Graphics Reference
In-Depth Information
@end
@implementation
ViewController
- (
void
)viewDidLoad
{
[
super
viewDidLoad
];
//create timing function
CAMediaTimingFunction
*function =
[
CAMediaTimingFunction
functionWithName
:
kCAMediaTimingFunctionEaseOut
];
//get control points
CGPoint
controlPoint1, controlPoint2;
[function
getControlPointAtIndex
:
1
values
:(
float
*)&controlPoint1];
[function
getControlPointAtIndex
:
2
values
:(
float
*)&controlPoint2];
//create curve
UIBezierPath
*path = [[
UIBezierPath
alloc
]
init
];
[path
moveToPoint
:
CGPointZero
];
[path
addCurveToPoint
:
CGPointMake
(
1
,
1
)
controlPoint1
:controlPoint1
controlPoint2
:controlPoint2];
//scale the path up to a reasonable size for display
[path
applyTransform
:
CGAffineTransformMakeScale
(
200
,
200
)];
//create shape layer
CAShapeLayer
*shapeLayer = [
CAShapeLayer
layer
];
shapeLayer.
strokeColor
= [
UIColor
redColor
].
CGColor
;
shapeLayer.
fillColor
= [
UIColor
clearColor
].
CGColor
;
shapeLayer.
lineWidth
=
4.0f
;
shapeLayer.
path
= path.
CGPath
;
[
self
.
layerView
.
layer
addSublayer
:shapeLayer];
//flip geometry so that 0,0 is in the bottom-left
self
.
layerView
.
layer
.
geometryFlipped
=
YES
;
}
@end
