then assigned a value like this:

usrId=[Screen.Info valueForKey:@"id"];

Then in dealloc I am releasing the string usrId. This code is in a viewController which I am pushing to navController, then I’m popping it. But the next time I again push this viewController, an EXC_BAD_ACESS happens at the statement above.

Answer 1

Try assigning your value as

self.usrId = [Screen.Info valueForKey:@"id"];

or

usrId = [[Screen.Info valueForKey:@"id"] retain];

By doing it as you do it you just assign the value of usrId to [Screen.Info valueForKey:@"id"] so when you release it in the dealloc you release whatever is stored in [Screen.Info valueForKey:@"id"] also. Let me know if this works for you.