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

Question

我开始搜索时想知道如何与iOS中的其他应用分享.我发现有两个重要的方法

• UIActivityViewController
• UIDocumentInteractionController

在这个SO答案中比较了这些和其他方法.

通常当我学习一个新概念时,我希望看到一个让我入门的基本例子.一旦我得到基本的设置,我可以稍后修改它.

有很多与之相关的问题UIActivityViewController,但我找不到任何只是要求一个简单的例子.由于我刚刚学会了如何做到这一点,我将在下面提供我自己的答案.随意添加一个更好的(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).

将图像添加到Assets.xcassets.我称我为"狮子".

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 = [ UIActivityType.airDrop, UIActivityType.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 = [ UIActivityType.airDrop, UIActivityType.postToFacebook ]

        // present the view controller
        self.present(activityViewController, animated: true, completion: nil)
    }

}

结果

单击"共享一些文本"会在左侧显示结果,单击"共享图像"会在右侧显示结果.

笔记

• 我用iOS 11和Swift 4重新测试了这个.我必须在它运行之前在模拟器中运行它几次因为它超时了.这可能是因为我的电脑很慢.
• 如果您希望隐藏其中一些选项,可以使用excludedActivityTypes上面的代码中所示进行操作.
• 不包括该popoverPresentationController?.sourceView行将导致您的应用程序在iPad上运行时崩溃.
• 这不允许您与其他应用共享文本或图像.你可能想要UIDocumentInteractionController那个.

也可以看看

• 通过UIActivityViewController向Swift应用添加共享
• 来自NSHipster的UIActivity View Controller
• UIActivityViewController 文件
• 分享扩展文档
• 与...比较 UIDocumentInteractionController

Answer 2

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 - 网址

   @IBAction func shareAll(_ sender: UIButton) {
    let text = "This is the text...."
    let image = UIImage(named: "Product")
    let myWebsite = NSURL(string:"https://stackoverflow.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 3

如果你想分享整个屏幕,我发现这可以完美地工作.

@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

就像一个注释,你也可以用于iPad:

activityViewController.popoverPresentationController?.sourceView = sender

因此popover从发件人弹出(在这种情况下是按钮).

Answer 5

您可以使用我在项目的一个帮助器类中编写的以下函数。

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 6

我已经使用了上面的实现，现在我才知道它在运行 iOS 13 的 iPad 上不起作用。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)
}

这就是它对我的作用

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)
    }