当wkwebview在iphone上缩小时监听

一 WkWebView 包含一个 scrollView 包含更多子视图以显示网页内容。收听缩放事件,使视图控制器符合 UIScrollViewDelegate :

class ViewController: UIViewController, UIScrollViewDelegate {
    @IBOutlet weak var webView: WKWebView!

    override func viewDidLoad() {
        super.viewDidLoad()

        webView.scrollView.delegate = self
        webView.load(URLRequest(url: URL(string: "https://www.apple.com")!))
    }

    func scrollViewDidZoom(_ scrollView: UIScrollView) {
        print(scrollView.zoomScale)
    }
}