获取启动画面图片的string

支持 iPhone  以下. 支持 iPhone 及 iPad
+(NSString*)getLaunchImageName
{

    NSArray* images= @[@"LaunchImage.png", @"LaunchImage@2x.png",@"LaunchImage-700@2x.png",@"LaunchImage-568h@2x.png",@"LaunchImage-700-568h@2x.png",@"LaunchImage-700-Portrait@2x~ipad.png",@"LaunchImage-Portrait@2x~ipad.png",@"LaunchImage-700-Portrait~ipad.png",@"LaunchImage-Portrait~ipad.png",@"LaunchImage-Landscape@2x~ipad.png",@"LaunchImage-700-Landscape@2x~ipad.png",@"LaunchImage-Landscape~ipad.png",@"LaunchImage-700-Landscape~ipad.png"];

    UIImage *splashImage;

    if ([self isDeviceiPhone])
    {
        if ([self isDeviceiPhone4] && [self isDeviceRetina])
        {
            splashImage = [UIImage imageNamed:images[]];
            if (splashImage.size.width!=)
                return images[];
            else
                return images[];
        }
        else if ([self isDeviceiPhone5])
        {
            splashImage = [UIImage imageNamed:images[]];
            if (splashImage.size.width!=)
                return images[];
            else
                return images[];
        }
        else
            return images[]; //Non-retina iPhone
    }
    else if ([[UIDevice currentDevice] orientation]==UIDeviceOrientationPortrait || [[UIDevice currentDevice] orientation] == UIDeviceOrientationPortraitUpsideDown)//iPad Portrait
    {
        if ([self isDeviceRetina])
        {
            splashImage = [UIImage imageNamed:images[]];
            if (splashImage.size.width!=)
                return images[];
            else
                return images[];
        }
        else
        {
            splashImage = [UIImage imageNamed:images[]];
            if (splashImage.size.width!=)
                return images[];
            else
                return images[];
        }

    }
    else
    {
        if ([self isDeviceRetina])
        {
            splashImage = [UIImage imageNamed:images[]];
            if (splashImage.size.width!=)
                return images[];
            else
                return images[];
        }
        else
        {
            splashImage = [UIImage imageNamed:images[]];
            if (splashImage.size.width!=)
                return images[];
            else
                return images[];
        }
    }
}

+(BOOL)isDeviceiPhone
{
    if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone)
    {
        return TRUE;
    }

    return FALSE;
}

+(BOOL)isDeviceiPhone4
{
    if ([[UIScreen mainScreen] bounds].size.height==)
        return TRUE;

    return FALSE;
}

+(BOOL)isDeviceRetina
{
    if ([[UIScreen mainScreen] respondsToSelector:@selector(displayLinkWithTarget:selector:)] &&
        ([UIScreen mainScreen].scale == 2.0))        // Retina display
    {
        return TRUE;
    }
    else                                          // non-Retina display
    {
        return FALSE;
    }
}

+(BOOL)isDeviceiPhone5
{
    if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone && [[UIScreen mainScreen] bounds].size.height>)
    {
        return TRUE;
    }
    return FALSE;
}