I am creating a semi-piano app in Objective-C for iPhone; it's in fact a diffrent layout MIDI Controller, but I'm still working on the design.
I created all of the "keys" with UIButtons, and I want to be able to slide to them or from them to other UIButtons.
I read all the similar questions before, but I couldn't make it to work with touchesMoved, Because it only worked from the view if I didn't drag the finger from a UIButton.
Thanks in advance, code will be appreciated!
Are your buttons created in IB? The default event when connecting buttons in IB is "touch up inside", which means the action is fired when the user ends a touch (lifts the finger) inside the button. A piano key or similar would be more appropriate to fire on the "touch down inside" (for the initial press) and the "touch drag enter" (for when a finger that is already on the screen moves into the button).
Since you are doing it programmatically, you can add targets to the buttons as described here:
http://developer.apple.com/library/ios/documentation/uikit/reference/UIControl_Class/Reference/Reference.html#//apple_ref/occ/instm/UIControl/addTarget:action:forControlEvents:
Just include the events you want in the mask.
