I need to create an app for iPad, where the client can make a signature and i can get coordinates, acceleration and pressure of touch. For draw, coordinates and acceleration no problem. but i can't get pressure. I tried with CPBPressureTouchGestureRecognizer but I didn't solve. I could also use a pen and a sdk.
Someone can suggest something to me? Can i do all with finger or it's necessary a pen? What is cheaper pen and easier sdk to use?
iPad has no hardware capability of sensing the pressure. Unless it'd be some special stylus that sends the pressure info via BT to the iPad app - you're out of luck.
Also - you'd have to calculate acceleration yourself.