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我正在研究 Pic Collage 类型的应用程序。我有两个滚动视图，如下图所示。在此处输入图像描述

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;

但这会创建 320 X 460 分辨率图像的图像，不适合在 facebook/twitter 等上共享或添加为个人资料或封面照片。

这就是为什么我尝试在用户单击完成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这里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，滚动视图子视图，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：

在此处输入图像描述

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。提前致谢！

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