Question

点击我的imageView后，如何隐藏导航栏，一旦我的imageView被点击，导航栏就会弄乱全屏图像的视图，我想在点击图像时将其隐藏，并在图像重新出现后再次出现被解雇了。这是我的图像被点击的代码。

//expandImage




@IBAction func expand(_ sender: UITapGestureRecognizer) {
    let imageView = sender.view as! UIImageView
    let newImageView = UIImageView(image: imageView.image)
    newImageView.frame = self.view.frame
    newImageView.backgroundColor = .black
    newImageView.contentMode = .scaleAspectFit
    newImageView.isUserInteractionEnabled = true
    let tap = UITapGestureRecognizer(target: self, action: #selector(dismissFullscreen))
    newImageView.addGestureRecognizer(tap)
    self.view.addSubview(newImageView)
}

func dismissFullscreen(_ sender: UITapGestureRecognizer) {
    sender.view?.removeFromSuperview()
}

Answer 1

所以你可以这样做：

class ViewController: UIViewController {

    @IBOutlet weak var imageView: UIImageView!

    override func viewDidLoad() {
        super.viewDidLoad()
        let tapImageScrollView = UITapGestureRecognizer(target: self, action: #selector(imageTapped(_:)))
        imageView.isUserInteractionEnabled = true
        imageView.addGestureRecognizer(tapImageScrollView)
    }

    func imageTapped(_ sender: UIGestureRecognizer) {
        if self.navigationController?.navigationBar.isHidden == false {
            self.navigationController?.navigationBar.isHidden = true
        } else {
            self.navigationController?.navigationBar.isHidden = false
        }
    }
}

所以基本上在你的UITapGestureRecognizer添加imageView，在imageTapped函数中检查navigationBar是否未被隐藏，然后你要显示图像并隐藏navigationBar如果您再次点击imageView，则需要再次显示navigationBar。

只需将imageTapped中的逻辑添加到dismissFullscreen函数中即可。

Answer 2

将此添加到您的expand（）方法：

self.navigationController?.setNavigationBarHidden(true, animated: true)

在dismissFullscreen（）方法中：

self.navigationController?.setNavigationBarHidden(false, animated: true)

或者您可以创建新的ViewController，将图像传递给它（例如使用segue）并将其添加到新ViewController的viewDidLoad（）中：

self.navigationController?.hidesBarsOnTap = true

如何在点击图像时隐藏导航栏

2 个答案: