将 Int（数字）从 uitableViewCell 传递给新的 ViewController

Question

这有点傻，但我有一个自定义的 tableViewCell，它有一个 UIScrollView 和 pageControl。一切正常，但我不知道如何将 UITableViewCell 中正在更新的“pageControll.currentPage”发送/传递给我的 ViewImageViewController。

我没有使用“didSelectRowAtIndexPath”。每个单元格都有它独立的不同图像滚动视图和页面控件。

TableViewCell：完美运行

class FriendsFeedTableViewCell: UITableViewCell, UIScrollViewDelegate {

@IBOutlet weak var imageScrollView: UIScrollView!
@IBOutlet weak var pageControl: UIPageControl!

func scrollViewDidEndDecelerating(scrollView: UIScrollView) { //current page: works
    let currentPage = (CGFloat(imageScrollView.contentOffset.x) / CGFloat(userImageView!.frame.size.width))
    pageControl.currentPage = Int(currentPage)
}
}

单元格高度

func tableView(tableView: UITableView, heightForRowAtIndexPath indexPath: NSIndexPath) -> CGFloat {
    return 470
}

TableViewController：

func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {

let cell: FriendsFeedTableViewCell = tableView.dequeueReusableCellWithIdentifier("cell") as! FriendsFeedTableViewCell

//Grabbing array of images from master Image Array
//images array will vary 1-3: as of now
let images = masterImageArray[indexPath.row]

//ScrollView setup
let scrollView = cell.imageScrollView
scrollView.pagingEnabled = true
scrollView.scrollEnabled = true
scrollView.tag = indexPath.row

//setup the image array for scrollView
var imageViews = [UIImageView]()
imageViews.append(cell.imageView_1)
imageViews.append(cell.imageView_2)
imageViews.append(cell.imageView_3)

//hidding all ImageViews: will only show if needed
cell.imageView_1.hidden = true
cell.imageView_2.hidden = true
cell.imageView_3.hidden = true


//tells how many pages will be need
for var i = 0; i < images.count; i++ {
    imageViews[i].image = images[i]
    scrollView.contentSize = CGSize(width: 310 * (i + 1), height: 400)
    cell.pageControl.numberOfPages = (i + 1) // tells how many pages
    imageViews[i].hidden = false
}

//button: Tells which image in indexPath we want to view
cell.tapToViewButton.tag = indexPath.row
cell.tapToViewButton.addTarget(self, action: "buttonPressed:", forControlEvents: .TouchUpInside)

return cell
}

在我的 TableViewViewController 中，我使用了一个按钮，一旦单击它就会触发 preforemSegueWithIdentifier

func buttonPressed(sender: UIButton){
    imageSenderTag = sender.tag        
    self.performSegueWithIdentifier("toViewImageVC", sender: self)
}

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
    if (segue.identifier == "toViewImageVC"){
        let viewImageVC: ViewImageViewController = segue.destinationViewController as! ViewImageViewController

        //moves [image] to next VC
        viewImageVC.imageArrayToPass = masterImageArray[imageSenderTag]
        //FIXME: need to pass "currentPage" (Int) to newViewController
    }
}

我想不通。我已经搜索过，但每个人都在使用我没有使用的“didSelectRowAtIndexPath”。

编辑：----------------

我尝试将@ozgur 和@Mundi 的建议结合起来，但没有成功。

func buttonPressed(sender: UIButton){
    self.performSegueWithIdentifier("toViewImageVC", sender: sender)
}

尝试过：@ozgur 推荐

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {

    if (segue.identifier == "toViewImageVC") {
        let viewImageVC: ViewImageViewController = segue.destinationViewController as! ViewImageViewController
        viewImageVC.mainUserImageToPass = masterUserPicsArray[imageSenderTag]
        viewImageVC.imageArrayToPass = masterImageArray[imageSenderTag]

        if let button = sender as? UIButton {
            let indexPath = NSIndexPath(forRow: button.tag, inSection: 0)
            let cell = resultsTable.cellForRowAtIndexPath(indexPath)

                  //ERROR
            ***viewImageVC.pageNumber = cell!.pageControl.currentPage***
        }

    }
}

错误：“UITableViewCell”类型的值没有成员“pageControl”

UITableViewCell，肯定有pageControl。为什么会这样？它引用了那个单元格信息，对吧？

试用：@Mundi 的推荐

    let button = sender as! UIButton
    let point = button.convertPoint(CGPointZero, toView: self.resultsTable)
    let indexPath = self.resultsTable.indexPathForRowAtPoint(point)!

    let idx = indexPath.row // use this for accessing your image view array

    if (segue.identifier == "toViewImageVC") {
        let viewImageVC: ViewImageViewController = segue.destinationViewController as! ViewImageViewController
        viewImageVC.mainUserImageToPass = masterUserPicsArray[idx]
        viewImageVC.pageNumber = (sender?.tag)! // EXIBIT: A
    }

发送给ViewImageViewController的pageNumber发送的是cell的indexPath.row，而不是indexPath.row中UIScrollView的当前页面

Answer 1

假设您的表格视图中只有一个部分；

首先，您可以在buttonPressed: 方法中将按下的 UIButton 作为 segue 的发送者：

func buttonPressed(sender: UIButton) {    
  self.performSegueWithIdentifier("toViewImageVC", sender: sender)
}

其次，您可以在prepareForSegue方法中使用其tag值获取按钮所属的单元格：

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
  if let button = sender as? UIButton {
    let indexPath = NSIndexPath(forRow: button.tag, inSection: 0)
    let cell = tableView.cellForRowAtIndexPath(indexPath) as! FriendsFeedTableViewCell
    ...
    viewImageVC.currentPage = cell!.pageControl.currentPage
  }
}

如果您有多个部分；可以得到@Mundi所描述的indexPath：

let point = button.convertPoint(CGPointZero, toView: tableView)
let indexPath = tableView.indexPathForRowAtPoint(point)!

Answer 2

调用self.performSegueWithIdentifier 时，传递sender: sender。确保将tag 设置为当前页面。

您现在可以在prepareForSegue 中访问您的Int，如下所示：

let button = sender as! UIButton
let point = button.convertPoint(CGPointZero, toView: self.tableView)
let indexPath = self.tableView.indexPathForRowAtPoint(point)!
let idx = indexPath.row // use this for accessing your image view arrays
viewImageVC.currentPage = sender.tag