ios - 使用UIActivityViewController是否可以为不同的社交媒体包含不同的内容？

Question

我正在使用ios 7的MobileCoreServices将内容从应用程序发布到社交媒体。 。这是我的代码..

NSArray *activityItems;

NSString *title =  _titleLabel.text;

if (_imageLabel.image != nil) {
    activityItems = @[title, _imageLabel.image];
} else {
    activityItems = @[title];
}

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

[self presentViewController:activityController

    animated:YES completion:nil];

现在，它发送普通文本。我希望为Facebook和Twitter发布不同的标题。可能吗？

Answer 1

您需要子类化UIActivityItemProvider

@interface APCustomActivityProvider : UIActivityItemProvider <UIActivityItemSource>
@end

将以下内容添加到您的实现文件中

@implementation APCustomActivityProvider
- (id) activityViewController:(UIActivityViewController *)activityViewController
  itemForActivityType:(NSString *)activityType
{
  if ( [activityType isEqualToString:UIActivityTypePostToTwitter] ){
    NSString *title = @"Twitter title";
    return title;
  }
  if ( [activityType isEqualToString:UIActivityTypePostToFacebook] ) {
    NSString *title = @"Facebook title";
    return title;
  }
  return nil;
}

- (id) activityViewControllerPlaceholderItem:(UIActivityViewController*)activityViewController { return @""; }
@end

要使用自定义的ActivityProvider，请转到显示UIActivityViewController的位置

NSArray *activityItems;
APCustomActivityProvider *activityProvider = [[APCustomActivityProvider alloc] init];
if (_imageLabel.image != nil) {
    activityItems = @[activityProvider, _imageLabel.image];
} else {
    activityItems = @[activityProvider];
}


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

[self presentViewController:activityController
                   animated:YES completion:nil];