同样放大2滚动视图

Question

我正在开发Pic Collage类型的应用程序。我有两个滚动视图，如下图所示。

我已使用此代码创建要保存在图库中的图像

UIGraphicsBeginImageContext(self.view.bounds.size);
[self.view.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *resultingImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return resultingImage;

但是这会创建一张320 X 460分辨率图像的图像，这不适合在Facebook / Twitter上分享或添加个人资料或封面照片等。

这就是我尝试在用户点击Done时以编程方式创建所有内容的原因。我面临的唯一问题是我无法在此获得相同的缩放比例。当我以编程方式再次创建所有内容时，滚动视图应该被缩放，以便当我组合640 X 960分辨率图像的视图时，scrollview子视图，即图像也应该看起来像用户在滚动中设置的内容。这是代码：

UIView *mainView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 640, 960)];
        [mainView setBackgroundColor:[UIColor grayColor]];

    UIScrollView *scrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(20, 20, 290, 920)];
    [scrollView setBackgroundColor:[UIColor redColor]];
    [mainView addSubview:scrollView];

    UIScrollView *scrollView11 = [[UIScrollView alloc] initWithFrame:CGRectMake(330, 20, 290, 920)];
    [scrollView11 setBackgroundColor:[UIColor redColor]];
    [mainView addSubview:scrollView11];

    [scrollView1.layer setBorderWidth:0.0];
    [scrollView2.layer setBorderWidth:0.0];

    [[[scrollView1 subviews] objectAtIndex:0] removeFromSuperview];
    [[[scrollView2 subviews] objectAtIndex:0] removeFromSuperview];


    [scrollView1 setFrame:CGRectMake(20, 20, 290, 920)];
    [scrollView2 setFrame:CGRectMake(330, 20, 290, 920)];

    UIImageView *imgV = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 290, 100)];
    [imgV setImage:[self resizeImage:[UIImage imageNamed:@"photo1.png"] width:1166 height:960]];
    //[imgV sizeToFit];
    [scrollView1 addSubview:imgV];

    UIImageView *imgV1 = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 290, 100)];
    [imgV1 setImage:[self resizeImage:[UIImage imageNamed:@"photo2.png"] width:846 height:960]];
    //[imgV1 sizeToFit];
    [scrollView2 addSubview:imgV1];

    scrollView1.contentSize = imgV.image.size;
    scrollView2.contentSize = imgV1.image.size;

    NSLog(@"scrollview subviews - %@",[scrollView1 subviews]);

    [self initScrollView:scrollView1];
    [self initScrollView:scrollView2];

    [self centerScrollViewContents:scrollView1 withImageView:imgV];
    [self centerScrollViewContents:scrollView2 withImageView:imgV1];

    CGFloat newZoomScale = scrollView1.zoomScale;

    // Figure out the rect we want to zoom to, then zoom to it
    CGSize scrollViewSize = scrollView1.bounds.size;

    CGFloat w = scrollViewSize.width / newZoomScale;
    CGFloat h = scrollViewSize.height / newZoomScale;
    CGFloat x = point.x - (w / 2.0f);
    CGFloat y = point.y - (h / 2.0f);

    CGRect rectToZoomTo = CGRectMake(rect.origin.x*2, rect.origin.y*2, rect.size.width*2, rect.size.height*2);
    CGRect rectToZoom = CGRectMake(x, y, w, h);

    [scrollView1 zoomToRect:rectToZoom animated:YES];




     newZoomScale = scrollView2.zoomScale;

    // Figure out the rect we want to zoom to, then zoom to it
     scrollViewSize = scrollView2.bounds.size;

     w = scrollViewSize.width / newZoomScale;
     h = scrollViewSize.height / newZoomScale;
     x = point1.x - (w / 2.0f);
     y = point1.y - (h / 2.0f);

    rectToZoomTo = CGRectMake(rect1.origin.x*2, rect1.origin.y*2, rect1.size.width*2, rect1.size.height*2);
    rectToZoom = CGRectMake(x, y, w, h);

    [scrollView2 zoomToRect:rectToZoom animated:YES];

    [mainView addSubview:scrollView1];
    [mainView addSubview:scrollView2];

    [scrollView1.layer setBorderWidth:0.0];
    [scrollView2.layer setBorderWidth:0.0];

请帮忙。 在此先感谢！