UIScreen Aspect Ratio (Detecting 4" display)

UIScreen+AspectRation.h

//
//  UIScreen+AspectRatio.h
//
//  Created by Adam Swinden on 14/09/2012.
//  Copyright (c) 2012 The OTHER Media. All rights reserved.
//

#import <UIKit/UIKit.h>


typedef enum {
	UIScreenAspectRatioUnknown,
	UIScreenAspectRatio4by3,
	UIScreenAspectRatio16by9
} UIScreenAspectRatio;


@interface UIScreen (AspectRation)


@property (nonatomic, readonly) UIScreenAspectRatio aspectRatio;


@end

UIScreen+AspectRation.m

//
//  UIScreen+AspectRatio.m
//
//  Created by Adam Swinden on 14/09/2012.
//  Copyright (c) 2012 The OTHER Media. All rights reserved.
//

#import "UIScreen+AspectRatio.h"


@implementation UIScreen (AspectRation)


- (UIScreenAspectRatio)aspectRatio {
	
	float ratio = self.bounds.size.width / self.bounds.size.height;

	if (ratio == 320.0f/480.0f || ratio == 480.0f/320.0f || ratio == 1024.0f/768.0f || ratio == 768.0f/1024.0f) return UIScreenAspectRatio4by3;
	else if (ratio == 320.0f/568.0f || ratio == 568.0f/320.0f) return UIScreenAspectRatio16by9;
	
	return UIScreenAspectRatioUnknown;
}


@end