How can I open a Twitter tweet using the native Twitter app on iOS?

This is how you access other apps from your own. Just find the proper url to send for accessing status. I've included a list that should have most of the important ones. Including status finding.

[[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"twitter://status?id=12345"]];

twitter://user?screen_name=lorenb

twitter://user?id=12345

twitter://status?id=12345

twitter://timeline

twitter://mentions

twitter://messages

twitter://list?screen_name=lorenb&slug=abcd

twitter://post?message=hello%20world

twitter://post?message=hello%20world&in_reply_to_status_id=12345

twitter://search?query=%23hashtag

Note: It can be important to make sure the user has twitter installed or this will cause a crash. So I recommend adding this in an if statement before you try to send them to twitter.

[[UIApplication sharedApplication] canOpenURL:[NSURL URLWithString:@"twitter://"]];

I would go with below approach...

NSURL *twitterURL = [NSURL URLWithString:@"fb://profile/<profile_id>"];if ([[UIApplication sharedApplication] canOpenURL:twitterURL]) {    [[UIApplication sharedApplication] openURL:twitterURL];} else {    WebViewViewController *secondView = [self.storyboard instantiateViewControllerWithIdentifier:@"webinterface"];    secondView.headerLabel = @"Facebook";    secondView.webPath = @"https://www.facebook.com/pages/<link_for_page>";    [self.navigationController pushViewController:secondView animated:YES];}

in WebViewViewController I have webview and I am opening link there...

basically its like if you don't have Twitter on iPhone, it will open in WebView...

My apologies if this has already been answered, but the schema for posting a message with a hashtag is:

twitter://post?message=hello%20world%23thisisyourhashtag.  

Just replace thisisyourhashtag with the hashtag that you would like users to post.