如何在点击tableViewCell时将UIImageView放到前台？

Z时代
2024-01-10
分类：问答

目前缩略图中的UITableViewCell并在轻敲细胞中被示出，我想要显示在前景中的图像与右顶部的横/ X按钮关闭该图像并显示的tableView。我有下面的代码在didSelectRow：如何在点击tableViewCell时将UIImageView放到前台？

let hoverImage = UIImageView() 
    hoverImage.image = UIImage(named: "splashpt") 
    hoverImage.contentMode = .scaleAspectFit 
    self.view.addSubview(hoverImage) 
    hoverImage.center = self.view.center 
    hoverImage.layer.zPosition = 5 
    self.view.bringSubview(toFront: hoverImage)

静止图像不显示。计算是击中代码的这一部分，因为我能够调试并逐步完成这部分代码。但屏幕上没有显示。我正在使用zPosition和bringSubview(toFront:)，这两者似乎都不适合我的要求。任何帮助将不胜感激。谢谢。

回答：

这是一个演示表view.On轻敲表视图单元的视图POP操作了关闭按钮。然后按下关闭按钮弹出视图关闭。

import UIKit 
class ViewController: UITableViewController { 
override func viewDidLoad() { 
    super.viewDidLoad() 
    // Do any additional setup after loading the view, typically from a nib. 
} 
override func didReceiveMemoryWarning() { 
    super.didReceiveMemoryWarning() 
    // Dispose of any resources that can be recreated. 
} 
override func numberOfSectionsInTableView(tableView: UITableView) -> Int { 
    return 1 
} 
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int { 
    return 5 
} 
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell { 
    let cell:UITableViewCell = self.tableView.dequeueReusableCellWithIdentifier("cell")! as UITableViewCell 
    cell.textLabel?.text = "Happy" 
    return cell 
} 
override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) { 
    print("Cell\(indexPath.row) is selected") 
    let storyBoard = UIStoryboard(name: "Main", bundle: nil) 
    let popoverVC = storyBoard.instantiateViewControllerWithIdentifier("PopViewController") as! PopViewController 
    popoverVC.delegate = parentViewController as? InfoViewDelegate 
    let nav = UINavigationController(rootViewController: popoverVC) 
    nav.modalPresentationStyle = UIModalPresentationStyle.Popover 
    nav.navigationBar.hidden = true 
    self.presentViewController(nav, animated: true) 
    { 
    } 
    popoverVC.passingViewController = self 
} 
}

这是一个PopUpViewController：

import UIKit 
protocol InfoViewDelegate: class 
{ 
func infoViewClicked(tag: Int) 
} 
class PopViewController :UIViewController 
{ 
@IBOutlet weak var btnClose: UIButton! 
var delegate = InfoViewDelegate?() 
var passingViewController: UIViewController! 
override func viewDidLoad() { 
    super.viewDidLoad() 
    // Do any additional setup after loading the view. 
} 
override func didReceiveMemoryWarning() { 
    super.didReceiveMemoryWarning() 
    // Dispose of any resources that can be recreated. 
} 
override func viewWillAppear(animated: Bool) { 
} 
override func viewDidDisappear(animated: Bool) { 
    self.presentingViewController?.dismissViewControllerAnimated(true 
     , completion: { 
    }) 
} 
/* 
// MARK: - Navigation 
// In a storyboard-based application, you will often want to do a little preparation before navigation 
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) { 
// Get the new view controller using segue.destinationViewController. 
// Pass the selected object to the new view controller. 
} 
*/ 
@IBAction func btnClicked(sender: UIButton) { 
    if(sender == self.btnClose) 
    { 
     self.delegate?.infoViewClicked(1) 
     self.presentingViewController?.dismissViewControllerAnimated(true 
      , completion: { 
     }) 
    } 
} 
}