Not able to call application delegate method

I am 开发者_JAVA百科developing app with finding audio frequency by using FFT. In my app, I am not able to call application delegate method in app delegate class as given in below, but I could able to call other custom methods in app delegate class. What mistake I have done? Please help me!

• (void)applicationDidFinishLaunching:(UIApplication *)application

It looks like your project files have got a bit mixed up. To be honest, it's probably easier to start with a new application template as a base and then add your changes into it. If that is not possible, have a look at the following

In your {project_name}.plist file under the Resources folder you should see a setting

Main nib file base name

This will tell you which nib file is loaded at the start (normally MainWindow). Open this file and have a look for 'Files Owner' 'UIApplication'. Right click on this and there should be a link to the delegate. If it isn't there, then that's your problem

Check to make sure your application delegate inherits from NSObject and NOT NSApplication as NSApplication is a singleton. Otherwise your application object will be its own delegate.

You should now be using application:didFinishLaunchingWithOptions: