
看到这张图,是不是觉得挺萌的,那是如何实现的呢?在iOS中有一个类叫UIBezierPath(贝塞尔曲线),这两天研究了一下UIBezierPath和CAShapeLayer,根据别人分享的教程,画了这个萌萌的哆啦A梦。
UIBezierPath: UIBezierPath是在 UIKit 中的一个类,继承于NSObject,可以创建基于矢量的路径.此类是Core Graphics框架关于path的一个OC封装。使用此类可以定义常见的圆形、多边形等形状 。我们使用直线、弧(arc)来创建复杂的曲线形状。每一个直线段或者曲线段的结束的地方是下一个的开始的地方。每一个连接的直线或者曲线段的集合成为subpath。一个UIBezierPath对象定义一个完整的路径包括一个或者多个subpaths。
CAShapeLayer: 继承于CALayer。 每个CAShapeLayer对象都代表着将要被渲染到屏幕上的一个任意的形状(shape)。具体的形状由其path(类型为CGPathRef)属性指定。 普通的CALayer是矩形,所以需要frame属性。CAShapeLayer它本身没有形状,它的形状来源于其属性path 。CAShapeLayer有不同于CALayer的属性,它从CALayer继承而来的属性在绘制时是不起作用的。
基本用法:
画圆弧: + (instancetype)bezierPathWithArcCenter:(CGPoint)center radius:(CGFloat)radius startAngle:(CGFloat)startAngle endAngle:(CGFloat)endAngle clockwise:(BOOL)clockwise;
画二元曲线和三元曲线,一般和moveToPoint配合使用。
其中 endPoint表示:曲线的终点 ;controlPoint表示:画曲线的基准点
知道基本画法后我们就可以画哆啦A梦了。
1、先画头部。先画一个圆。
// 确定头部所在的圆心 CGFloat headCornerRadius=80; CGFloat arcCenterX=self.view.frame.size.width/2; CGFloat arcCenterY= 120+headCornerRadius; //画头部 CAShapeLayer *headLayer=[[CAShapeLayer alloc] init]; UIBezierPath *headPath=[UIBezierPath bezierPathWithRoundedRect:CGRectMake(self.view.frame.size.width/2-headCornerRadius, 120, headCornerRadius*2, headCornerRadius*2) cornerRadius:headCornerRadius]; [self setLayer:headLayer path:headPath];
2、画脸部。画一个比头部小点的圆,与头部圆的底部内切。
//脸 CAShapeLayer *faceLayer=[CAShapeLayer layer]; UIBezierPath *facePath=[UIBezierPath bezierPathWithArcCenter:CGPointMake(self.view.frame.size.width/2, 120+headCornerRadius+10) radius:70 startAngle:M_PI endAngle:3*M_PI clockwise:YES]; [self setLayer:faceLayer path:facePath];
3、画眼部
//左眼 CAShapeLayer *leftEyeLayer = [CAShapeLayer layer]; UIBezierPath *leftEyePath = [UIBezierPath bezierPath]; [leftEyePath moveToPoint:CGPointMake(arcCenterX-30, arcCenterY-25)]; [leftEyePath addQuadCurveToPoint:CGPointMake(arcCenterX-15, arcCenterY-45) controlPoint:CGPointMake(arcCenterX-30, arcCenterY-45)]; [leftEyePath addQuadCurveToPoint:CGPointMake(arcCenterX, arcCenterY-25) controlPoint:CGPointMake(arcCenterX, arcCenterY-45)]; [leftEyePath addQuadCurveToPoint:CGPointMake(arcCenterX-15, arcCenterY-5) controlPoint:CGPointMake(arcCenterX, arcCenterY-5)]; [leftEyePath addQuadCurveToPoint:CGPointMake(arcCenterX-30, arcCenterY-25) controlPoint:CGPointMake(arcCenterX-30, arcCenterY-5)]; [self setLayer:leftEyeLayer path:leftEyePath]; //左眼珠 CAShapeLayer *leftEyeballLayer = [CAShapeLayer layer]; UIBezierPath *leftEyeballPath = [UIBezierPath bezierPathWithArcCenter:CGPointMake(arcCenterX-5, arcCenterY-30) radius:2.5 startAngle:0 endAngle:2*M_PI clockwise:YES]; [self setLayer:leftEyeballLayer path:leftEyeballPath ]; //右眼 CAShapeLayer *rightEyeLayer = [CAShapeLayer layer]; UIBezierPath *rightEyePath = [UIBezierPath bezierPath]; [rightEyePath moveToPoint:CGPointMake(arcCenterX, arcCenterY-25)]; [rightEyePath addQuadCurveToPoint:CGPointMake(arcCenterX+15, arcCenterY-45) controlPoint:CGPointMake(arcCenterX, arcCenterY-45)]; [rightEyePath addQuadCurveToPoint:CGPointMake(arcCenterX+30, arcCenterY-25) controlPoint:CGPointMake(arcCenterX+30, arcCenterY-45)]; [rightEyePath addQuadCurveToPoint:CGPointMake(arcCenterX+15, arcCenterY-5) controlPoint:CGPointMake(arcCenterX+30, arcCenterY-5)]; [rightEyePath addQuadCurveToPoint:CGPointMake(arcCenterX, arcCenterY-25) controlPoint:CGPointMake(arcCenterX, arcCenterY-5)]; [self setLayer:rightEyeLayer path:rightEyePath ]; //右眼珠 CAShapeLayer *rightEyeballLayer = [CAShapeLayer layer]; UIBezierPath *rightEyeballPath = [UIBezierPath bezierPathWithArcCenter:CGPointMake(arcCenterX+5, arcCenterY-30) radius:2.5 startAngle:0 endAngle:2*M_PI clockwise:YES]; [self setLayer:rightEyeballLayer path:rightEyeballPath];
4、画鼻子、嘴巴、胡须
//鼻子 CAShapeLayer *noseLayer = [CAShapeLayer layer]; UIBezierPath *nosePath = [UIBezierPath bezierPathWithArcCenter:CGPointMake(arcCenterX, arcCenterY) radius:10 startAngle:0 endAngle:2*M_PI clockwise:YES]; [self setLayer:noseLayer path:nosePath ]; //鼻子光晕 CAShapeLayer *noseHaloLayer = [CAShapeLayer layer]; UIBezierPath *noseHaloPath = [UIBezierPath bezierPathWithArcCenter:CGPointMake(arcCenterX-4, arcCenterY-5) radius:2.5 startAngle:0 endAngle:2*M_PI clockwise:YES]; [self setLayer:noseHaloLayer path:noseHaloPath ]; //嘴巴 CAShapeLayer *mouthLayer = [CAShapeLayer layer]; UIBezierPath *mouthPath = [UIBezierPath bezierPath]; [mouthPath moveToPoint:CGPointMake(arcCenterX-60, arcCenterY+25)]; [mouthPath addQuadCurveToPoint:CGPointMake(arcCenterX+60, arcCenterY+25) controlPoint:CGPointMake(arcCenterX, arcCenterY+90)]; [self setLayer:mouthLayer path:mouthPath]; CAShapeLayer *mouthLayer1 = [CAShapeLayer layer]; UIBezierPath *mouthPath1 = [UIBezierPath bezierPath]; [mouthPath1 moveToPoint:CGPointMake(arcCenterX, arcCenterY+10)]; [mouthPath1 addLineToPoint:CGPointMake(arcCenterX, arcCenterY+55)]; [self setLayer:mouthLayer1 path:mouthPath1]; //胡须 [self addBeardFromPoint:CGPointMake(arcCenterX-58, arcCenterY-5) toPoint:CGPointMake(arcCenterX-15, arcCenterY+10) ]; [self addBeardFromPoint:CGPointMake(arcCenterX-68, arcCenterY+15) toPoint:CGPointMake(arcCenterX-15, arcCenterY+20) ]; [self addBeardFromPoint:CGPointMake(arcCenterX-61, arcCenterY+45) toPoint:CGPointMake(arcCenterX-15, arcCenterY+30) ]; [self addBeardFromPoint:CGPointMake(arcCenterX+58, arcCenterY-5) toPoint:CGPointMake(arcCenterX+15, arcCenterY+10) ]; [self addBeardFromPoint:CGPointMake(arcCenterX+68, arcCenterY+15) toPoint:CGPointMake(arcCenterX+15, arcCenterY+20) ]; [self addBeardFromPoint:CGPointMake(arcCenterX+61, arcCenterY+45) toPoint:CGPointMake(arcCenterX+15, arcCenterY+30) ];
5、画左手部分
//左手 CAShapeLayer *leftHandLayer = [CAShapeLayer layer]; UIBezierPath *leftHandPath = [UIBezierPath bezierPathWithArcCenter:CGPointMake(arcCenterX-95, arcCenterY+110) radius:20 startAngle:0 endAngle:2*M_PI clockwise:YES]; [self setLayer:leftHandLayer path:leftHandPath ]; //左胳膊 CGFloat distanceXToArcCenter = 80*cos(M_PI_2*4/9); CGFloat distanceYToArcCenter = 80*sin(M_PI_2*4/9); CAShapeLayer *leftArmLayer = [CAShapeLayer layer]; UIBezierPath *leftArmPath = [UIBezierPath bezierPath]; [leftArmPath moveToPoint:CGPointMake(arcCenterX-distanceXToArcCenter, arcCenterY+distanceYToArcCenter)]; [leftArmPath addLineToPoint:CGPointMake(arcCenterX-95, arcCenterY+90)]; [leftArmPath addQuadCurveToPoint:CGPointMake(arcCenterX-75, arcCenterY+110) controlPoint:CGPointMake(arcCenterX-92, arcCenterY+107)]; [leftArmPath addLineToPoint:CGPointMake(arcCenterX-distanceXToArcCenter+1.5, arcCenterY+95)]; [self setLayer:leftArmLayer path:leftArmPath ];
6、画身体部分
//围巾 CAShapeLayer *mufflerLayer = [CAShapeLayer layer]; UIBezierPath *mufflerPath = [UIBezierPath bezierPath]; [mufflerPath moveToPoint:CGPointMake(arcCenterX-distanceXToArcCenter, arcCenterY+distanceYToArcCenter)]; [mufflerPath addQuadCurveToPoint:CGPointMake(arcCenterX+distanceXToArcCenter, arcCenterY+distanceYToArcCenter) controlPoint:CGPointMake(arcCenterX, arcCenterY+109)]; [mufflerPath addLineToPoint:CGPointMake(arcCenterX+distanceXToArcCenter+2, arcCenterY+distanceYToArcCenter+7)]; [mufflerPath addQuadCurveToPoint:CGPointMake(arcCenterX-distanceXToArcCenter-4, arcCenterY+distanceYToArcCenter+5) controlPoint:CGPointMake(arcCenterX, arcCenterY+115)]; [mufflerPath addLineToPoint:CGPointMake(arcCenterX-distanceXToArcCenter, arcCenterY+distanceYToArcCenter)]; [self setLayer:mufflerLayer path:mufflerPath ]; //身体 CAShapeLayer *bodyLayer = [CAShapeLayer layer]; UIBezierPath *bodyPath = [UIBezierPath bezierPath]; [bodyPath moveToPoint:CGPointMake(arcCenterX-distanceXToArcCenter, arcCenterY+distanceYToArcCenter+7)]; [bodyPath addQuadCurveToPoint:CGPointMake(arcCenterX-distanceXToArcCenter+5, arcCenterY+150) controlPoint:CGPointMake(arcCenterX-distanceXToArcCenter+2, arcCenterY+140)]; [bodyPath addQuadCurveToPoint:CGPointMake(arcCenterX-distanceXToArcCenter+3, arcCenterY+170) controlPoint:CGPointMake(arcCenterX-distanceXToArcCenter, arcCenterY+160)]; [bodyPath addQuadCurveToPoint:CGPointMake(arcCenterX-8, arcCenterY+170) controlPoint:CGPointMake(arcCenterX-(distanceXToArcCenter+5)/2, arcCenterY+175)]; [bodyPath addQuadCurveToPoint:CGPointMake(arcCenterX+8, arcCenterY+170) controlPoint:CGPointMake(arcCenterX, arcCenterY+155)]; [bodyPath addQuadCurveToPoint:CGPointMake(arcCenterX+distanceXToArcCenter-3, arcCenterY+170) controlPoint:CGPointMake(arcCenterX+(distanceXToArcCenter+5)/2, arcCenterY+175)]; [bodyPath addQuadCurveToPoint:CGPointMake(arcCenterX+distanceXToArcCenter-5, arcCenterY+150) controlPoint:CGPointMake(arcCenterX+distanceXToArcCenter-2, arcCenterY+160)]; [bodyPath addQuadCurveToPoint:CGPointMake(arcCenterX+distanceXToArcCenter, arcCenterY+distanceYToArcCenter+8) controlPoint:CGPointMake(arcCenterX+distanceXToArcCenter-2, arcCenterY+140)]; [bodyPath addQuadCurveToPoint:CGPointMake(arcCenterX-distanceXToArcCenter, arcCenterY+distanceYToArcCenter+7) controlPoint:CGPointMake(arcCenterX, arcCenterY+115)]; [self setLayer:bodyLayer path:bodyPath ]; //左脚 CAShapeLayer *leftFootLayer = [CAShapeLayer layer]; UIBezierPath *leftFootPath = [UIBezierPath bezierPath]; [leftFootPath moveToPoint:CGPointMake(arcCenterX-distanceXToArcCenter+3, arcCenterY+170)]; [leftFootPath addQuadCurveToPoint:CGPointMake(arcCenterX-distanceXToArcCenter+3, arcCenterY+195) controlPoint:CGPointMake(arcCenterX-distanceXToArcCenter-20, arcCenterY+185)]; [leftFootPath addQuadCurveToPoint:CGPointMake(arcCenterX-13, arcCenterY+195) controlPoint:CGPointMake(arcCenterX-(distanceXToArcCenter+10)/2, arcCenterY+200)]; [leftFootPath addQuadCurveToPoint:CGPointMake(arcCenterX-10, arcCenterY+170) controlPoint:CGPointMake(arcCenterX+8, arcCenterY+187)]; [self setLayer:leftFootLayer path:leftFootPath ]; //右脚 CAShapeLayer *rightFootLayer = [CAShapeLayer layer]; UIBezierPath *rightFootPath = [UIBezierPath bezierPath]; [rightFootPath moveToPoint:CGPointMake(arcCenterX+10, arcCenterY+170)]; [rightFootPath addQuadCurveToPoint:CGPointMake(arcCenterX+15, arcCenterY+195) controlPoint:CGPointMake(arcCenterX-12, arcCenterY+185)]; [rightFootPath addQuadCurveToPoint:CGPointMake(arcCenterX+distanceXToArcCenter-5, arcCenterY+195) controlPoint:CGPointMake(arcCenterX+(distanceXToArcCenter+20)/2, arcCenterY+200)]; [rightFootPath addQuadCurveToPoint:CGPointMake(arcCenterX+distanceXToArcCenter-3, arcCenterY+170) controlPoint:CGPointMake(arcCenterX+distanceXToArcCenter+18, arcCenterY+185)]; [self setLayer:rightFootLayer path:rightFootPath]; //肚子 CAShapeLayer *bellyLayer = [CAShapeLayer layer]; UIBezierPath *bellyPath = [UIBezierPath bezierPath]; [bellyPath moveToPoint:CGPointMake(arcCenterX-30, arcCenterY+80)]; [bellyPath addCurveToPoint:CGPointMake(arcCenterX-30, arcCenterY+150) controlPoint1:CGPointMake(arcCenterX-65, arcCenterY+95) controlPoint2:CGPointMake(arcCenterX-60, arcCenterY+140)]; [bellyPath addQuadCurveToPoint:CGPointMake(arcCenterX+30, arcCenterY+150) controlPoint:CGPointMake(arcCenterX, arcCenterY+160)]; [bellyPath addCurveToPoint:CGPointMake(arcCenterX+30, arcCenterY+80) controlPoint1:CGPointMake(arcCenterX+60, arcCenterY+140) controlPoint2:CGPointMake(arcCenterX+65, arcCenterY+95)]; [bellyPath addQuadCurveToPoint:CGPointMake(arcCenterX-30, arcCenterY+80) controlPoint:CGPointMake(arcCenterX, arcCenterY+92)]; [self setLayer:bellyLayer path:bellyPath ]; //铃铛 CAShapeLayer *bellLayer = [CAShapeLayer layer]; UIBezierPath *bellPath = [UIBezierPath bezierPathWithArcCenter:CGPointMake(arcCenterX, arcCenterY+97) radius:15 startAngle:0 endAngle:2*M_PI clockwise:YES]; [self setLayer:bellLayer path:bellPath ]; //铃铛上的线 CAShapeLayer *bellLineLayer = [CAShapeLayer layer]; UIBezierPath *BellLinePath = [UIBezierPath bezierPath]; [BellLinePath moveToPoint:CGPointMake(arcCenterX-(sqrt(pow(15.0, 2)-pow(5.0, 2))), arcCenterY+92)]; [BellLinePath addLineToPoint:CGPointMake(arcCenterX+(sqrt(pow(15.0, 2)-pow(5.0, 2))), arcCenterY+92)]; [BellLinePath moveToPoint:CGPointMake(arcCenterX+(sqrt(pow(15.0, 2)-pow(2.0, 2))), arcCenterY+95)]; [BellLinePath addLineToPoint:CGPointMake(arcCenterX-(sqrt(pow(15.0, 2)-pow(2.0, 2))), arcCenterY+95)]; [self setLayer:bellLineLayer path:BellLinePath ]; //铃铛上的小圆点 CAShapeLayer *bellCirLayer = [CAShapeLayer layer]; UIBezierPath *bellCirPath = [UIBezierPath bezierPathWithArcCenter:CGPointMake(arcCenterX, arcCenterY+102) radius:2.5 startAngle:0 endAngle:2*M_PI clockwise:YES]; [bellCirPath moveToPoint:CGPointMake(arcCenterX, arcCenterY+104.5)]; [bellCirPath addLineToPoint:CGPointMake(arcCenterX, arcCenterY+112)]; [self setLayer:bellCirLayer path:bellCirPath ]; //口袋 CAShapeLayer *bagLayer = [CAShapeLayer layer]; UIBezierPath *bagPath = [UIBezierPath bezierPath]; [bagPath moveToPoint:CGPointMake(arcCenterX-40, arcCenterY+112)]; [bagPath addQuadCurveToPoint:CGPointMake(arcCenterX+40, arcCenterY+112) controlPoint:CGPointMake(arcCenterX, arcCenterY+120)]; [bagPath addCurveToPoint:CGPointMake(arcCenterX-40, arcCenterY+112) controlPoint1:CGPointMake(arcCenterX+28, arcCenterY+160) controlPoint2:CGPointMake(arcCenterX-28, arcCenterY+160)]; [self setLayer:bagLayer path:bagPath ];
7、画右手部分
//右手 CAShapeLayer *rightHandLayer = [CAShapeLayer layer]; UIBezierPath *rightHandPath = [UIBezierPath bezierPathWithArcCenter:CGPointMake(arcCenterX+85*cos(27/180.0*M_PI), arcCenterY-85*sin(27/180.0*M_PI)) radius:20 startAngle:0 endAngle:2*M_PI clockwise:YES]; [self setLayer:rightHandLayer path:rightHandPath ]; //右胳膊 CAShapeLayer *rightArmLayer = [CAShapeLayer layer]; UIBezierPath *rightArmPath = [UIBezierPath bezierPath]; [rightArmPath moveToPoint:CGPointMake(arcCenterX+80*cos(13/180.0*M_PI), arcCenterY-80*sin(13/180.0*M_PI))]; [rightArmPath addQuadCurveToPoint:CGPointMake(arcCenterX+distanceXToArcCenter, arcCenterY+distanceYToArcCenter) controlPoint:CGPointMake(arcCenterX+80*cos(13/180.0*M_PI)+9, arcCenterY+20)]; [rightArmPath addLineToPoint:CGPointMake(arcCenterX+distanceXToArcCenter, arcCenterY+distanceYToArcCenter+25)]; [rightArmPath addQuadCurveToPoint:CGPointMake(arcCenterX+93*cos(15/180.0*M_PI), arcCenterY-93*sin(15/180.0*M_PI)) controlPoint:CGPointMake(arcCenterX+90*cos(13/180.0*M_PI)+15, arcCenterY+25)]; [rightArmPath addQuadCurveToPoint:CGPointMake(arcCenterX+80*cos(13/180.0*M_PI), arcCenterY-80*sin(13/180.0*M_PI)) controlPoint:CGPointMake(arcCenterX+80*cos(13/180.0*M_PI)+5, arcCenterY-93*sin(15/180.0*M_PI)+5)]; [self setLayer:rightArmLayer path:rightArmPath]; UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(self.view.frame.size.width/2+90, 120, 70, 30)]; label.textAlignment = NSTextAlignmentCenter; label.textColor = [UIColor colorWithRed:21/255.0 green:159/255.0 blue:237/255.0 alpha:1]; label.text = @"Hello"; label.font = [UIFont fontWithName:@"Chalkduster" size:20]; [self.view addSubview:label]; CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:@"transform.scale"]; animation.fromValue = @(0); animation.toValue = @(1); animation.duration = 0.5f; [label.layer addAnimation:animation forKey:nil];
8、给各个部位上颜色
//上色 faceLayer.fillColor = [UIColor whiteColor].CGColor; leftEyeLayer.fillColor = [UIColor whiteColor].CGColor; rightEyeLayer.fillColor = [UIColor whiteColor].CGColor; leftEyeBallLayer.fillColor = [UIColor blackColor].CGColor; rightEyeBallLayer.fillColor = [UIColor blackColor].CGColor; noseLayer.fillColor = [UIColor redColor].CGColor; noseHaloLayer.fillColor = [UIColor whiteColor].CGColor; headLayer.fillColor = [UIColor colorWithRed:21/255.0 green:159/255.0 blue:237/255.0 alpha:1].CGColor; leftArmLayer.fillColor = [UIColor colorWithRed:21/255.0 green:159/255.0 blue:237/255.0 alpha:1].CGColor; leftHandLayer.fillColor = [UIColor whiteColor].CGColor; mufflerLayer.fillColor = [UIColor redColor].CGColor; bellyLayer.fillColor = [UIColor whiteColor].CGColor; bellLayer.fillColor = [UIColor yellowColor].CGColor; bodyLayer.fillColor = [UIColor colorWithRed:21/255.0 green:159/255.0 blue:237/255.0 alpha:1].CGColor; rightHandLayer .fillColor=[UIColor whiteColor].CGColor ; rightArmLayer .fillColor=[UIColor colorWithRed:21/255.0 green:159/255.0 blue:237/255.0 alpha:1] .CGColor;
这样,一个简单的哆啦A梦就实现了。
文中只展示了重要部分的代码,如果有需要,可以看完整的demo,同时demo里面也展示了UIBezierPath和CAShapeLayer基本的画图方法。
demo地址
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持。
# iOS贝塞尔曲线画哆啦A梦
# iOS贝塞尔曲线
# ios 贝塞尔曲线切割圆角的方法
# 快速上手IOS UIBezierPath(贝塞尔曲线)
# IOS 贝塞尔曲线(UIBezierPath)属性、方法整理
# iOS实现贝塞尔曲线动画
# 哆啦
# 此类
# 画一
# 是在
# 那是
# 展示了
# 多个
# 而来
# 中有
# 看完
# 眼部
# 这两天
# 于其
# 脸部
# 画了
# 由其
# 大家多多
# 如何实现
# 就可以
# 塞尔
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