Screen State Library

gistfile1.m

/* ========================================
ScreenStateLibrary.h
======================================== */
#import <Foundation/Foundation.h>

@interface ScreenStateLibrary : NSObject

//4インチスクリーン判定
//YES=4inch、NO=4inch以外（3.5inch or iPad）
+(BOOL)is4inch;

//iPad判定
//YES=iPad、NO=iPad以外
+(BOOL)isPad;

//Retinaディスプレイ判定
//YES=Retinaディスプレイ、NO=Retinaディスプレイ以外
+(BOOL)isRetina;

@end

/* ========================================
ScreenStateLibrary.m
======================================== */
#import "ScreenStateLibrary.h"

@implementation ScreenStateLibrary

//4インチスクリーン判定
+(BOOL)is4inch {
    //iPadの場合はNOを返却
    if ([self isPad]) { return NO; }
    //画面サイズ判定（4インチの場合、320x568となる）
    return ([[UIScreen mainScreen] bounds].size.height >= 568.0);
}

//iPad判定
+(BOOL)isPad{
    return (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad);
}

//Retinaディスプレイ判定
+(BOOL)isRetina{
    if ([[UIScreen mainScreen] respondsToSelector:@selector(scale)]
        && [[UIScreen mainScreen] scale] == 2.0) {
        return YES;
    } else {
        return NO;
    }
}

@end

/* ========================================
使い方
======================================== */
-(void)viewLayout4inch {
    //4インチスクリーンのレイアウト
}
-(void)viewLayoutDefault {
    //4インチ以外のスクリーンのレイアウト
}
- (void)loadView {
    //スクリーンサイズによる画面調整
    if ([ScreenStateLibrary is4inch]) {
        [self viewLayout4inch];
    } else {
        [self viewLayoutDefault];
    }
}