2014/10/15 下午 10:12:48

iphone Programming Glossary: point1.y

http://stackoverflow.com/questions/2135744/iphone-uiimageview-pinch-zoom

CGPoint point1 CGPoint point2 NSLog @ point1 x 5.2f point 2 x 5.2f point 1 y 5.2f point 2 y 5.2f point1.x point2.x point1.y point2.y return sqrt pow point1.x point2.x 2 pow point1.y point2.y 2 void touchesBegan NSSet touches withEvent UIEvent event.. 2 x 5.2f point 1 y 5.2f point 2 y 5.2f point1.x point2.x point1.y point2.y return sqrt pow point1.x point2.x 2 pow point1.y point2.y 2 void touchesBegan NSSet touches withEvent UIEvent event if touches count 1 NSLog @ ^^^^^^^^^^^^^^^Tocuhes began..

iPad (very) simple drawing

http://stackoverflow.com/questions/3956202/ipad-very-simple-drawing

UIGraphicsGetCurrentContext 0.0 0.0 0.0 1.0 CGContextMoveToPoint UIGraphicsGetCurrentContext point1.x point1.y CGContextAddLineToPoint UIGraphicsGetCurrentContext point2.x point2.y CGContextStrokePath UIGraphicsGetCurrentContext CGContextFlush..

Using UIPinchGestureRecognizer to scale uiviews in single direction

http://stackoverflow.com/questions/6759028/using-uipinchgesturerecognizer-to-scale-uiviews-in-single-direction

calculatePointDistancewithPoint1 CGPoint point1 andPoint2 CGPoint point2 return CGPointMake point2.x point1.x point2.y point1.y This is the log output when I try to pinch out zoom into of the view only moving my fingers in a vertical direction. The.. . EDIT CGPoint CGPointDistance CGPoint point1 CGPoint point2 return CGPointMake point2.x point1.x point2.y point1.y EDIT2 about the formula to calculate the scaling The idea is calculating the variation in the scale factor and apply it..

Move a UIImageView

http://stackoverflow.com/questions/862084/move-a-uiimageview

CGPathMoveToPoint pointPath NULL viewOrigin.x viewOrigin.y CGPathAddLineToPoint pointPath NULL point1.x point1.y CGPathAddLineToPoint pointPath NULL point2.x point2.y CGPathAddLineToPoint pointPath NULL point3.x point3.y pathAnimation.path..