ios - UIActivityViewController 中各个 Activity 事件的不同 Activity 项目

Question

是否可以为UIActivityViewController中的每个事件使用不同的事件项？例如，我有以下代码:

NSArray *objectsToShare = @[schemeURL, wordedString];
controller = [[UIActivityViewController alloc] initWithActivityItems:objectsToShare applicationActivities:nil];

// Exclude all activities except AirDrop.
NSArray *excludedActivities = @[UIActivityTypePostToTwitter,
                                    UIActivityTypePostToWeibo,
                                    UIActivityTypeAssignToContact, UIActivityTypeSaveToCameraRoll,
                                    UIActivityTypeAddToReadingList, UIActivityTypePostToFlickr,
                                    UIActivityTypePostToVimeo, UIActivityTypePostToTencentWeibo];
controller.excludedActivityTypes = excludedActivities;
[self presentViewController:controller animated:YES completion:nil];

我想将要发送到 Facebook 的数据设置为 wordedString 属性，并将通过 AirDrop 发送的数据设置为 schemeURL 属性。这可能吗？提前致谢。

Answer 1

您可以子类化 UIActivityItemProvider，并且可以使用以下方法来检查事件类型..尝试一下

//- Returns the data object to be acted upon. (required)
- (id)activityViewController:(UIActivityViewController *)activityViewController itemForActivityType:(NSString *)activityType
{
if ([activityType isEqualToString:UIActivityTypePostToFacebook]) {
    NSString *theText = @"Some text for Facebook";
    return theText;
}

if ([activityType isEqualToString:UIActivityTypePostToTwitter]) {
    NSString *theText = @"Some text for Twitter";
    return theText;
}

if ([activityType isEqualToString:UIActivityTypePostToWeibo]) {
    NSString *theText = @"Some text for Weibo";
    return theText;
}

if ([activityType isEqualToString:UIActivityTypeMail]) {
    NSString *theText = _someText;
    return theText;
}

if ([activityType isEqualToString:kYourCustomMailType]) {
    NSString *theText = @"Some text for your Custom Type";
    return theText;
    }

return @"Some default text";

}