11. Using Touch Gestures

The wheel view you built in the last chapter looks nice, especially when you use the photo wheel view cell. And the transitions between wheel and carousel are smooth thanks to Core Animation. But there’s still something missing. The user cannot interact with the photo wheel. That changes in this chapter, as you learn about touch handling and gesture recognizers.

Touch Gestures Explained

Prior to iOS, most touch interfaces on mobile devices simply replaced the mouse with a finger. Users used a finger to move the mouse cursor around the screen, tapped to simulate a mouse click, and double-tapped to simulate a double click. Needless to say, this was a less than ideal user experience. Mouse-driven operating systems expect ...

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