UIActivityViewController - 有没有办法知道选择了哪个事件？

Question

我希望能够跟踪用户是否通过 facebook、twitter 等共享，但似乎无法知道选择了哪种方法。有没有？

Answer 1

您可以在 setCompletionHandler 中使用事件类型

UIActivityViewController *activityVC = [[UIActivityViewController alloc]initWithActivityItems:activityItems applicationActivities:nil];

[activityVC setCompletionHandler:^(NSString *activityType, BOOL completed) {
    if([activityType isEqualToString: UIActivityTypeMail]){
        NSLog(@"Mail");
    }
    if([activityType isEqualToString: UIActivityTypePostToFacebook]){
        NSLog(@"Facebook");
    }

}];
[self presentViewController:activityVC animated:TRUE completion:nil];

系统内置支持的内置事件类型。

NSString *const UIActivityTypePostToFacebook;

NSString *const UIActivityTypePostToTwitter;

NSString *const UIActivityTypePostToWeibo;

NSString *const UIActivityTypeMessage;

NSString *const UIActivityTypeMail;

NSString *const UIActivityTypePrint;

NSString *const UIActivityTypeCopyToPasteboard;

NSString *const UIActivityTypeAssignToContact;

NSString *const UIActivityTypeSaveToCameraRoll;

针对 iOS 8 进行了编辑

请注意，这会在 iOS 8 中生成编译器警告，您需要使用 setCompletionWithItemsHandler 方法而不是 setCompletionHandler 方法。

替换:

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

与:

[activityVC setCompletionWithItemsHandler:^(NSString *activityType, BOOL completed,  NSArray *returnedItems, NSError *activityError) {