How to swap views using a swipe gesture XCode

Question

I am using XCode to develop a Cocoa touch application for the iOS platform but have had trouble finding out how to get a swipe gesture implemented that would allow the user to s

Answer 1

Lets assume you want to swipe left to bring up another view from the right.

In the storyboard, drag and drop a swipe gesture recognizer. It will make an icon below the view controller; drag this icon and drop onto the ViewController you want to navigate to. This will add a segue, select custom segue. Then create a UIStoryboardSegue class. Add the following code:

- (void)perform {
    UIViewController* source = (UIViewController *)self.sourceViewController;
    UIViewController* destination = (UIViewController *)self.destinationViewController;

    CGRect sourceFrame = source.view.frame;
    sourceFrame.origin.x = -sourceFrame.size.width;

    CGRect destFrame = destination.view.frame;
    destFrame.origin.x = destination.view.frame.size.width;
    destination.view.frame = destFrame;

    destFrame.origin.x = 0;

    [source.view.superview addSubview:destination.view];

    [UIView animateWithDuration:0.5
                     animations:^{
                         source.view.frame = sourceFrame;
                         destination.view.frame = destFrame;
                     }
                     completion:^(BOOL finished) {
                         UIWindow *window = source.view.window;
                         [window setRootViewController:destination];
                     }];
}

Answer 2

This sounds like a perfect time to use UIGestureRecognizer or, more specifically, UISwipeGestureRecognizer.

For more info on how to use them, read up in the Gesture Recognizers section of the Event Handling Guide.