通过uiview动画来放大图片

UIImage *image=[UIImage imageNamed:@""];

    UIImageView *imageView=[[UIImageView alloc]init];

    imageView.image=image;

    imageView.frame=CGRectMake(, , , );

    [self.view addSubview:imageView];

    [UIView animateKeyframesWithDuration: delay: options:UIViewKeyframeAnimationOptionBeginFromCurrentState animations:^{

        imageView.frame=CGRectMake(, , , );

    } completion:nil];