所以我有两个视图,一个是wkwebview,另一个是aboutus视图。在wkwebview中,我有一个按钮指向about us视图,以便用户可以阅读我们的信息。但是,当它们返回到页面时,整个页面都会刷新,我如何阻止这种情况发生?我试过检查segue.identifier,但也没有成功。
override func viewDidLoad() {
super.viewDidLoad()
let screenSize: CGRect = UIScreen.main.bounds
imageViewObject = UIImageView(frame:CGRect(x:0,y: 0, width: screenSize.width, height: screenSize.height))
imageViewObject.image = UIImage(named:"Image")
self.view.addSubview(imageViewObject)
webView.navigationDelegate = self
webView.isHidden = true
let myURL = URL(string: "https://www.google.com")
let myRequest = URLRequest(url: myURL!)
webView.configuration.preferences.javaScriptEnabled = true
webView.allowsBackForwardNavigationGestures = true
webView.load(myRequest)
}
override func viewDidAppear(_ animated: Bool)
{
self.view.addSubview(webView)
}
//this is what i tried but does not work
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "about_us_view"
{
webView.stopLoading();
}
}
关于视图控制器
import UIKit
class AboutUsViewController: UIViewController {
var back_button: UIButton!
var btmbar : UIImageView!
var logo : UIImageView!
override func viewDidLoad() {
super.viewDidLoad()
//let screenSize: CGRect = UIScreen.main.bounds
back_button = UIButton(type: .custom)
back_button.setImage(UIImage(named: "ic_ako_back_inactive"), for: .normal)
back_button.frame = CGRect(x: 0, y: screenHeight - 50, width: 50, height: 50)
back_button.addTarget(self, action: #selector(self.backButtonObj(_:)), for: .touchUpInside)
back_button.isHidden = false
btmbar = UIImageView(frame:CGRect(x:0 ,y: screenHeight-50, width:screenWidth, height: 80))
btmbar.image = UIImage(named: "btm_background_bar")
// Do any additional setup after loading the view.
}
override func viewDidAppear(_ animated: Bool)
{
self.view.addSubview(btmbar)
self.view.addSubview(back_button)
}
@objc func backButtonObj(_ sender: UIButton){ //<- needs `@objc`
performSegue(withIdentifier: "about_us_view", sender: self)
}
public var screenWidth: CGFloat {
return UIScreen.main.bounds.width
}
// Screen height.
public var screenHeight: CGFloat {
return UIScreen.main.bounds.height
}
/*
// MARK: - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
// Get the new view controller using segue.destination.
// Pass the selected object to the new view controller.
}
*/
}
最佳答案
你应该把这个移到viewDidLoad()
self.view.addSubview(webView)
viewWillAppear(),viewdideappear()方法在每次返回viewController时都会被调用,方法是弹出并在代码中添加新的webview实例。
编辑
在后退按钮操作时,它应该弹出viewController,而不是再次执行segue。
@objc func backButtonObj(_ sender: UIButton){
_ = self.navigationController?.popViewController(animated: true)
}
尝试并共享结果
关于swift - 使用performSegue View 时,停止重新加载Webview,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/53061598/