A Sparrow category that allows support for iPad resolution.

Sparrow+SupportPadResolution.h

//
//  Sparrow+SupportPadResolution.h
//  UniversalTextureTest
//
//  Created by Shilo White on 11/7/11.
//  Copyright (c) 2011 Shilocity Productions. All rights reserved.
//

#import <UIKit/UIKit.h>
#import "SPStage.h"
#import "SPUtils.h"

static BOOL sSupportPadResolutions = NO;
static NSString *sPadResolutionsSuffix = @"@hd";

@interface SPStage (PrivateMethods)
+ (void)updateNativeViews;
@end

@interface SPStage (SupportPadResolution)
+ (void)setSupportPadResolutions:(BOOL)supportPadResolutions;
+ (BOOL)supportPadResolutions;
@end

@implementation SPStage (SupportPadResolution)
+ (void)setSupportPadResolutions:(BOOL)supportPadResolutions {
    if (supportPadResolutions != sSupportPadResolutions) {
        sSupportPadResolutions = supportPadResolutions;
        [SPStage updateNativeViews];
    }
}

+ (BOOL)supportPadResolutions {
    return sSupportPadResolutions;
}
@end

@interface SPUtils (SupportPadResolution)
+ (BOOL)isDevicePad;
@end

@implementation SPUtils (SupportPadResolution)
+ (BOOL)isDevicePad {
    return (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad);
}

+ (NSString *)absolutePathToFile:(NSString *)path withScaleFactor:(float)factor {
    NSString *absolutePath = [path isAbsolutePath] ? path : [[NSBundle appBundle] pathForResource:path];
    
    if (factor != 1.0f) {
        NSString *suffix = [NSString stringWithFormat:@"@%@x", [NSNumber numberWithFloat:factor]];
        NSString *pathWithScale = [absolutePath stringByAppendingSuffixToFilename:suffix];
        if ([SPUtils fileExistsAtPath:pathWithScale]) return pathWithScale;
    } else if ([self isDevicePad] && [SPStage supportPadResolutions]) {
        NSString *pathWithPadResolution = [absolutePath stringByAppendingSuffixToFilename:sPadResolutionsSuffix];
        if ([SPUtils fileExistsAtPath:pathWithPadResolution]) return pathWithPadResolution;
    }
    
    if ([SPUtils fileExistsAtPath:absolutePath])
        return absolutePath;
    else
        return nil;
}
@end