如何在点击图像时隐藏导航栏-Java 学习之路

一旦我的imageView被点击，我将如何隐藏导航栏，一旦我的图像被点击，导航栏就会弄乱全屏图像的视图，我希望在点击图像时隐藏它，并在图像被解除后重新出现 . 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()
}

2 回答

1
将其添加到您的expand（）方法：
```
self.navigationController?.setNavigationBarHidden(true, animated: true)
```
并在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
```
回复于 2024-04-27T06:50:11+08:00

所以这是你如何做到这一点：

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
        }
    }
}

因此，基本上将 UITapGestureRecognizer 添加到 imageView 并在 imageTapped 函数中检查 navigationBar 是否未隐藏，然后您要显示图像并隐藏 navigationBar ，如果再次单击 imageView ，则需要再次显示 navigationBar .

因此，只需将imageTapped中的逻辑添加到 dismissFullscreen 函数中即可 .

回复于 2024-04-27T06:50:11+08:00

如何在点击图像时隐藏导航栏

2 回答

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