Draw a irregular polygon on iphone

Question

i have this question: i have a array of points and i would draw a irregular polygon by this points with Quartz or similar. Can you suggest me the best way to make this?

MyTest drawRect is this:

- (void)drawRect:(CGRect)rect
{
    CGContextRef ctx = UIGraphicsGetCurrentContext();
    CGContextClearRect(ctx, rect);

    CGContextSetRGBStrokeColor(ctx, 255, 0, 255, 1);
    CGPoint points[6] = { CGPointMake(100, 200), CGPointMake(150, 250),
        CGPointMake(150, 250), CGPointMake(50, 250),
        CGPointMake(50, 250), CGPointMake(100, 200) };
    CGContextStrokeLineSegments(ctx, points, 6);
}

Can you show us the code you have written so far? – Ashley Mills Mar 21 '12 at 09:44 — Ashley Mills, Mar 21 '12 at 09:44

score 3 · Accepted Answer · answered Mar 21 '12 at 09:51

3

You can use UIBezierPath / NSBezierPath:

UIBezierPath *poly = [[UIBezierPath alloc] init];
[poly moveToPoint:CGPointMake(0.0, 0.0)];
[poly addLineToPoint:CGPointMake(1.0, 0.0)];
[poly addLineToPoint:CGPointMake(1.0, 1.0)];
[poly closePath];
[poly stroke]; // draw stroke
[poly release];

answered Mar 21 '12 at 09:51

jacekmigacz

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How can I change the line color? Can you get me the way differences with my drawRect example? – Safari Mar 21 '12 at 10:10
1

[[UIcolor redColor] setStroke]; – jacekmigacz Mar 21 '12 at 10:18

Draw a irregular polygon on iphone

1 Answers1