objective c - How to get UIViewController of a UIView's superview in iOS?

Question

I have a UIViewController in which I have a UITextView added from interface builder. Now I want to push a view when I click on hyperlink or phone number. I am able to detect that which url is clicked using a method I found in stackoverflow. Here is the method

@interface UITextView (Override)
@end

@class WebView, WebFrame;
@protocol WebPolicyDecisionListener;

@implementation UITextView (Override)

- (void)webView:(WebView *)webView decidePolicyForNavigationAction:(NSDictionary *)actionInformation request:(NSURLRequest *)request frame:(WebFrame *)frame decisionListener:(id < WebPolicyDecisionListener >)listener
{
    NSLog(@"request: %@", request);
}
@end

Now I want to get the viewController of the textview's superview so that I can push another viewController when I click on URL/Phone Number.

Answer 1

You can't access it directly, but you can find the next view controller (if any) by traversing the responder chain.

This is how the Three20 framework does it:

- (UIViewController*)viewController
{
    for (UIView* next = [self superview]; next; next = next.superview)
    {
        UIResponder* nextResponder = [next nextResponder];

        if ([nextResponder isKindOfClass:[UIViewController class]])
        {
            return (UIViewController*)nextResponder;
        }
    }

    return nil;
}