如何检测已选择的活动以及如何检查邮件是否已发送？

Question

我已经有了从app上简单分享一些消息的代码。

UIActivityViewController *activityViewController = [[UIActivityViewController alloc]
                                                    initWithActivityItems:@[message]
                                                    applicationActivities:nil];

activityViewController.excludedActivityTypes = @[UIActivityTypeAssignToContact, UIActivityTypeSaveToCameraRoll];
[self presentViewController:activityViewController animated:YES completion:nil];

问题：

1. 可以检测选择了哪个共享选项？
2. 可以检测邮件是否已被共享或取消？

提前谢谢。

Answer 1

以下是如何使用UIActivityViewControllerCompletionHandler的示例：

UIActivityViewController *activityViewController = [[UIActivityViewController alloc]
                                                    initWithActivityItems:@[@"abc", someImage]
                                                    applicationActivities:nil];

[activityViewController setCompletionHandler:^(NSString *activityType, BOOL completed) {
    NSLog(@"%@, %d", activityType, completed);
}];

activityViewController.excludedActivityTypes = @[UIActivityTypeAssignToContact, UIActivityTypeSaveToCameraRoll];
[self presentViewController:activityViewController animated:YES completion:nil];

Answer 2

您需要实施UIActivityViewControllerCompletionHandler，您可以在其中查看用户做了什么或是否取消了。

Answer 3

在iOS8中，不推荐使用completionHandler属性。请改用completionWithItemsHandler属性：

activityViewController.completionWithItemsHandler = ^(NSString *activityType, BOOL completed, NSArray *returnedItems, NSError *activityError) {
NSLog(@"completed    = '%@'", (completed) ? @"YES" : @"NO");
NSLog(@"activityType = '%@'", activityType);
};