7

我目前正在构建一个弹出模式视图的应用程序,其中包含 WkWebView。当我想在此模态视图中上传图像并出现“照片选择”时,模态视图会返回给启动它的视图控制器。

我怎样才能防止这种情况?

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!

4

3 回答 3

13

我遇到了同样的问题。我发现文件上传操作表在选择一个选项时会尝试自行关闭两次,这也会导致模式也被关闭。

一个解决方案是将UINavigationController包含 webview 的子类化并覆盖dismissViewControllerAnimated以忽略它,除非它实际上具有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。

于 2016-07-07T14:51:00.867 回答
2

对于那些通过使用func dismiss()您无法修复的人可以使用这个技巧:

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

于 2021-09-09T09:53:49.780 回答
0

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

override func dismiss(animated flag: Bool, completion: (() -> Void)? = nil){
    if(self.presentedViewController != nil) 
    {
        super.dismiss(animated: flag, completion: completion)
    }
}
于 2017-12-11T19:17:04.527 回答