在 UIWebView 中选择图像时模态视图关闭 iOS

Modal view closes when selecting an image in UIWebView iOS

我目前正在构建一个包含 WkWebView 的弹出模式视图的应用程序。当我想在此模态视图中上传图像并出现照片选择时,模态视图会返回到启动它的视图控制器。

我该如何预防?

import UIKit

class PostWindow : UIViewController {

@IBAction func close(sender: AnyObject) {
    dismissViewControllerAnimated(true, completion: nil)
}

override func viewDidLoad() {
    super.viewDidLoad()
    // do stuff here
    let myWebView:UIWebView = UIWebView(frame: CGRectMake(0, 70, UIScreen.mainScreen().bounds.width, UIScreen.mainScreen().bounds.height))
    myWebView.loadRequest(NSURLRequest(URL: NSURL(string: "https://m.facebook.com/")!))
    self.view.addSubview(myWebView)

    self.title = "News Feed"

    UIApplication.sharedApplication().setStatusBarStyle(UIStatusBarStyle.Default, animated: true)
    UIApplication.sharedApplication().statusBarHidden = false

    /*let addButton: UIBarButtonItem = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.Search,
    target: self,
    action: #selector(self.openSearch(_:)))
    self.navigationItem.setRightBarButtonItems([addButton], animated: true)*/
    self.navigationController?.navigationBar.tintColor = UIColor.blackColor()
}

override func preferredStatusBarStyle() -> UIStatusBarStyle {
    return UIStatusBarStyle.LightContent
}

}

谢谢!

我遇到了同样的问题。我发现文件上传操作 sheet 会在选择一个选项时尝试自行关闭两次,这会导致模式也被关闭。

一个解决方案是将包含 webview 的 UINavigationController 子类化并覆盖 dismissViewControllerAnimated 以忽略它,除非它实际上有一个 presentedViewController

像这样:

override func dismissViewControllerAnimated(flag: Bool, completion: (() -> Void)?) {
    if (self.presentedViewController != nil) {
        super.dismissViewControllerAnimated(flag, completion: completion)
    }
}

如果您不使用导航控制器,只需在 webview 中覆盖此方法即可。

它也适用于非 NavigationController / ViewController 仅以这种方式:

override func dismiss(animated flag: Bool, completion: (() -> Void)? = nil){
    if(self.presentedViewController != nil) 
    {
        super.dismiss(animated: flag, completion: completion)
    }
}

对于那些使用 func dismiss() 无法修复的人,您可以使用这个技巧:

extension UIImagePickerController {
  open override func viewDidLoad() {
    super.viewDidLoad()
    self.modalPresentationStyle = .overFullScreen // this will turn off dismiss of webView when imagePicker presents
  }
}