问题
I need to rotate an image when the user do a two finger twist on it. do you have an idea on how i can code this or if you've done this before.
I think it would be a good idea to write a class that detect all the main gesture and provide iif.
回答1:
I found this example on the internet. It's very nicely written...
http://www.skylarcantu.com/blog/2009/08/08/multitouchsingletouchtap-handling/
回答2:
When you rotate your thumb and index clockwise what really happens is that:
- the thumb starts on the right
- descrives a
ushape underneath the index - finishes on the left
If you look at the full gesture it is .) rotated clockwise. In some cases, the index will move slightly south-east so you get /).
回答3:
I suggest looking into SDK 3.2 - it has extended support for gesture detection.
来源：https://stackoverflow.com/questions/2442964/iphone-two-fingers-twist-gesture