ios - 如何使用 swift 在 IOS 中的另一个 ImageVIew 上显示一个 Imageview

Question

我是 iOS 新手，请考虑。以下是我设计的屏幕

AttendanceViewController

class AttendanceViewController: UIViewController,UIApplicationDelegate,
    UICollectionViewDelegateFlowLayout,UINavigationControllerDelegate,
    CLLocationManagerDelegate,UIImagePickerControllerDelegate {

    @IBOutlet weak var loginstatus: UILabel!
    @IBOutlet weak var displayloginimg: UIImageView!

    override func viewWillAppear(_ animated: Bool) {

        loginstatus.layer.zPosition = 1

    }

   // start give attendance
    @IBAction func giveLoginbtn(_ sender: Any) {

    }

}

Note: Camera Button is not showing when I load image in the displayloginimg: UIImageView! I add this line loginstatus.layer.zPosition = 1 so Login Label is showing,But Camera Button is not showing..

Answer 1

尝试使用 bringSubviewtoFront 方法将层次结构中的 View 移动到另一个 View 的前面，而不是 layer.zPosition。

self.view.bringSubview(toFront: yourView)

代码:

override func viewWillAppear(_ animated: Bool) {

    self.view.bringSubviewToFront(loginstatus)

}

// start give attendance
@IBAction func giveLoginbtn(_ sender: Any) {

    let camButton = sender as! UIButton
    self.view.bringSubviewToFront(camButton)
}