![]() ![]() You can tap Full Test at the Hardware screen to perform all available diagnostics. Run a test by tapping the icon for the feature you want to run. There are no built-in gestures you can watch for to speak of, but there are built-in gestures that the system handles, like swiping across a row in a table to delete it, and pinch-zooming on a UIScrollView. Select Hardware test to run diagnostics on the display, backlight, touch screen, multi-touch capability, flash, front and rear camera, and the proximity sensor. The touchesCancelled method is mostly used to support the UIScrollView which allows you to tap something inside a scroll view, then drag the scroll view itself rather that interact with the subview, if certain criteria are met (the scroll view would send a touches cancelled message to the subview when it starts scrolling). Similarily obvious actions occur when a finger moves or is removed from the screen. To retrieve all touches currently on the screen, retrieve event.allTouches. When you tap down, touchesBegan is called with the set of touches that just began. (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event The maximum number of touches will be shown even after you remove your fingers. It doesn't matter if your fingers prevent you from seeing the taps and numbers on the screen. ![]() ![]() You can always take a look at the documentation to get a better idea of what is supported, but the general methods to implement are: - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event The Multi-touch test detects multiple touches and highlights each with a different color. ![]()
0 Comments
Leave a Reply. |