iOS Universal app experiences?

[thedollarhunter]

Any pointers or experiences good or bad with building a universal app, in particular one that uses OpenGL ES?

I am planning to

Add another nib file with ~ipad.

Check UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad to detirmin iPad or iPhone/iPod.

Set contentScaleFactor if it is available.

if ([[UIScreen mainScreen] respondsToSelector:@selector(displayLinkWithTarget:selector:)] &&
		([UIScreen mainScreen].scale == 2.0)) {
		//NSLog(@"Retina display");
		self.contentScaleFactor=2.0f;//iphone retina scale factor
	} else {
		//NSLog(@"Regular display");
	}

Anything else that needs taking care of?

 

[ArtOfWarfare]

The game I made works great whether on an iPhone or an iPad, even though I only designed it with the iPhone in mind. The controls are just a simple touch left, middle, or right side of the screen, so that simplicity might be part of why it works so well on each device.

 

[thedollarhunter]

I did the opposite which was definitely a rookie mistake

Scaling an iPad game down using glViewport is great but not if you fail to change the controls to suite the smaller screen!

I now know what I am doing this weekend

even though I only designed it with the iPhone in mind