#import "MyView.h"
@interface MyView ()
{
CGMutablePathRef pathRef;
}
@end
@implementation MyView
-(id)initWithCoder:(NSCoder *)aDecoder
{
if (self=[super initWithCoder:aDecoder])
{
pathRef=CGPathCreateMutable();
}
return self;
}
-(void)drawRect:(CGRect)rect
{
CGContextRef contextRef=UIGraphicsGetCurrentContext();
CGContextAddPath(contextRef, pathRef);
CGContextStrokePath(contextRef);
}
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
CGPoint p=[touches.anyObject locationInView:self];
CGPathMoveToPoint(pathRef, nil, p.x, p.y);
}
-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
CGPoint p=[touches.anyObject locationInView:self];
CGPathAddLineToPoint(pathRef, nil, p.x, p.y);
[self setNeedsDisplay];
}
@end
