标签：style class blog code java http
CAShapeLayer的使用[2]
CAShapeLayer支持的动画类型有如下这些.
------------------------------------------------------------------------------
/* The path defining the shape to be rendered. If the path
extends
* outside the layer bounds it will not automatically be
clipped to the
* layer, only if the normal layer masking rules
cause that. Defaults
* to null. Animatable. (Note that although
the path property is
* animatable, no implicit animation
will be created when the property
* is changed.)
*/
@property CGPathRef path;
------------------------------------------------------------------------------
/* The color to fill the path‘s stroked outline, or nil for no
stroking.
* Defaults to nil. Animatable. */
@property
CGColorRef strokeColor;
------------------------------------------------------------------------------
/* These values define the subregion of the path used to draw
the
* stroked outline. The values must be in the range [0,1] with
zero
* representing the start of the path and one the end. Values
in
* between zero and one are interpolated linearly along the
path
* length. strokeStart defaults to zero and strokeEnd to one.
Both are
* animatable. */
@property
CGFloat strokeStart, strokeEnd;
------------------------------------------------------------------------------
/* The line width used when stroking the path. Defaults to
one.
* Animatable.
*/
@property CGFloat lineWidth;
------------------------------------------------------------------------------
/*
The miter limit used when stroking the path. Defaults to ten.
*
Animatable.
*/
@property CGFloat miterLimit;
------------------------------------------------------------------------------
/* The phase of the dashing pattern applied when creating the
stroke.
* Defaults to zero. Animatable. */
@property
CGFloat lineDashPhase;
------------------------------------------------------------------------------
现在来尝试path动画,结果如下:
首先用工具生成path源码:
源码:
- (void)viewDidLoad { [super viewDidLoad]; // shapeLayer CAShapeLayer *circleLayer = [CAShapeLayer layer]; circleLayer.frame = (CGRect){CGPointMake(0, 0), CGSizeMake(200, 200)}; circleLayer.position = self.view.center; circleLayer.path = [self getStar1BezierPath].CGPath; circleLayer.fillColor = [UIColor clearColor].CGColor; circleLayer.strokeColor = [UIColor redColor].CGColor; circleLayer.lineWidth = 2.f; [self.view.layer addSublayer:circleLayer]; // 定时器 _timer = [[GCDTimer alloc] initInQueue:[GCDQueue mainQueue]]; [_timer event:^{ static int i = 0; if (i++ % 2 == 0) { CABasicAnimation *circleAnim = [CABasicAnimation animationWithKeyPath:@"path"]; circleAnim.removedOnCompletion = NO; circleAnim.duration = 1; circleAnim.fromValue = (__bridge id)[self getStar1BezierPath].CGPath; circleAnim.toValue = (__bridge id)[self getStar2BezierPath].CGPath; circleLayer.path = [self getStar2BezierPath].CGPath; [circleLayer addAnimation:circleAnim forKey:@"animateCirclePath"]; } else { CABasicAnimation *circleAnim = [CABasicAnimation animationWithKeyPath:@"path"]; circleAnim.removedOnCompletion = NO; circleAnim.duration = 1; circleAnim.fromValue = (__bridge id)[self getStar2BezierPath].CGPath; circleAnim.toValue = (__bridge id)[self getStar1BezierPath].CGPath; circleLayer.path = [self getStar1BezierPath].CGPath; [circleLayer addAnimation:circleAnim forKey:@"animateCirclePath"]; } } timeInterval:NSEC_PER_SEC]; [_timer start]; } -(UIBezierPath *)getStar1BezierPath { //// Star Drawing UIBezierPath* starPath = [UIBezierPath bezierPath]; [starPath moveToPoint: CGPointMake(22.5, 2.5)]; [starPath addLineToPoint: CGPointMake(28.32, 14.49)]; [starPath addLineToPoint: CGPointMake(41.52, 16.32)]; [starPath addLineToPoint: CGPointMake(31.92, 25.56)]; [starPath addLineToPoint: CGPointMake(34.26, 38.68)]; [starPath addLineToPoint: CGPointMake(22.5, 32.4)]; [starPath addLineToPoint: CGPointMake(10.74, 38.68)]; [starPath addLineToPoint: CGPointMake(13.08, 25.56)]; [starPath addLineToPoint: CGPointMake(3.48, 16.32)]; [starPath addLineToPoint: CGPointMake(16.68, 14.49)]; [starPath closePath]; return starPath; } -(UIBezierPath *)getStar2BezierPath { //// Star Drawing UIBezierPath* starPath = [UIBezierPath bezierPath]; [starPath moveToPoint: CGPointMake(22.5, 2.5)]; [starPath addLineToPoint: CGPointMake(32.15, 9.21)]; [starPath addLineToPoint: CGPointMake(41.52, 16.32)]; [starPath addLineToPoint: CGPointMake(38.12, 27.57)]; [starPath addLineToPoint: CGPointMake(34.26, 38.68)]; [starPath addLineToPoint: CGPointMake(22.5, 38.92)]; [starPath addLineToPoint: CGPointMake(10.74, 38.68)]; [starPath addLineToPoint: CGPointMake(6.88, 27.57)]; [starPath addLineToPoint: CGPointMake(3.48, 16.32)]; [starPath addLineToPoint: CGPointMake(12.85, 9.21)]; [starPath closePath]; return starPath; }
CALayer中有一个令人抽搐的属性叫mask,据说可以做动画,官方文档上说可以:
但其属性说明中根本就没有animatable字眼.
/* A layer whose alpha channel is used as a mask to select between
the
* layer‘s background and the result of compositing the
layer‘s
* contents with its filtered background. Defaults to nil.
When used as
* a mask the layer‘s `compositingFilter‘ and
`backgroundFilters‘
* properties are ignored. When setting the
mask to a new layer, the
* new layer must have a nil superlayer,
otherwise the behavior is
* undefined.
*/
@property(retain) CALayer *mask;
这是个bug哦:).
将CAShapeLayer当做mask做动画的效果:
源码:
- (void)viewDidLoad { [super viewDidLoad]; // shapeLayer CAShapeLayer *circleLayer = [CAShapeLayer layer]; circleLayer.frame = (CGRect){CGPointMake(0, 0), CGSizeMake(200, 200)}; circleLayer.position = self.view.center; circleLayer.path = [self getStar1BezierPath].CGPath; circleLayer.fillColor = [UIColor blackColor].CGColor; circleLayer.strokeColor = [UIColor redColor].CGColor; circleLayer.lineWidth = 2.f; // backgroundLayer CALayer *layer = [CALayer layer]; layer.frame = self.view.bounds; layer.contents = (__bridge id)([UIImage imageNamed:@"psb.jpg"].CGImage); layer.mask = circleLayer; [self.view.layer addSublayer:layer]; // 定时器 _timer = [[GCDTimer alloc] initInQueue:[GCDQueue mainQueue]]; [_timer event:^{ static int i = 0; if (i++ % 2 == 0) { CABasicAnimation *circleAnim = [CABasicAnimation animationWithKeyPath:@"path"]; circleAnim.removedOnCompletion = NO; circleAnim.duration = 1; circleAnim.fromValue = (__bridge id)[self getStar1BezierPath].CGPath; circleAnim.toValue = (__bridge id)[self getStar2BezierPath].CGPath; circleLayer.path = [self getStar2BezierPath].CGPath; [circleLayer addAnimation:circleAnim forKey:@"animateCirclePath"]; } else { CABasicAnimation *circleAnim = [CABasicAnimation animationWithKeyPath:@"path"]; circleAnim.removedOnCompletion = NO; circleAnim.duration = 1; circleAnim.fromValue = (__bridge id)[self getStar2BezierPath].CGPath; circleAnim.toValue = (__bridge id)[self getStar1BezierPath].CGPath; circleLayer.path = [self getStar1BezierPath].CGPath; [circleLayer addAnimation:circleAnim forKey:@"animateCirclePath"]; } } timeInterval:NSEC_PER_SEC]; [_timer start]; } -(UIBezierPath *)getStar1BezierPath { //// Star Drawing UIBezierPath* starPath = [UIBezierPath bezierPath]; [starPath moveToPoint: CGPointMake(22.5, 2.5)]; [starPath addLineToPoint: CGPointMake(28.32, 14.49)]; [starPath addLineToPoint: CGPointMake(41.52, 16.32)]; [starPath addLineToPoint: CGPointMake(31.92, 25.56)]; [starPath addLineToPoint: CGPointMake(34.26, 38.68)]; [starPath addLineToPoint: CGPointMake(22.5, 32.4)]; [starPath addLineToPoint: CGPointMake(10.74, 38.68)]; [starPath addLineToPoint: CGPointMake(13.08, 25.56)]; [starPath addLineToPoint: CGPointMake(3.48, 16.32)]; [starPath addLineToPoint: CGPointMake(16.68, 14.49)]; [starPath closePath]; return starPath; } -(UIBezierPath *)getStar2BezierPath { //// Star Drawing UIBezierPath* starPath = [UIBezierPath bezierPath]; [starPath moveToPoint: CGPointMake(22.5, 2.5)]; [starPath addLineToPoint: CGPointMake(32.15, 9.21)]; [starPath addLineToPoint: CGPointMake(41.52, 16.32)]; [starPath addLineToPoint: CGPointMake(38.12, 27.57)]; [starPath addLineToPoint: CGPointMake(34.26, 38.68)]; [starPath addLineToPoint: CGPointMake(22.5, 38.92)]; [starPath addLineToPoint: CGPointMake(10.74, 38.68)]; [starPath addLineToPoint: CGPointMake(6.88, 27.57)]; [starPath addLineToPoint: CGPointMake(3.48, 16.32)]; [starPath addLineToPoint: CGPointMake(12.85, 9.21)]; [starPath closePath]; return starPath; }
附录:
用CAShapeLayer与贝塞尔曲线一起制作下载进度条是相当的容易的说:
//
//
RootViewController.m
//
//
Copyright (c) 2014年 Y.X. All rights reserved.
//
#import
"RootViewController.h"
#import "YXGCD.h"
@interface RootViewController
()
@property
(nonatomic, strong) GCDTimer *timer;
@end
@implementation
RootViewController
-
(void)viewDidLoad
{
[super viewDidLoad];
//
获取path
UIBezierPath *path =
[self getBezierPathWithLength:300 lineWidth:1];
//
shapeLayer
CAShapeLayer
*circleLayer = [CAShapeLayer layer];
circleLayer.frame =
path.bounds;
circleLayer.position =
self.view.center;
circleLayer.fillColor = [UIColor
clearColor].CGColor;
circleLayer.strokeColor = [UIColor
redColor].CGColor;
circleLayer.path =
path.CGPath;
circleLayer.lineWidth = 1.f;
[self.view.layer
addSublayer:circleLayer];
//
定时器
_timer = [[GCDTimer alloc] initInQueue:[GCDQueue
mainQueue]];
[_timer
event:^{
circleLayer.strokeEnd = arc4random()%100/100.f;
}
timeInterval:NSEC_PER_SEC];
[_timer start];
}
-(UIBezierPath
*)getBezierPathWithLength:(CGFloat)length
lineWidth:(CGFloat)lineWidth
{
//// Bezier
Drawing
UIBezierPath*
bezierPath = [UIBezierPath bezierPath];
[bezierPath moveToPoint: CGPointMake(0, 0)];
[bezierPath addLineToPoint: CGPointMake(length, 0)];
bezierPath.lineWidth
= lineWidth;
return
bezierPath;
}
@end
CAShapeLayer的使用[2],布布扣,bubuko.com
标签：style class blog code java http
原文地址：http://www.cnblogs.com/YouXianMing/p/3781191.html
