Open Keyboard's settings screen in iOS's settings app programmatically from another app

Question

How can we go directly to any of the below mentioned screens of iOS\'s settings app programmatically

Answer 1

As of iOS 10 "App-Prefs:root" should be used rather than "prefs:root". See below Objective C code. Tested this , code works fine but Apple may reject the app because of this.
Note : As pointed out this will work only on ios 10

 NSString *settingsUrl= @"App-Prefs:root=General&path=Keyboard";

 if ([[UIApplication sharedApplication] respondsToSelector:@selector(openURL:options:completionHandler:)]) {

    [[UIApplication sharedApplication] openURL:[NSURL URLWithString:settingsUrl] options:@{} completionHandler:^(BOOL success) {
    NSLog(@"URL opened");
    }];
}