uiview-hierarchical-drawing

This is a category on UIView, which directly calls drawRect hierarchically. This allows you to use any UIGraphicsContext, and in particular PDF contexts. The benefit: Beautiful, crystal clear rendering.

Usage

#import "UIView+HierarchicalDrawing.h"

CGSize pageSize = CGSizeMake(842.4,597.6);
NSMutableData *pdfData = [NSMutableData data];
UIGraphicsBeginPDFContextToData(pdfData, CGRectMake(0, 0, pageSize.width, pageSize.height), documentInfoDict);
UIGraphicsBeginPDFPage();
CGContextRef pdfContext = UIGraphicsGetCurrentContext();
CGContextSetInterpolationQuality(pdfContext, kCGInterpolationHigh);

[theView drawHierarchy];

UIGraphicsEndPDFContext();
// use pdfData

Example

Below are two examples of rendering into a PDF context. One uses UIView+HierarchicalDrawing with drawHierarchy, the other -[CALayer renderInContext:] with a contentScaleFactor of 2 on the view.

• Using UIView+HierarchicalDrawing:

• renderInContext:

Known issues

There are some possible problems with custom patterns as view backgrounds.

License

MIT. See LICENSE.