UIActivityViewController為WhatsApp或Facebook選擇了不同的文本

Question

我在活動項目中有文本，但現在它在WhatsApp或Facebook上共享，此方法為每個應用共享相同的文本。 每個應用程序可以共享不同的文本嗎？

- (void)share {
    NSString *text = @"share test";

    NSArray * activityItems = @[[NSString stringWithFormat:@"%@", text], [NSURL URLWithString:@"http://www.test.co"]];
    NSArray * applicationActivities = nil;
    NSArray * excludeActivities = @[UIActivityTypeAssignToContact, UIActivityTypeCopyToPasteboard, UIActivityTypePostToWeibo, UIActivityTypePrint, UIActivityTypeMessage];

    UIActivityViewController * activityController = [[UIActivityViewController alloc] initWithActivityItems:activityItems applicationActivities:applicationActivities];
    activityController.excludedActivityTypes = excludeActivities;

    [self presentViewController:activityController animated:YES completion:nil];

    [activityController setCompletionWithItemsHandler:^(NSString *activityType, BOOL completed, NSArray *returnedItems, NSError *activityError) {
        NSLog(@"The setCompletionWithItemsHandler completed = %i", completed);

        if (completed) {
            NSLog(@"The selected activity was %@", activityType);

            if ( [activityType isEqualToString:UIActivityTypeMail]) {
                NSLog(@"Mail sended");
            } else if ( [activityType isEqualToString:UIActivityTypePostToTwitter]) {
                NSLog(@"Post on twitter, ok!");
            } else if ( [activityType isEqualToString:UIActivityTypePostToFacebook]) {
                NSLog(@"Post on facebook, ok!");
            } else if ( [activityType isEqualToString:UIActivityTypeMessage]) {
                NSLog(@"SMS sended!");
            }
        }
    }];
}

Answer 1

簡短的回答：是的！

選擇它們之后，實際上有一種方法可以為多個應用返回不同的內容。

您將必須創建兩個UIActivityItemSource，一個將返回一個UIImage，另一個將返回一個NSObject。 這樣做是為了“欺騙”您將共享這些對象的系統，但是在用戶選擇一個應用程序之后，我們實際上可以返回其他內容，例如URL。

class SocialActivityItem: NSObject, UIActivityItemSource {
    var img: UIImage?
    var url: URL?

    convenience init(img: UIImage, url: URL) {
        self.init()
        self.img = img
        self.url = url
    }

    // This will be called BEFORE showing the user the apps to share (first step)
    func activityViewControllerPlaceholderItem(_ activityViewController: UIActivityViewController) -> Any {
        return img!
    }

    // This will be called AFTER the user has selected an app to share (second step)
    func activityViewController(_ activityViewController: UIActivityViewController, itemForActivityType activityType: UIActivityType?) -> Any? {
        //Instagram
        if activityType?.rawValue == "com.burbn.instagram.shareextension" {
            return img!
        } else {
            return url
        }
    }
}

和

class TextActivityItem: NSObject, UIActivityItemSource {
    var textToShare: String?

    convenience init(textToShare: String) {
        self.init()
        self.textToShare = textToShare
    }

    // This will be called BEFORE showing the user the apps to share (first step)
    func activityViewControllerPlaceholderItem(_ activityViewController: UIActivityViewController) -> Any {
        return NSObject()
    }

    // This will be called AFTER the user has selected an app to share (second step)
    func activityViewController(_ activityViewController: UIActivityViewController, itemForActivityType activityType: UIActivityType?) -> Any? {
      var text = ""
      if activityType?.rawValue == "net.whatsapp.WhatsApp.ShareExtension" {
          text = "Sharing on Whatsapp"
      }

      if activityType == UIActivityType.postToFacebook {
          text = "Sharing on Facebook"
      }
      return text.isEmpty ? textToShare : text
    }
}

然后，您只需要設置所有內容：

let url = URL(string: "www.google.com")!
let socialProvider = SocialActivityItem(img: img, url: url)
let textProvider = TextActivityItem(textToShare: "Sharing on social media!")
let activityViewController = UIActivityViewController(activityItems: [socialProvider, textProvider], applicationActivities: nil)

Answer 2

簡短答案：不可以。

但是您可以使用帶有URL方法的打開的應用程序，並將參數傳遞給該應用程序。 使用該方法時，必須使用自定義UI，並且不能使用UIActivityViewController。 （我所知道的）

因此，如果您想擁有多個按鈕，例如：“與WhatsApp共享”，“與Facebook共享”等，則是可能的。