Ios 检测UIActivityViewController的解除

我需要呈现一个视图，在UIActivityViewController移动到父VC之后

...
UIActivityViewController *avvc = [[UIActivityViewController alloc] initWithActivityItems:shareItems applicationActivities:nil];
[self presentViewController:avvc animated:YES completion:nil];

---

希望这对您有所帮助。

Swift 3版

avvc.completionWithItemsHandler = { (activityType, completed:Bool, returnedItems:[Any]?, error: Error?) in
   if completed {
      // Do something 
   }
}

Xamarin/C#

---

我只想澄清一下，布尔值

completed

表示单个

UIActivity

的完成状态。如果

UIActivityViewController

在没有任何操作的情况下被解除，则

activityType

的值将为

nil

，而completed的值将为

false

[avvc setCompletionWithItemsHandler:^(UIActivityType _Nullable activityType, BOOL completed,
                                      NSArray * _Nullable returnedItems,
                                      NSError * _Nullable activityError) {

    if (activityType == nil)    {
        NSLog(@"UIActivityViewController dismissed without any action.");
    } else {
        NSLog(@"completionWithItemsHandler, activityType: %@, completed: %d, returnedItems: %@, activityError: %@",
         activityType, completed, returnedItems, activityError);
    }
}];

---

布尔值

completed

表示单个

UIActivity

的完成状态。如果

UIActivityViewController

在不执行任何操作的情况下被解除，则

activityType

的值将为零，completed的值将为

false

。在OP的场景中，如果视图控制器取消共享活动，则视图控制器不会被解除。此答案现在已被弃用，使用下面的@Bijoy Thangaraj答案。更重要的是，每次操作完成时都会调用此完成，而不仅仅是在取消操作时

avvc.CompletionWithItemsHandler = MyCompletionWithItemsHandler;

// ...

void MyCompletionWithItemsHandler(NSString activityType, bool completed, NSExtensionItem[] returnedItems, NSError error)
{
    if (completed)
    {
        // Did not tap Cancel
    } 
    else
    {
        // Cancel was tapped
    }
}

[avvc setCompletionWithItemsHandler:^(UIActivityType _Nullable activityType, BOOL completed,
                                      NSArray * _Nullable returnedItems,
                                      NSError * _Nullable activityError) {

    if (activityType == nil)    {
        NSLog(@"UIActivityViewController dismissed without any action.");
    } else {
        NSLog(@"completionWithItemsHandler, activityType: %@, completed: %d, returnedItems: %@, activityError: %@",
         activityType, completed, returnedItems, activityError);
    }
}];