UIBezierPath動(dòng)畫(huà)

1、前幾篇主要是講UIBezierPath 繪制基本圖形，現(xiàn)在我們將這些圖形用動(dòng)畫(huà)的形式展示出來(lái)。

效果圖：

函數(shù)代碼：

/**

*? 曲線動(dòng)畫(huà)

*/

-(void)secondBeziePathDrawAnimation

{

//曲線

UIBezierPath *path=[UIBezierPath bezierPath];

//起點(diǎn)

[path moveToPoint:CGPointMake(20, 20)];

// 基本曲線

//[path addQuadCurveToPoint:CGPointMake(self.frame.size.width-30, 20) controlPoint:CGPointMake(self.frame.size.width/2., self.frame.size.height/2.)];

//二次曲線

[path addCurveToPoint:CGPointMake(self.frame.size.width-30, 20) controlPoint1:CGPointMake(self.frame.size.width/4., 0) controlPoint2:CGPointMake(120., 120)];

CAShapeLayer *sLayer=[CAShapeLayer layer];

sLayer.fillColor=[UIColor clearColor].CGColor;

//畫(huà)筆顏色

sLayer.strokeColor=[UIColor redColor].CGColor;

//畫(huà)筆寬度

sLayer.lineWidth=2.f;

//路徑

sLayer.path=path.CGPath;

sLayer.strokeStart=0.;

sLayer.strokeEnd=1.;

[self.layer addSublayer:sLayer];

//動(dòng)畫(huà)效果

CABasicAnimation *slayerAnimat=[CABasicAnimation animationWithKeyPath:@"strokeEnd"];

slayerAnimat.duration=5;

slayerAnimat.fromValue=[NSNumber numberWithFloat:0.];

slayerAnimat.toValue=[NSNumber numberWithFloat:1.];

slayerAnimat.timingFunction=[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];

slayerAnimat.fillMode=kCAFillModeForwards;

slayerAnimat.removedOnCompletion=YES;

[sLayer addAnimation:slayerAnimat forKey:@"path"];

}