CGLayer is a great tool for implementing clean and high-performance drawing strokes in a drawing app. To make use of CGLayer to create strokes, you possibly can comply with these steps:
1 – Create a CGLayer object with the specified measurement and context.
CGSize measurement = CGSizeMake(width, peak);
CGContextRef context = UIGraphicsGetCurrentContext();
CGLayerRef layer = CGLayerCreateWithContext(context, measurement, NULL);
2 – Get a reference to the context of the layer, and set the road width, line cap, and line be a part of types.
CGContextRef layerContext = CGLayerGetContext(layer);
CGContextSetLineWidth(layerContext, lineWidth);
CGContextSetLineCap(layerContext, kCGLineCapRound);
CGContextSetLineJoin(layerContext, kCGLineJoinRound);
3 – Draw the stroke onto the layer context utilizing CGPathAddLineToPoint and CGPathMoveToPoint features.
CGContextBeginPath(layerContext);
CGContextMoveToPoint(layerContext, x1, y1);
CGContextAddLineToPoint(layerContext, x2, y2);
CGContextStrokePath(layerContext);
4 – While you wish to draw the layer onto the principle context, use CGContextDrawLayerAtPoint operate.
CGContextDrawLayerAtPoint(context, CGPointZero, layer);
Alternatively, you need to use UIBezierPath to create the strokes and draw them onto the context. Right here is an instance:
1 – Create a UIBezierPath object and add factors to it.
UIBezierPath *path = [UIBezierPath bezierPath];
[path moveToPoint:CGPointMake(x1, y1)];
[path addLineToPoint:CGPointMake(x2, y2)];
2 – Set the road width, line cap, and line be a part of types.
[path setLineWidth:lineWidth];
[path setLineCapStyle:kCGLineCapRound];
[path setLineJoinStyle:kCGLineJoinRound];
3 – Draw the trail onto the context utilizing the stroke technique.
[[UIColor blackColor] setStroke];
[path stroke];
Each strategies can be utilized to create clean and high-performance drawing strokes in a drawing app. The selection of technique is dependent upon your desire and the complexity of your app.
