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2014/10/15 ¤U¤È 10:07:32

iphone Programming Glossary: dragdrop

How To Draw line on touch event?

http://stackoverflow.com/questions/4669490/how-to-draw-line-on-touch-event

in touch event but not work... My app Log file look like... x 0 y 1079934976 At Touch Move Thu Jan 13 11 20 05 .local DragDrop 536 CGContextAddLineToPoint invalid context 0x0 2011 01 13 11 20 05.149 DragDrop 536 207 x 0 y 1079902208 Thu Jan 13 11.. Touch Move Thu Jan 13 11 20 05 .local DragDrop 536 CGContextAddLineToPoint invalid context 0x0 2011 01 13 11 20 05.149 DragDrop 536 207 x 0 y 1079902208 Thu Jan 13 11 20 05 .local DragDrop 536 CGContextSetRGBStrokeColor invalid context 0x0 Thu Jan.. invalid context 0x0 2011 01 13 11 20 05.149 DragDrop 536 207 x 0 y 1079902208 Thu Jan 13 11 20 05 .local DragDrop 536 CGContextSetRGBStrokeColor invalid context 0x0 Thu Jan 13 11 20 05 .local DragDrop 536 CGContextDrawPath invalid context..