在 Swift 中使用 UIActivityViewController 共享文本或图像的基本示例

Question

我开始搜索是想知道如何分享到 iOS 中的其他应用程序。我发现两个重要的方法是

UIActivityViewController
UIDocumentInteractionController

在 this SO answer 中比较了这些方法和其他方法。

通常当我学习一个新概念时，我喜欢看一个基本的例子来帮助我入门。一旦我完成了一些基本设置，我就可以稍后根据自己的喜好对其进行修改。

有很多与 UIActivityViewController 相关的 SO 问题，但我找不到任何只是要求一个简单示例的问题。由于我刚刚学会了如何执行此操作，因此我将在下面提供自己的答案。欢迎添加更好的版本（或 Objective-C 版本）。

Answer 1

UIActivityViewController 示例项目

使用两个按钮设置故事板并将它们连接到视图控制器（请参阅下面的代码）。

将图片添加到您的 Assets.xcassets。我叫我的“狮子”。

代码

import UIKit
class ViewController: UIViewController {
    
    // share text
    @IBAction func shareTextButton(_ sender: UIButton) {
        
        // text to share
        let text = "This is some text that I want to share."
        
        // set up activity view controller
        let textToShare = [ text ]
        let activityViewController = UIActivityViewController(activityItems: textToShare, applicationActivities: nil)
        activityViewController.popoverPresentationController?.sourceView = self.view // so that iPads won't crash
        
        // exclude some activity types from the list (optional)
        activityViewController.excludedActivityTypes = [ UIActivity.ActivityType.airDrop, UIActivity.ActivityType.postToFacebook ]
        
        // present the view controller
        self.present(activityViewController, animated: true, completion: nil)
        
    }
    
    // share image
    @IBAction func shareImageButton(_ sender: UIButton) {
        
        // image to share
        let image = UIImage(named: "Image")
        
        // set up activity view controller
        let imageToShare = [ image! ]
        let activityViewController = UIActivityViewController(activityItems: imageToShare, applicationActivities: nil)
        activityViewController.popoverPresentationController?.sourceView = self.view // so that iPads won't crash
        
        // exclude some activity types from the list (optional)
        activityViewController.excludedActivityTypes = [ UIActivity.ActivityType.airDrop, UIActivity.ActivityType.postToFacebook ]
        
        // present the view controller
        self.present(activityViewController, animated: true, completion: nil)
    }
    
}

结果

点击“分享一些文字”在左侧给出结果，点击“分享图片”在右侧给出结果。

备注

我用 iOS 11 和 Swift 4 重新测试了这个。我不得不在模拟器中运行它几次才能工作，因为它超时了。这可能是因为我的电脑速度慢。
如果您希望隐藏其中一些选项，您可以使用 excludedActivityTypes 来实现，如上面的代码所示。
不包含 popoverPresentationController?.sourceView 行将导致您的应用程序在运行 iPad 时崩溃。
这不允许您与其他应用共享文本或图像。你可能想要 UIDocumentInteractionController。

另见

Add sharing to your Swift app via UIActivityViewController
UIActivityViewController 来自 NSHipster
UIActivityViewController documentation
Share extension documentation
comparison with UIDocumentInteractionController

Answer 2

请注意，您也可以将此用于 iPad：

activityViewController.popoverPresentationController?.sourceView = sender

因此弹出窗口从发件人处弹出（在这种情况下是按钮）。

Answer 3

如果你想共享整个屏幕，我发现这个可以完美地工作。

@IBAction func shareButton(_ sender: Any) {

    let bounds = UIScreen.main.bounds
    UIGraphicsBeginImageContextWithOptions(bounds.size, true, 0.0)
    self.view.drawHierarchy(in: bounds, afterScreenUpdates: false)
    let img = UIGraphicsGetImageFromCurrentImageContext()
    UIGraphicsEndImageContext()
    let activityViewController = UIActivityViewController(activityItems: [img!], applicationActivities: nil)
    activityViewController.popoverPresentationController?.sourceView = self.view
    self.present(activityViewController, animated: true, completion: nil)
}

Answer 4

你可以在项目中使用我在我的一个助手class中编写的以下功能。

只要打电话

showShareActivity(msg:"message", image: nil, url: nil, sourceRect: nil)

它适用于 iPhone 和 iPad。如果您通过 sourceRect 传递任何视图的 CGRect 值，它也会在 iPad.

中显示一个小箭头

func topViewController()-> UIViewController{
    var topViewController:UIViewController = UIApplication.shared.keyWindow!.rootViewController!

    while ((topViewController.presentedViewController) != nil) {
        topViewController = topViewController.presentedViewController!;
    }

    return topViewController
}

func showShareActivity(msg:String?, image:UIImage?, url:String?, sourceRect:CGRect?){
    var objectsToShare = [AnyObject]()

    if let url = url {
        objectsToShare = [url as AnyObject]
    }

    if let image = image {
        objectsToShare = [image as AnyObject]
    }

    if let msg = msg {
        objectsToShare = [msg as AnyObject]
    }

    let activityVC = UIActivityViewController(activityItems: objectsToShare, applicationActivities: nil)
    activityVC.modalPresentationStyle = .popover
    activityVC.popoverPresentationController?.sourceView = topViewController().view
    if let sourceRect = sourceRect {
        activityVC.popoverPresentationController?.sourceRect = sourceRect
    }

    topViewController().present(activityVC, animated: true, completion: nil)
}

Answer 5

分享：文字

@IBAction func shareOnlyText(_ sender: UIButton) {
    let text = "This is the text....."
    let textShare = [ text ]
    let activityViewController = UIActivityViewController(activityItems: textShare , applicationActivities: nil)
    activityViewController.popoverPresentationController?.sourceView = self.view 
    self.present(activityViewController, animated: true, completion: nil)
}
}

分享： 图片

@IBAction func shareOnlyImage(_ sender: UIButton) {
    let image = UIImage(named: "Product")
    let imageShare = [ image! ]
    let activityViewController = UIActivityViewController(activityItems: imageShare , applicationActivities: nil)
    activityViewController.popoverPresentationController?.sourceView = self.view 
    self.present(activityViewController, animated: true, completion: nil)
 }

分享：文字-图片-URL

   @IBAction func shareAll(_ sender: UIButton) {
    let text = "This is the text...."
    let image = UIImage(named: "Product")
    let myWebsite = NSURL(string:"https://whosebug.com/users/4600136/mr-javed-multani?tab=profile")
    let shareAll= [text , image! , myWebsite]
    let activityViewController = UIActivityViewController(activityItems: shareAll, applicationActivities: nil)
    activityViewController.popoverPresentationController?.sourceView = self.view 
    self.present(activityViewController, animated: true, completion: nil)
   }

Answer 6

我已经使用了上面的实现，现在我才知道它不适用于 iPad 运行 iOS 13。我必须在 present() 调用之前添加这些行才能使其工作

//avoiding to crash on iPad
if let popoverController = activityViewController.popoverPresentationController {
     popoverController.sourceRect = CGRect(x: UIScreen.main.bounds.width / 2, y: UIScreen.main.bounds.height / 2, width: 0, height: 0)
     popoverController.sourceView = self.view
     popoverController.permittedArrowDirections = UIPopoverArrowDirection(rawValue: 0)
}

这就是我的工作方式

func shareData(_ dataToShare: [Any]){

        let activityViewController = UIActivityViewController(activityItems: dataToShare, applicationActivities: nil)

        //exclude some activity types from the list (optional)
        //activityViewController.excludedActivityTypes = [
            //UIActivity.ActivityType.postToFacebook
        //]

        //avoiding to crash on iPad
        if let popoverController = activityViewController.popoverPresentationController {
            popoverController.sourceRect = CGRect(x: UIScreen.main.bounds.width / 2, y: UIScreen.main.bounds.height / 2, width: 0, height: 0)
            popoverController.sourceView = self.view
            popoverController.permittedArrowDirections = UIPopoverArrowDirection(rawValue: 0)
        }

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

在 Swift 中使用 UIActivityViewController 共享文本或图像的基本示例

Basic example for sharing text or image with UIActivityViewController in Swift

ios

uiactivityviewcontroller

swift

UIActivityViewController 示例项目

代码

结果

备注

另见