CGSize viewSize = CGSizeMake(UIScreenWidth, UIScreenHeight);

NSString *viewOrientation = @"Portrait";    //横屏请设置成 @"Landscape"

NSString *launchImage = nil;

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"];

}

}

_img.image = [UIImage imageNamed:launchImage];