获取LaunchImage图片

- (UIImage *)getLaunchImage {
    UIImage *image = nil;
    CGSize viewSize = [[UIScreen mainScreen] bounds].size;
    NSString *viewOrientation = @"Portrait";    //横屏请设置成 @"Landscape"
    NSString *launchImage = nil;
    //1.通过launchimage获取
    NSArray* imagesDict = [[[NSBundle mainBundle] infoDictionary] valueForKey:@"UILaunchImages"];
    for (NSDictionary* dict in imagesDict) {
        CGSize imageSize = CGSizeFromString(dict[@"UILaunchImageSize"]);
        if (CGSizeEqualToSize(imageSize, viewSize) && [viewOrientation isEqualToString:dict[@"UILaunchImageOrientation"]]) {
            launchImage = dict[@"UILaunchImageName"];
            image = [UIImage imageNamed:launchImage];
        }
    }
    return image;
}