UIActivityViewControllerCompletionHandler如何？(UIAct

我试图用UIActivityViewControllerCompletionHandler ，但我不完全得到怎样..

我想要当用户结束或驳回该视图控制器 （检测UIActivityViewController ）。

任何人都知道怎么样？

Answer 1:

typedef void (^UIActivityViewControllerCompletionHandler)
    (NSString *activityType, BOOL completed);

完成处理的第二个参数告诉你用户是否驳回了控制器。 如果他们驳回了控制器， completed将被设置为NO 。

还有更多的细节完成处理的文档 。

Answer 2:

下面是如何显示共享对话框，设置它的完成处理

NSArray *imageArray = [NSArray arrayWithObject:shareImage];

UIActivityViewController *sharing = [[UIActivityViewController alloc] initWithActivityItems:imageArray applicationActivities:nil];

[sharing setCompletionHandler:^(NSString *activityType, BOOL completed) {
    NSLog(@"completed dialog - activity: %@ - finished flag: %d", activityType, completed);
}];

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

Answer 3:

与iOS 8 completionHandler已过时 ，所以你要提供替代completionWithItemsHandler 。 它还允许处理是否扩展修改后的数据设置（比如照片扩展名）。 见文档

    UIActivityViewController *activityViewController = [[UIActivityViewController alloc] initWithActivityItems:@[text, URL, image] applicationActivities:nil];
    activityViewController.excludedActivityTypes = @[UIActivityTypePrint, UIActivityTypeCopyToPasteboard, UIActivityTypeAssignToContact, UIActivityTypeAirDrop, UIActivityTypeAddToReadingList];

    // check if new API supported
    if ([activityViewController respondsToSelector:@selector(completionWithItemsHandler)]) {
        activityViewController.completionWithItemsHandler = ^(NSString *activityType, BOOL completed, NSArray *returnedItems, NSError *activityError) {
            // When completed flag is YES, user performed specific activity
        };
    } else {
        activityViewController.completionHandler = ^(NSString *activityType, BOOL completed) {
            // When completed flag is YES, user performed specific activity
        };
    }

Answer 4:

斯威夫特5：

func showShareOf(url: URL, title: String) {
    let shareItems: [Any] = ["\(title)\n", url]
    let activityVC = UIActivityViewController(activityItems: shareItems, applicationActivities: nil)
    activityVC.completionWithItemsHandler = doneSharingHandler
    self.present(activityVC, animated: true, completion: nil)
}

@objc func doneSharingHandler(activityType: UIActivity.ActivityType?, completed: Bool, _ returnedItems: [Any]?, error: Error?) {
    if (!completed) { return }
    // If here, log which activity occurred
    print("Shared activity: \(activityType)")
}

Answer 5:

对于斯威夫特，这个工作对我来说...

    // Configure UIActivityViewController
    let activityViewController = UIActivityViewController(activityItems: objectsToShare, applicationActivities: nil)
    activityViewController.excludedActivityTypes = [UIActivityTypeAirDrop,
        UIActivityTypeAddToReadingList,
        UIActivityTypeAssignToContact,
        UIActivityTypePrint,
        UIActivityTypeCopyToPasteboard]

    // Show UIActivityViewController
    presentViewController(activityViewController, animated: true, completion: nil)

    // Define completion handler
    activityViewController.completionWithItemsHandler = doneSharingHandler

...

func doneSharingHandler(activityType: String!, completed: Bool, returnedItems: [AnyObject]!, error: NSError!) {

    // Return if cancelled
    if (!completed) {
        return
    }
    // If here, log which activity occurred
    println("Shared video activity: \(activityType)")
}

文章来源: UIActivityViewControllerCompletionHandler How to?