如何在ios中的UIactivity视图控制器中只显示facebook，twitter和电子邮件(目标c)？

// 导入相关的框架
#import <UIKit/UIKit.h>
#import <Social/Social.h>

@interface ViewController : UIViewController

@end

@implementation ViewController

- (IBAction)shareButtonTapped:(id)sender {
    // 创建要分享的内容
    NSString *textToShare = @"这是要分享的文本";
    UIImage *imageToShare = [UIImage imageNamed:@"image.png"];
    NSURL *urlToShare = [NSURL URLWithString:@"https://www.example.com"];
    NSArray *activityItems = @[textToShare, imageToShare, urlToShare];
    
    // 创建自定义的UIActivityViewController
    UIActivityViewController *activityViewController = [[UIActivityViewController alloc] initWithActivityItems:activityItems applicationActivities:nil];
    
    // 设置要显示的分享平台
    NSArray *excludeActivities = @[UIActivityTypePostToWeibo, UIActivityTypeMessage, UIActivityTypeMail, UIActivityTypePrint, UIActivityTypeCopyToPasteboard, UIActivityTypeAssignToContact, UIActivityTypeSaveToCameraRoll, UIActivityTypeAddToReadingList, UIActivityTypePostToFlickr, UIActivityTypePostToVimeo, UIActivityTypePostToTencentWeibo, UIActivityTypeAirDrop, UIActivityTypeOpenInIBooks];
    activityViewController.excludedActivityTypes = excludeActivities;
    
    // 显示分享界面
    [self presentViewController:activityViewController animated:YES completion:nil];
}

@end