UIActivityViewController - 在發送與取消

目前我使用下面的代碼實例化一個UIActivityViewController檢測錯誤：UIActivityViewController - 在發送與取消

NSArray *itemsToShare = [[NSArray alloc] initWithObjects:bodyMessage, nil]; 
     UIActivityViewController *activityVC = [[UIActivityViewController alloc] initWithActivityItems:itemsToShare applicationActivities:nil]; 
     activityVC.excludedActivityTypes = [[NSArray alloc] initWithObjects: UIActivityTypePrint, UIActivityTypeCopyToPasteboard, UIActivityTypeAssignToContact, UIActivityTypeSaveToCameraRoll, UIActivityTypePostToWeibo,UIActivityTypePostToFacebook,UIActivityTypePostToTwitter, nil]; 
     [activityVC setValue:subject forKey:@"subject"]; 
     [self presentViewController:activityVC animated:YES completion:nil]; 


     [activityVC setCompletionHandler:^(NSString *activityType, BOOL done) 
     { 

      NSString *ServiceType; 
      if ([activityType isEqualToString:UIActivityTypeMail])   ServiceType = @"Mail."; 
      if ([activityType isEqualToString:UIActivityTypeMessage]) ServiceType = @"Messenger."; 

      NSMutableString *shareWithActivityResultMessage; 
      NSString *alertTitle; 
      if (done) 
      { 
       alertTitle = @"Success!"; 

       shareWithActivityResultMessage = [NSMutableString stringWithString:successMessage]; 
       [shareWithActivityResultMessage appendString:ServiceType]; 
      } 
      else 
      { 
       // didn't succeed. 
       alertTitle = @"Error"; 
       shareWithActivityResultMessage = [NSMutableString stringWithString:errorMessage]; 
      }

當我取消作曲，在ActivityVC done = false，因此錯誤信息被觸發。有沒有辦法檢測取消，而不是發送消息中的實際錯誤？

來源

2013-08-03 Apollo

該文檔明確指出，即使用戶取消完成處理程序被調用。在這種情況下，「完成」將是「否」。這並不表示有錯誤。你不應該因爲'done'是'NO'而顯示錯誤提示。事實上，'UIActivityViewController'不會給出任何類型的錯誤。 – rmaddy

您可以使用新的UIActivityViewControllerCompletionWithItemsHandler類型的iOS 8：

activityVC.completionWithItemsHandler = ^(NSString *activityType, BOOL completed, NSArray *returnedItems, NSError *activityError){ 
    ... 
}

只需選中activityError財產

來源

2014-12-09 03:53:22 zeroimpl

UIActivityViewController - 在發送與取消

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