问题
I'm creating an application to share images via social media platforms but on WhatsApp especially. I tried using UIActivityViewController but it doesn't display the WhatsApp option when the sheet is shown. I searched online and found the code below: This shows the WhatsApp option when the sheet is displayed but choosing the WhatsApp option causes the application to crash. This is the code:
let controller = UIDocumentInteractionController()
let path = NSSearchPathForDirectoriesInDomains(.DocumentDirectory,.UserDomainMask, true)
let documentDir = path[0] as String
let imgPath=documentDir.stringByAppendingPathComponent("tmp_flag.png")
let imageURL = NSURL.fileURLWithPath(imgPath)
println("Image path :\(imageURL)")
controller.delegate = self
controller.UTI = "net.whatsapp.image"
controller.URL = imageURL!
controller.presentOpenInMenuFromRect(CGRectZero, inView: self.view, animated: true)
Can anyone spot any error somewhere? If not, does anyone have any idea how to make it work?
回答1:
In Swift 3 use this code
@IBAction func whatsappShareWithImages(_ sender: AnyObject) {
let urlWhats = "whatsapp://app"
if let urlString = urlWhats.addingPercentEncoding(withAllowedCharacters:CharacterSet.urlQueryAllowed) {
if let whatsappURL = URL(string: urlString) {
if UIApplication.shared.canOpenURL(whatsappURL as URL) {
if let image = UIImage(named: "whatsappIcon") {
if let imageData = UIImageJPEGRepresentation(image, 1.0) {
let tempFile = URL(fileURLWithPath: NSHomeDirectory()).appendingPathComponent("Documents/whatsAppTmp.wai")
do {
try imageData.write(to: tempFile, options: .atomic)
self.documentInteractionController = UIDocumentInteractionController(url: tempFile)
self.documentInteractionController.uti = "net.whatsapp.image"
self.documentInteractionController.presentOpenInMenu(from: CGRect.zero, in: self.view, animated: true)
} catch {
print(error)
}
}
}
} else {
print("Cannot open whatsapp")
}
}
}
}
Add this code in your app **plist**
<key>LSApplicationQueriesSchemes</key>
<array>
<string>whatsapp</string>
</array>
You can also refer to small app for reference : https://github.com/nithinbemitk/iOS-Whatsapp-Share
回答2:
You need to make the controller a member variable of the class, because controller must be retained.
回答3:
I would like to share mini class for sharing image on Whatsapp, Instagram, Facebook and activity, it may helps someone..
/* Common steps to use these codes */
// 1- Download FBSharekit for sharing on Facebook
// 2- Copy and Paste the following text to your "info.plist" (anywhere)
/*
<key>FacebookAppID</key>
<string>08760425023140553</string> //This is a mock id, you must add your own real app id else it never will work
<key>FacebookDisplayName</key>
<string>DoYourBest</string> //Add your real app name here
<key>LSApplicationQueriesSchemes</key>
<array>
<string>whatsapp</string>
<string>instagram</string>
<string>fbapi</string>
<string>fb-messenger-share-api</string>
<string>fbauth2</string>
<string>fbshareextension</string>
</array>
*/
import FBSDKShareKit
class ShareHelper: NSObject {
static func shareImageViaWhatsapp(image: UIImage, onView: UIView) {
let urlWhats = "whatsapp://app"
if let urlString = urlWhats.addingPercentEncoding(withAllowedCharacters:CharacterSet.urlQueryAllowed) {
if let whatsappURL = URL(string: urlString) {
if UIApplication.shared.canOpenURL(whatsappURL as URL) {
guard let imageData = image.pngData() else { debugPrint("Cannot convert image to data!"); return }
let tempFile = URL(fileURLWithPath: NSHomeDirectory()).appendingPathComponent("Documents/whatsAppTmp.wai")
do {
try imageData.write(to: tempFile, options: .atomic)
self.documentInteractionController = UIDocumentInteractionController(url: tempFile)
self.documentInteractionController.uti = "net.whatsapp.image"
self.documentInteractionController.presentOpenInMenu(from: CGRect.zero, in: onView, animated: true)
} catch {
self.callAlertView(title: NSLocalizedString("information", comment: ""),
message: "There was an error while processing, please contact our support team.",
buttonText: "Close", fromViewController: topViewController!)
return
}
} else {
self.callAlertView(title: NSLocalizedString("warning", comment: ""),
message: "Cannot open Whatsapp, be sure Whatsapp is installed on your device.",
buttonText: "Close", fromViewController: topViewController!)
}
}
}
}
static func shareImageViaInstagram(image: UIImage, onView: UIView) {
let urlWhats = "instagram://app"
if let urlString = urlWhats.addingPercentEncoding(withAllowedCharacters:CharacterSet.urlQueryAllowed) {
if let whatsappURL = URL(string: urlString) {
if UIApplication.shared.canOpenURL(whatsappURL as URL) {
guard let imageData = image.pngData() else { debugPrint("Cannot convert image to data!"); return }
let tempFile = URL(fileURLWithPath: NSHomeDirectory()).appendingPathComponent("Documents/fitbestPhoto.igo")
do {
try imageData.write(to: tempFile, options: .atomic)
self.documentInteractionController = UIDocumentInteractionController(url: tempFile)
self.documentInteractionController.uti = "com.instagram.exclusivegram"
self.documentInteractionController.presentOpenInMenu(from: CGRect.zero, in: onView, animated: true)
} catch {
self.callAlertView(title: NSLocalizedString("information", comment: ""),
message: "There was an error while processing, please contact our support team.",
buttonText: "Close", fromViewController: topViewController!)
return
}
} else {
self.callAlertView(title: NSLocalizedString("warning", comment: ""),
message: "Cannot open Instagram, be sure Instagram is installed on your device.",
buttonText: "Close", fromViewController: topViewController!)
}
}
}
}
static func shareImageViaFacebook(image: UIImage, fromViewController: UIViewController) {
let sharePhoto = FBSDKSharePhoto()
sharePhoto.image = image
sharePhoto.isUserGenerated = true
let content = FBSDKSharePhotoContent()
content.photos = [sharePhoto]
let dialog = FBSDKShareDialog()
dialog.delegate = (fromViewController as! FBSDKSharingDelegate)
dialog.fromViewController = fromViewController
dialog.shareContent = content
dialog.mode = .shareSheet
dialog.show()
}
static func shareImageViaActivity(image: UIImage, onView: UIViewController) {
let vc = UIActivityViewController(activityItems: [image], applicationActivities: [])
// so that iPads won't crash
if UIDevice.currentDevice().userInterfaceIdiom == .Pad {
if let popoverController = vc.popoverPresentationController {
popoverController.sourceView = onView.view
popoverController.sourceRect = CGRect(x: onView.view.bounds.midX, y: onView.view.bounds.maxY, width: 0, height: 0)
popoverController.permittedArrowDirections = []
}
}
// exclude some activity types from the list (optional)
onView.present(vc, animated: true)
}
}
NOTE = self.callAlertView(params...) is a method for calling customized UIAlertViewController so you can remove it and put your own logic code there.
////////////////////////////////////////////////////////////////////////
UPDATE = I added sharing video via Whatsapp inside same function it it should changed like this :
/**
Shares photo or video via Whatsapp app if it's installed on device
else it will navigate user to App Store Whatsapp page
- Parameter sender: UIButton to show popup on this component.
- Variable `isVideoMode`: Define var as `Bool` to specify type of sharing content.
- Used functions: `getVideoData()` it's simple func converting video url to data
- Used function: `CommonUtils.callAlertView(...)` it's simple func shows alert popup
*/
private func shareViaWhatsapp(sender: UIButton) {
let urlWhats = "whatsapp://app"
if let urlString = urlWhats.addingPercentEncoding(withAllowedCharacters:CharacterSet.urlQueryAllowed) {
if let whatsappURL = URL(string: urlString) {
if UIApplication.shared.canOpenURL(whatsappURL as URL) {
let mediaData = isVideoMode ? getVideoData() : self.sharingImage?.jpegData(compressionQuality: 1.0)
let filepath: String = isVideoMode ? "Documents/whatsAppTmp.wam" : "Documents/whatsAppTmp.wai"
let tempFile = URL(fileURLWithPath: NSHomeDirectory()).appendingPathComponent(filepath)
let uti: String = isVideoMode ? "net.whatsapp.movie" : "net.whatsapp.image"
if let mediaData = mediaData {
do {
try mediaData.write(to: tempFile, options: .atomic)
self.docIntController = UIDocumentInteractionController(url: tempFile)
self.docIntController?.uti = uti
self.docIntController?.presentOpenInMenu(from: .zero, in: sender, animated: true)
} catch let error {
CommonUtils.callAlertView(title: NSLocalizedString("information", comment: ""),
message: "There was an error while processing due to :\(error.localizedDescription)",
buttonText: "Close", fromViewController: self)
return
}
}
} else {
let storeUrlString = "https://itunes.apple.com/in/app/whatsapp-messenger/id310633997?mt=8"
UIApplication.shared.open(URL(string: storeUrlString)!, options: [:], completionHandler: nil)
}
}
}
}
来源：https://stackoverflow.com/questions/28492869/share-image-on-whatsapp-using-swift