ios - 在 iCarousel 上重用标识符

Question

我正在尝试基于这个项目在我的应用程序上构建一个轮播，https://github.com/nicklockwood/iCarousel ，只有我在 swift 地写它。我让它正常工作，您可以在此处滚动浏览并正确点击索引处的项目:

 func carousel(_ carousel: iCarousel, viewForItemAt index: Int, reusing view: UIView?) -> UIView {
        let tempView = UIView(frame: CGRect(x: 0, y: 130, width: 295, height: 300))
        let object = self.imageFilesArray.object(at: index) as! PFObject

        let imageView = UIImageView()
        imageView.frame = CGRect(x:  0, y: 0 , width: 295, height: 295)
        imageView.layer.cornerRadius = 15
        imageView.layer.masksToBounds = true
        let imageFile  = object.object(forKey: "Image") as! PFFile
        imageFile.getDataInBackground{
            (data, error) -> Void in
            if error == nil {


            }
            imageView.image = UIImage(data: data!)
            tempView.addSubview(imageView)
}
        return tempView
    }



func carousel(_ carousel: iCarousel, didSelectItemAt index: Int) {
let cell = carouselView.itemView(at: index)
        let object = self.imageFilesArray[index] as! PFObject

        if cell?.tag == 0 {

            print("open cell")
            let moveImg = CGAffineTransform(translationX: 0, y: -100)
            UIView.animate(withDuration: 0.4, delay: 0.1, options: [], animations: {
                //cell.imageView.transform = moveImg

                }, completion: nil)
            cell?.tag = 1

        } else if cell?.tag == 1 {

            let storyBoard : UIStoryboard = UIStoryboard(name: "Main", bundle:nil)

            let nextViewController = storyBoard.instantiateViewController(withIdentifier: "EventDetailViewController") as! EventDetailViewController

            self.present(nextViewController, animated:false, completion:nil)

        }

但是，我想要做的是当我点击索引处的项目时，屏幕上的 imageView 转换。我的问题是我无法访问该特定单元格 imageView 以移动它。有谁知道我需要更改什么？

Answer 1

你可以像这样给你的 imageView 一个标签:

let imageView = UIImageView()
imageView.frame = CGRect(x:  0, y: 0 , width: 295, height: 295)
imageView.layer.cornerRadius = 15
imageView.layer.masksToBounds = true
imageView.tag = 2

然后您可以像这样从单元格中检索 imageView:

if let imageView = cell.viewWithTag(2) as? UIImageView {
    imageView.transform = moveImg
}

或

您可以过滤单元格的 subview 并找到可以转换为 UIImageView 的第一个 subview 。虽然这不是很可靠，但请考虑为此单元格创建一个类和 XIB。

cell.subviews.flatMap { $0 as? UIImageView }.first?.transform = moveImg