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2014/10/15 ¤U¤È 10:13:12
iphone Programming Glossary: recognizer'sUIImageView Gestures (Zoom, Rotate) Question http://stackoverflow.com/questions/3448614/uiimageview-gestures-zoom-rotate-question setDelegate self piece addGestureRecognizer pinchGesture pinchGesture release Rotate method Reset the gesture recognizer's rotation to 0 after applying so the next callback is a delta from the current rotation void rotatePiece UIRotationGestureRecognizer.. view transform gestureRecognizer rotation gestureRecognizer setRotation 0 Scale Method at the end reset the gesture recognizer's scale to 1 after applying so the next callback is a delta from the current scale void scalePiece UIPinchGestureRecognizer.. return YES Scale and rotation transforms are applied relative to the layer's anchor point this method moves a gesture recognizer's view's anchor point between the user's fingers void adjustAnchorPointForGestureRecognizer UIGestureRecognizer gestureRecognizer..
How to have a UISwipeGestureRecognizer AND UIPanGestureRecognizer work on the same view http://stackoverflow.com/questions/5111828/how-to-have-a-uiswipegesturerecognizer-and-uipangesturerecognizer-work-on-the-sa
Limit maximum scale for scaling image with pinch gesture in IOS http://stackoverflow.com/questions/5647084/limit-maximum-scale-for-scaling-image-with-pinch-gesture-in-ios the method and scale your image correspondingly for each small increment you will get a smooth animation. You use the recognizer's scale property to modify your image. Then you reset the property to 1.0 so that the next time the selector method is called.. since the last one. You again re scale your image by the new small increment and reset to 1.0. If you do not reset the recognizer's scale and use it to re scale your image you will be scaling your image by the cumulative change resulting in jumpy behavior.. the cumulative change resulting in jumpy behavior and incorrect scaling. So do make sure to be resetting the gesture recognizer's scale to 1. To keep track of the total change in scale you can create an instance variable possibly also called 'scale'..
Detect when UIGestureRecognizer is up, down, left and right Cocos2d http://stackoverflow.com/questions/7420078/detect-when-uigesturerecognizer-is-up-down-left-and-right-cocos2d is to add one UISwipeGestureRecognizer for each direction you want the swipe gesture to be recognized and set each recognizer's direction accordingly to either up down left and right. If you want to test for a swipe in any direction you'll have to..
iOS Pinch Scale and Two Finger Rotate at same time http://stackoverflow.com/questions/8108768/ios-pinch-scale-and-two-finger-rotate-at-same-time touch share improve this question Every time pinch is called you just compute the transform based on the pinch recognizer's scale. Every time pinchRotate is called you just compute the transform based on the rotation recognizer's rotation. You.. on the pinch recognizer's scale. Every time pinchRotate is called you just compute the transform based on the rotation recognizer's rotation. You never combine the scale and the rotation into one transform. Here's an approach. Give yourself one new instance..
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