2014/10/15 下午 10:09:33

iphone Programming Glossary: gesturestartpoint

http://stackoverflow.com/questions/2042930/successful-swipe-in-uitextview

UIKit.h #define kMinimumGestureLength 25 #define kMaximumVariance 5 @interface SwipeableTextView UITextView CGPoint gestureStartPoint @end @implementation SwipeableTextView void touchesBegan NSSet touches withEvent UIEvent event super touchesBegan touches.. NSSet touches withEvent UIEvent event super touchesBegan touches withEvent event UITouch touch touches anyObject gestureStartPoint touch locationInView self void touchesMoved NSSet touches withEvent UIEvent event super touchesMoved touches withEvent event.. withEvent event UITouch touch touches anyObject CGPoint currentPosition touch locationInView self CGFloat deltaX fabsf gestureStartPoint.x currentPosition.x CGFloat deltaY fabsf gestureStartPoint.y currentPosition.y if deltaX kMinimumGestureLength deltaY kMaximumVariance..

Calculate angle for rotation in Pie Chart

http://stackoverflow.com/questions/5102942/calculate-angle-for-rotation-in-pie-chart

using the below code void touchesMoved NSSet touches withEvent UIEvent event NSArray allTouches touches allObjects gestureStartPoint gestureMovedPoint i am getting the gestureStartPoint on touch began event gestureMovedPoint allTouches objectAtIndex 0 locationInView.. withEvent UIEvent event NSArray allTouches touches allObjects gestureStartPoint gestureMovedPoint i am getting the gestureStartPoint on touch began event gestureMovedPoint allTouches objectAtIndex 0 locationInView self superview NSLog @ gestureMovedPoint.. NSLog @ gestureMovedPoint @ NSStringFromCGPoint gestureMovedPoint CGFloat previousAngle self angleBetweenPoints gestureStartPoint second11 gestureMovedPoint atan2 gestureMovedPoint.y gestureStartPoint.y gestureMovedPoint.x gestureStartPoint.x 180 M_PI..

Detect touch on subview

http://stackoverflow.com/questions/6490257/detect-touch-on-subview

NSSet touches withEvent UIEvent event NSArray allTouches touches allObjects for UITouch touch in allTouches gestureStartPoint touch locationInView self.view if touch view controlUIImageview NSLog @ TOUCH DETECT How do I write this part if I have..

Drawing on the iPhone in objective c [closed]

http://stackoverflow.com/questions/7397567/drawing-on-the-iphone-in-objective-c

these lines of code in tat... void touchesBegan NSSet touches withEvent UIEvent event UITouch touch touches anyObject gestureStartPoint touch locationInView self currentPath moveToPoint gestureStartPoint void touchesMoved NSSet touches withEvent UIEvent event.. UIEvent event UITouch touch touches anyObject gestureStartPoint touch locationInView self currentPath moveToPoint gestureStartPoint void touchesMoved NSSet touches withEvent UIEvent event UITouch touch touches anyObject currentPosition touch locationInView.. set currentPath strokeWithBlendMode kCGBlendModeNormal alpha 1.0 in the header file declare the following..... CGPoint gestureStartPoint currentPosition UIBezierPath currentPath and declare a property... @property nonatomic retain UIBezierPath currentPath in..