当我滚动的tableView，我怎么能知道哪个小区触摸绿色区域

Z时代
2024-01-10
分类：问答

The Screen In My Prototype当我滚动的tableView，我怎么能知道哪个小区触摸绿色区域

我的问题是基于The image in the link。因为我的名气是不够的，我不能发表任何的形象在这里

我们假设格林区域的图像中被固定。
而且，我的要求是，当a cell包含GA，that cell's audioPlayer将在单元格说一句话，就像AirPod

OR，你可以把我的要求，因为When a cell contains the GA, the text of that cell's label changes to "Touch the Green"

我的问题是我在滚动tableView的时候怎么能得到which one(Cell)是否包含GA？但我不能找到一种方式来获得（有关该小区一些位置/索引信息）

任何人都可以帮我吗？的ObjectiveC的解决方案是好的，斯威夫特的解决方案是为我好，谢谢你这么多

回答：

override func viewDidAppear(_ animated: Bool) { 
    super.viewDidAppear(animated) 
    // We check cells here to set the state of whether it contains the green or not before the scrolling 
    checkCells() 
} 
func scrollViewDidScroll(_ scrollView: UIScrollView) { 
    // And we are continuously checking cells while scrolling 
    checkCells() 
} 
func checkCells() { 
    tableView.visibleCells.forEach { cell in 
     if let indexPath = tableView.indexPath(for: cell) { 
      let rect = tableView.rectForRow(at: indexPath) 
      // This is the rect in your VC's coordinate system (and not the table view's one) 
      let convertedRect = self.view.convert(rect, from: tableView) 
      if convertedRect.contains(greenArea.frame) { 
       cell.textLabel?.text = "Touch the Green" 
      } else { 
       cell.textLabel?.text = "Does not touch the Green" 
      } 
     } 
    } 
}

回答：

如何像：

func scrollViewDidScroll(_ scrollView: UIScrollView) { 
    [0, 1, 2].forEach { 
     let rect = tableView.rectForRow(at: IndexPath(row: $0, section: 0)) 
     if rect.contain(GAView.frame) { 
      // play sound here 
     } 
    } 
}

回答：

在这段代码中，我使用GreenArea如在UIView中心。 Ruslan's的一些修改答案。

@IBOutlet weak var greenAreaVw: UIView! 
var contHeight : CGFloat = 0.0 
var eachRowHeight : CGFloat = 45 
var topSpaceTableView : CGFloat = 62 
var GreenAreaOriginY : CGFloat = 0.0 
// Give UITableView Edge Insets in ViewDidLoad 
contHeight = ((self.view.frame.size.height/2) - eachRowHeight/2 - topSpaceTableView) 
userTblVw.contentInset = UIEdgeInsets(top: contHeight, left: 0, bottom: contHeight, right: 0) 
userTblVw.contentOffset.y = -contHeight 
GreenAreaOriginY = greenAreaVw.frame.origin.y 
/*-------------------   -----------------------*/ 
func scrollViewDidEndDecelerating(scrollView: UIScrollView) { 
    checkCells() 
} 
func scrollViewDidEndDragging(scrollView: UIScrollView, willDecelerate decelerate: Bool) { 
    checkCells() 
} 
func checkCells() { 
    userTblVw.visibleCells.forEach { cell in 
     if let indexPath = userTblVw.indexPathForCell(cell) { 
      let rect = userTblVw.rectForRowAtIndexPath(indexPath) 
      let convertedRect = self.userTblVw.convertRect(rect, toView: self.view) 
      if convertedRect.origin.y >= GreenAreaOriginY && convertedRect.origin.y < (GreenAreaOriginY + eachRowHeight) 
      { 
       let contFloat : CGFloat = (eachRowHeight * CGFloat(indexPath.row)) - contHeight 
       userTblVw.setContentOffset(CGPoint(x: 0, y: contFloat), animated: true) 
      } 
     } 
    } 
}