我正在创建照片拼贴应用程序。我想像Layout App

The original layout when images are selected for a collage

Layout after resizing image

注意：我没有使用自动版式

我使用以下代码添加了滚动视图

func addScrolls(index: Int) {
    if let templatesArray = self.templates?.templates?[index - 1].scrolls {
        //templatesArray contains the array of dictionary that contains coordinates of the frame
        //If I get coordinates as [(x:0,y:0,width: 160,height: 160),(x:160,(x:0,y:160,height: 160)] from the templatesArray variable
        for dic in templatesArray {
            guard let  x = dic.x else { return }
            guard let y = dic.y else { return }
            guard let width = dic.width else { return }
            guard let height = dic.height else { return }
            let frame = CGRect(x: x,y: y,width: width,height: height)
            let scrollView = UIScrollView(frame: frame)
            scrollView.contentSize = CGSize(width: width,height: height)
            self.superFrame.addSubview(scrollView)
            //superFrame has the frame (0,320,320)
            let frm = CGRect(origin: CGPoint(x: 0,y: 0),size: scrollView.contentSize)
            let imgView = UIImageView(frame: frm)
            imgView.image = UIImage(named: self.imgArr[index])
            scrollView.addSubview(imgView)
        }
    }
}

My collage layout after adding the above code

点击特定图像时，我添加了调整大小按钮，如下面的屏幕截图

Resize buttons added when the image is tapped

如何在拼贴布局中实现缩放功能？

谢谢！