Swift：实现快捷方式项目（3D 触摸）共享项目错误“AppDelegate 类型的值没有当前成员”

Posted 2023-02-24

【中文标题】Swift：实现快捷方式项目（3D 触摸）共享项目错误“AppDelegate 类型的值没有当前成员”

【英文标题】：Swift: Implementing shortcutItem(3D touch) share item error "Value of type AppDelegate has no member of present"

【发布时间】：2017-08-02 20:15:25

【问题描述】：

我正在尝试实现 share shortcutItem（我的实现）：

func application(_ application: UIApplication, performActionFor shortcutItem: UIApplicationShortcutItem, completionHandler: @escaping (Bool) -> Void) 
    if shortcutItem.type == "share"
        self.shareItem()
     

func shareItem() 

    let visitedlink = "http://google.com"
    let myWebsite = NSURL(string: visitedlink)
    let img: UIImage = UIImage(named:"Logo")!
    guard let url = myWebsite else 
        print("nothing found")
        return
    
    let shareItems:Array = [img,url]
    let activityViewController:UIActivityViewController = UIActivityViewController(activityItems: shareItems, applicationActivities: nil)
    activityViewController.excludedActivityTypes = [UIActivityType.print, UIActivityType.postToWeibo, UIActivityType.copyToPasteboard, UIActivityType.addToReadingList, UIActivityType.postToVimeo, UIActivityType.message, UIActivityType.mail]

    self.present(activityViewController, animated: true, completion: nil)

但是在这一行：

self.present(activityViewController, animated: true, completion: nil)

我收到此错误：

Value of type AppDelegate has no member of present

你们中有人知道我为什么会收到这个错误吗？或解决这个问题？

非常感谢您的帮助。

【问题讨论】：

错误信息很清楚。 AppDelegate 类不是 UIViewController 的子类。它没有present 方法。

@vadian ：如何在任何视图控制器上实现？

您需要获取对当前顶视图控制器的引用。方式取决于根视图控制器的实现。

【参考方案1】：

试试这个，

public extension UIViewController 
    func shareItem() 
        let visitedlink = "http://google.com"
        let myWebsite = NSURL(string: visitedlink)
        let img: UIImage = UIImage(named:"Logo")!
        guard let url = myWebsite else 
            print("nothing found")
            return
        
        let shareItems:Array = [img,url]
        let activityViewController:UIActivityViewController = UIActivityViewController(activityItems: shareItems, applicationActivities: nil)
        activityViewController.excludedActivityTypes = [UIActivityType.print, UIActivityType.postToWeibo, UIActivityType.copyToPasteboard, UIActivityType.addToReadingList, UIActivityType.postToVimeo, UIActivityType.message, UIActivityType.mail]

        self.present(activityViewController, animated: true, completion: nil)