how to differentiate events from methods

hi guys, apologies if this is a silly question but i'm trying to learn more about Xcode so pardon me if you will = )

how do i tell if a method is an event that will be called as part of the lifecycle or a custom defined method?

e.g.

-(void)iamdoingsomething
{

}

- (void)viewDidLoad
{
    [super viewDidLoad];
	// Do any additional setup after loading the view, typically from a nib.
    [self configureView];
}

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viewDidLoad is an iOS event whilst iamdoingsomething is my own custom method.

other than click on it whilst holding option, is there any other way i can differentiate? and can i sort all the events at the bottom and all my custom methods at the top? thanks!