Login Through Instagram App instead of Safari
<p>I need to integrate Instagram login in my app. So I am redirecting to safari in my application to login in Instagram. but what i have to do is, if user have Insta app installed and he/she is already logged in there then the login screen should not come he can directly go to authentication approval. </p>

<p>my Login code is,</p>

<pre><code>- (NSURLRequest *) loginRequest {

    NSString * urlString = [NSString stringWithFormat:@"https://instagram.com/oauth/authorize/?client_id=%@&amp;redirect_uri=%@&amp;response_type=token", self.clientID, self.redirectURI];

    NSURL * url = [NSURL URLWithString:urlString];
    return [NSURLRequest requestWithURL:url];
}
</code></pre>

<p>I went through too many questions here but didn't got the answer. its not feasible or what , i am totally confused .</p>