CGSize viewSize = self.window.bounds.size;

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"];

    }

}

UIImageView *launchView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:launchImage]];

launchView.frame = self.window.bounds;

launchView.contentMode = UIViewContentModeScaleAspectFill;

[self.window addSubview:launchView];

[UIView animateWithDuration:2.0f

                      delay:0.0f

                    options:UIViewAnimationOptionBeginFromCurrentState

                 animations:^{

                     launchView.alpha = 0.0f;

                     launchView.layer.transform = CATransform3DScale(CATransform3DIdentity, 1.2, 1.2, );

                 }

                 completion:^(BOOL finished) {

                     [launchView removeFromSuperview];

                 }];