StackOverflow2013

Note that there are some explanatory texts on larger screens.

plurals

POLooking for an alternative to touchesMoved to detect any touch event within a defined area?
text
Body
copied!<p>I have a virtual keyboard in my app with 6 keys, and the whole thing is just an image implemented with <code>UIImageView</code>. I determined the exact x and y coordinates that correspond to the image of each 'key' and used the following code to respond to a user interacting with the keyboard:</p> <pre><code>- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event { UITouch * touch = [[event allTouches] anyObject]; CGPoint point = [touch locationInView:touch.view]; if(point.y < 333 && point.y > 166 && point.x < 72 && point.x > 65) { NSLog(@"Key pressed"); } //Repeat per key... } </code></pre> <p>However, I have realized that this method is not very smart, because changing phone perspectives (portrait to landscape) or changing devices will ruin my x and y coordinates and therefore cause problems.</p> <p>So, I am looking for an alternative to specifying the absolute x and y values, and using touchesMoved in general. Ideally, it would be a button with specific settings that would call its method if it was tapped, or if the user dragged their finger into the area of the button (even if very slowly - I used swipe detection before and it required too much of an exaggerated movement). </p> <p>Is it possible to set up a button to call its method if tapped or if a touch event started outside of the button and then proceded into the button? If not, what are my alternatives?</p> <p>Thanks SE!</p>

Querying!

Guidance

An individual column

Larger individual text columns get their own page to allow for proper reading.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload