iOS Drawing: Practical UIKit Solutions (Jason Arnold's Library) by Erica Sadun

Author:Erica Sadun
Language: eng
Format: epub
Publisher: Addison-Wesley Professional
Published: 2014-03-14T16:00:00+00:00

// Offset by size

CGSize size =

[[string substringWithRange: NSMakeRange(i, 1)]

sizeWithAttributes:@{NSFontAttributeName:font}];

OffsetPath(path, CGSizeMake(-size.width, 0));

}

// Clean up

free(glyphs); CFRelease(fontRef);

// Return the path to the UIKit coordinate system

MirrorPathVertically(path);

return path;

}

* * *

Adding Dashes

UIKit makes it easy to add dashes to a Bezier path. For example, you might add a simple repeating pattern, like this:

Click here to view code image

CGFloat dashes[] = {6, 2};

[path setLineDash:dashes count:2 phase:0];

The array specifies, in points, the on/off patterns used when drawing a stroke. This example draws lines of 6 points followed by spaces of 2 points. Your dash patterns will naturally vary by the scale of the drawing context and any compression used by the view. That said, there are many ways to approach dashes. Table 4-1 showcases some basic options.

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