iOS 获取LaunchImage启动图

iOS开发中，LaunchImage图片会根据手机机型的不同，自动匹配对应的图片，而我们如果想要拿到对应的图片，无法直接通过图片的名字获取该启动图，而需要通过以下方式

+ (NSString *)getLaunchImageName

{

    NSString *viewOrientation = @"Portrait";

    if (UIInterfaceOrientationIsLandscape([[UIApplication sharedApplication] statusBarOrientation])) {

        viewOrientation = @"Landscape";

    }

    NSString *launchImageName = nil;

    NSArray* imagesDict = [[[NSBundle mainBundle] infoDictionary] valueForKey:@"UILaunchImages"];

    UIWindow *currentWindow = [[UIApplication sharedApplication].windows firstObject];

    CGSize viewSize = currentWindow.bounds.size;

    for (NSDictionary* dict in imagesDict)

    {

        CGSize imageSize = CGSizeFromString(dict[@"UILaunchImageSize"]);

        if (CGSizeEqualToSize(imageSize, viewSize) && [viewOrientation isEqualToString:dict[@"UILaunchImageOrientation"]])

        {

            launchImageName = dict[@"UILaunchImageName"];

        }

    }

    return launchImageName;

}

这些图片的格式一般是这样子的：

LaunchImage-700-568h

LaunchImage-800-667h

LaunchImage-800-Portrait-736h

LaunchImage-700

...