Releasing appDelegate instances? [duplicate]

This question already has answers here: 开发者_运维知识库 Closed 11 years ago.

Possible Duplicate:

When should I release [[UIApplication sharedApplication] delegate] object?

I'm creating instances of UIApplication many times in my app to access shared infos, like this:

MyAppDelegate *appDelegate =  (MyAppDelegate *)[[UIApplication sharedApplication] delegate];
appDelegate.ListingNav.navigationBarHidden = FALSE;

Well, how should it release all these appDelegate objects? Won't they create accumulated memory leaks ?

Thx for helping,

Stephane

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In general, if you do not call alloc or retain, then you do not need to call release. You do not need to release appDelegate in this use case.