如果用户按下取消，UIActivityViewController完成处理程序仍会调用操作 [英] UIActivityViewController completion handler still calls action if user presses cancel

问题描述

在我的UIActivityViewController中，我使用完成处理程序来执行成功共享通知。它有效，但我唯一的问题是，如果用户按下取消，它仍会显示通知。

In my UIActivityViewController, I use completion handler to execute a "successfully shared" notification. It works but my only problem is, it still shows the notification if the user presses cancel.

这是我的完成处理程序代码，

Here is my completion handler code,

[controller setCompletionHandler:^(NSString *activityType, BOOL completed) {


    CWStatusBarNotification *notification = [CWStatusBarNotification new];
    [notification displayNotificationWithMessage:@"✓ Successfully Shared Centre!"
                                          forDuration:3.0f];

    notification.notificationLabelBackgroundColor = [UIColor colorWithRed:38.0f/255.0f green:81.0f/255.0f blue:123.0f/255.0f alpha:1.0f];
    notification.notificationLabelTextColor = [UIColor whiteColor];



}];

感谢您的帮助！

推荐答案

这就是完成参数的用途：

[controller setCompletionHandler:^(NSString *activityType, BOOL completed) {
    if (!completed) return;

    CWStatusBarNotification *notification = [CWStatusBarNotification new];
    [notification displayNotificationWithMessage:@"✓ Successfully Shared Centre!"
                                     forDuration:3.0f];

    notification.notificationLabelBackgroundColor = [UIColor colorWithRed:38.0f/255.0f green:81.0f/255.0f blue:123.0f/255.0f alpha:1.0f];
    notification.notificationLabelTextColor = [UIColor whiteColor];
}];

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