Question

我正在尝试根据这个项目https://github.com/nicklockwood/iCarousel在我的应用上构建一个轮播，只有我在swift中写它。我有正确的工作，你可以在这里滚动并点击索引正确的项目：

 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，我要做的是当我点击索引处的项目时，imageView会在屏幕上转换。我的问题是我无法访问特定单元格imageView以便移动它。有谁知道我需要改变什么？

Answer 1

你可以给你的imageView一个这样的标签：

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

然后你就可以从单元格中检索imageView：

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

OR

您可以过滤单元格的子视图，找到可以投射到UIImageView的第一个子视图。虽然这不是非常强大，但请考虑为此单元格创建一个Class和XIB。

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

在iCarousel上重用标识符

1 个答案: