贝塞尔结合CAShapeLayer绘制路线,CABasicAnimation实现的小动画 iOS

最近项目需求,做的一个标识正在直播的小动画,代码如下:
【贝塞尔结合CAShapeLayer绘制路线,CABasicAnimation实现的小动画】#import "YGIsOnLiveAnmationView.h"

@interface YGIsOnLiveAnmationView ()

@property (strong, nonatomic) CAShapeLayer * progressLayer;
@property (strong, nonatomic) CAShapeLayer * triangleLayer;

@property (strong, nonatomic) CABasicAnimation *rotateAnimation;

@property (assign, nonatomic) CGFloat progressLineWidth;

@property (strong, nonatomic) UIColor * progressLineColor;

@end

@implementation YGIsOnLiveAnmationView

/*
// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
- (void)drawRect:(CGRect)rect {
// Drawing code
}
*/

- (instancetype)initWithFrame:(CGRect)frame lineWidth:(CGFloat)lineWidthlineColor:(UIColor *)lineColor {

self= [self initWithFrame:frame];

if (self) {

self.progressLineWidth = lineWidth;
self.progressLineColor = lineColor;

[self.layer addSublayer:self.progressLayer];
[self.layer addSublayer:self.triangleLayer];
}

return self;
}

- (void)startProgressAnimation {
[self.progressLayer addAnimation:self.rotateAnimation forKey:@"group"];
}

//画三角形
- (CAShapeLayer *)triangleLayer {

if (!_triangleLayer) {

_triangleLayer= [CAShapeLayer layer];

UIBezierPath *path = [UIBezierPath bezierPath];

CGFloat X = self.center.x;
CGFloat Y = self.center.y;

[path moveToPoint:CGPointMake(X-3, Y-5)];
[path addLineToPoint:CGPointMake(X-3, Y+5)];
[path addLineToPoint:CGPointMake(X+5, Y)];

[path closePath];
[self.progressLineColor setFill];
[path fill];

_triangleLayer.path = path.CGPath;
}
return _triangleLayer;
}

//画进度
- (CAShapeLayer *)progressLayer {
if (!_progressLayer) {
_progressLayer = [CAShapeLayer layer];

CGFloat width= CGRectGetWidth(self.frame);
CGFloat height= CGRectGetHeight(self.frame);

_progressLayer.frame= CGRectMake(0, 0, width, height);
_progressLayer.position = CGPointMake(width/2.0,height/2.0);

UIBezierPath *aPath= [UIBezierPath bezierPathWithArcCenter:CGPointMake(width/2.0, height/2.0)
radius:(width - self.progressLineWidth)/2.0
startAngle:0
endAngle:M_PI_4 * 7
clockwise:YES];
[aPath stroke];

_progressLayer.path= aPath.CGPath;
_progressLayer.fillColor= [UIColor clearColor].CGColor;
_progressLayer.lineWidth= self.progressLineWidth;
_progressLayer.strokeColor = self.progressLineColor.CGColor;
_progressLayer.lineCap= kCALineCapRound;
}
return _progressLayer;
}

- (CABasicAnimation *)rotateAnimation {
if (!_rotateAnimation) {
_rotateAnimation= [CABasicAnimation animationWithKeyPath:@"transform.rotation.z"];
_rotateAnimation.timingFunction= [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionLinear];
_rotateAnimation.toValue= https://www.it610.com/article/@(M_PI * 2);
_rotateAnimation.fromValue= https://www.it610.com/article/@(0);
_rotateAnimation.duration= 1;
_rotateAnimation.removedOnCompletion = NO;
_rotateAnimation.repeatCount= FLT_MAX;
}
return _rotateAnimation;
}

@end

贝塞尔结合CAShapeLayer绘制路线,CABasicAnimation实现的小动画

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