iOS

1. 把要分享的内容放入一个Array中

NSMutableArray *activityItems = [NSMutableArray array];
UIImage *imageItem = [UIImage imageNamed:@"YOUR_IMAGE"];
NSString *textItem = @"YOUR_TEXT";
NSURL *urlItem = [NSURL URLWithString:@"YOUR_URL"];

[activityItems addObject:imageItem];
[activityItems addObject:textItem];
[activityItems addObject:urlItem];

2. 使用这个Array初始化UIActivityViewController，并显示分享页面

UIActivityViewController *activityViewController = [[UIActivityViewController alloc] initWithActivityItems:activityItems applicationActivities:nil];
UIActivityViewControllerCompletionHandler activityBlock = ^(NSString *activityType, BOOL completed) {
　　[activityViewController dismissViewControllerAnimated:YES completion:nil];
};
activityViewController.completionHandler = activityBlock;
[self presentViewController:activityViewController animated:YES completion:nil];

OK.

分享页面包含的APP会根据你所分享的内容的数据类型，自动显示（有些APP要在分享界面的"More"按钮里手动开启）。

如果要限制分享页面上显示的APP，可在present activityViewController之前再给它赋一个excludedActivityTypes属性值

NSArray *excludeActivities = @[UIActivityTypeAirDrop,
                               UIActivityTypePrint,
                               UIActivityTypeAssignToContact,
                               UIActivityTypeSaveToCameraRoll,
                               UIActivityTypeAddToReadingList,
                               UIActivityTypePostToFlickr,
                               UIActivityTypePostToVimeo];
 
activityViewController.excludedActivityTypes = excludeActivities;

参考（需FQ）：http://www.codingexplorer.com/add-sharing-to-your-app-via-uiactivityviewcontroller/