How to create AppDelegate shared Instance in iOS?

Question

How to create sharedInstance of AppDelegate and use in my Application anywhere.

Answer 1

Use like this:

In the AppDelegate.h

+ (AppDelegate *)sharedAppDelegate;

In AppDelegate.m

+ (AppDelegate *)sharedAppDelegate{
    return (AppDelegate *)[UIApplication sharedApplication].delegate;
}

Answer 2

declare the statement in Constants.h

#define myappDelegate ((AppDelegate *)[[UIApplication sharedApplication] delegate])

and you can use myappDelegate any where in the app if you declare the Constants.h in .pch file

Check this for PCH for Xcode 6