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2014/10/15 ¤U¤È 10:12:48
iphone Programming Glossary: point2.xhttp://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.. 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 if touches count 1 NSLog @ ^^^^^^^^^^^^^^^Tocuhes..
http://stackoverflow.com/questions/3956202/ipad-very-simple-drawing CGContextMoveToPoint UIGraphicsGetCurrentContext point1.x point1.y CGContextAddLineToPoint UIGraphicsGetCurrentContext point2.x point2.y CGContextStrokePath UIGraphicsGetCurrentContext CGContextFlush UIGraphicsGetCurrentContext drawImage.image UIGraphicsGetImageFromCurrentImageContext..
Using UIPinchGestureRecognizer to scale uiviews in single direction http://stackoverflow.com/questions/6759028/using-uipinchgesturerecognizer-to-scale-uiviews-in-single-direction Calculate distance CGPoint 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.. to calculate the distance yourViewHere . 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..
http://stackoverflow.com/questions/862084/move-a-uiimageview 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 pointPath CGPathRelease pointPath imageView.layer..
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