iOS之CGPath的应用（二）

1、矩形路径

CG_EXTERN CGPathRef  CGPathCreateWithRect(CGRect rect,

    const CGAffineTransform * __nullable transform)

- (void)createWithRect{

    CAShapeLayer *firstLayer = [CAShapeLayer layer];

    firstLayer.path = CGPathCreateWithRect(CGRectMake(, , , ), nil);

    firstLayer.fillColor = [UIColor redColor].CGColor;

    firstLayer.strokeColor = [UIColor blueColor].CGColor;

    firstLayer.lineWidth = ;

    [self.showView.layer addSublayer:firstLayer];

    self.pathRect.text = @"路径frame(90, 90, 20, 20)";

}ForeverGuard博客园

效果图

2、椭圆路径

CG_EXTERN CGPathRef  CGPathCreateWithEllipseInRect(CGRect rect,

    const CGAffineTransform * __nullable transform)

//CGPathCreateWithEllipseInRect

//以矩形四边相切画圆，矩形宽高相等就是园

- (void)createWithEllipseInRect{

    CAShapeLayer *firstLayer = [CAShapeLayer layer];

    firstLayer.path = CGPathCreateWithEllipseInRect(CGRectMake(, , ,), nil);

    firstLayer.fillColor = [UIColor redColor].CGColor;

    firstLayer.strokeColor = [UIColor blueColor].CGColor;

    firstLayer.lineWidth = ;

    [self.showView.layer addSublayer:firstLayer];

    self.pathRect.text = @"路径frame(70, 50, 60,100)";

}

效果图

3、圆角矩形

CG_EXTERN CGPathRef  CGPathCreateWithRoundedRect(CGRect rect,

    CGFloat cornerWidth, CGFloat cornerHeight,

    const CGAffineTransform * __nullable transform)

CG_EXTERN void CGPathAddRoundedRect(CGMutablePathRef cg_nullable path,

    const CGAffineTransform * __nullable transform, CGRect rect,

    CGFloat cornerWidth, CGFloat cornerHeight)

//CGPathCreateWithRoundedRect

- (void)createWithRoundedRect{

    CAShapeLayer *firstLayer = [CAShapeLayer layer];

    firstLayer.path = CGPathCreateWithRoundedRect(CGRectMake(, , , ), , , nil);

    firstLayer.fillColor = [UIColor redColor].CGColor;

    firstLayer.strokeColor = [UIColor blueColor].CGColor;

    firstLayer.lineWidth = ;

    [self.showView.layer addSublayer:firstLayer];

    self.pathRect.text = @"路径frame(10,50 , 180, 100)";

}

//CGPathAddRoundedRect

- (void)addRoundedRect{

    CAShapeLayer *firstLayer = [CAShapeLayer layer];

    CGMutablePathRef wavePath = CGPathCreateMutable();

    CGPathAddRoundedRect(wavePath, nil, CGRectMake(, , , ), ,);

    firstLayer.path = wavePath;

    firstLayer.fillColor = [UIColor redColor].CGColor;

    firstLayer.strokeColor = [UIColor blueColor].CGColor;

    firstLayer.lineWidth = ;

    [self.showView.layer addSublayer:firstLayer];

    self.pathRect.text = @"路径frame(10,50 , 180, 100)";

}

效果图

4、虚线路径

CG_EXTERN CGPathRef __nullable CGPathCreateCopyByDashingPath(

    CGPathRef cg_nullable path, const CGAffineTransform * __nullable transform,

    CGFloat phase, const CGFloat * __nullable lengths, size_t count)

//CGPathCreateCopyByDashingPath

-(void)createCopyByDashingPath{

    CAShapeLayer *firstLayer = [CAShapeLayer layer];

    CGMutablePathRef wavePath = CGPathCreateMutable();

    CGPathAddRoundedRect(wavePath, nil, CGRectMake(, , , ), ,);

    CGFloat floats[] = {,,,};//可以自行设置多组

    firstLayer.path = CGPathCreateCopyByDashingPath(wavePath, nil, , floats, );

    firstLayer.fillColor = [UIColor redColor].CGColor;

    firstLayer.strokeColor = [UIColor blueColor].CGColor;

    firstLayer.lineWidth = ;

    [self.showView.layer addSublayer:firstLayer];

    self.pathRect.text = @"路径frame(10,50 , 180, 100)";

}

效果图

5、斜线

CG_EXTERN CGPathRef __nullable CGPathCreateCopyByStrokingPath(

    CGPathRef cg_nullable path, const CGAffineTransform * __nullable transform,

    CGFloat lineWidth, CGLineCap lineCap,

    CGLineJoin lineJoin, CGFloat miterLimit)

//CGPathCreateCopyByStrokingPath

//typedef CF_ENUM(int32_t, CGLineJoin) {

//    kCGLineJoinMiter,   锋利

//    kCGLineJoinRound,   圆角

//    kCGLineJoinBevel    贝塞尔风格

//};

//

//typedef CF_ENUM(int32_t, CGLineCap) {

//    kCGLineCapButt,     线冒精确到点（默认）

//    kCGLineCapRound,    线冒为半径为线宽一半的圆弧

//    kCGLineCapSquare    线冒尖锐的过渡

//};

- (void)createCopyByStrokingPath{

    CAShapeLayer *firstLayer = [CAShapeLayer layer];

    CGMutablePathRef wavePath = CGPathCreateMutable();

    CGPathMoveToPoint(wavePath, nil, ,*.);

    CGPathAddLineToPoint(wavePath, nil, self.showView.frame.size.width- , *0.5);

    CGPathAddLineToPoint(wavePath, nil, self.showView.frame.size.width-, );

    CGPathAddLineToPoint(wavePath, nil, , );

    firstLayer.path = CGPathCreateCopyByStrokingPath(wavePath, nil,, kCGLineCapRound, kCGLineJoinRound, );

    firstLayer.fillColor = [UIColor redColor].CGColor;

    firstLayer.strokeColor = [UIColor blueColor].CGColor;

    [self.showView.layer addSublayer:firstLayer];

}

效果图

6、其它划线

- (void)linePath{

    CAShapeLayer *firstLayer = [CAShapeLayer layer];

    CGMutablePathRef wavePath = CGPathCreateMutable();

//    确定路径起点

    CGPathMoveToPoint(wavePath, nil, ,);

//    画一条直线

    CGPathAddLineToPoint(wavePath, nil,  , );

//    添加一段二次贝塞尔曲线

    CGPathAddQuadCurveToPoint(wavePath, nil, , , , );

//    添加一段三次贝塞尔曲线

    CGPathAddCurveToPoint(wavePath, nil, , , , , , );

//    追加一个矩形

    CGPathAddRect(wavePath, nil, CGRectMake(, , , ));

//    追加一组矩形

    CGRect rects[] = {CGRectMake(, , , ),CGRectMake(, , , )};

    CGPathAddRects(wavePath, nil, rects, );

//    追加一组线条

    CGPoint points[] = {CGPointMake(, ),CGPointMake(, ),CGPointMake(, )};

    CGPathAddLines(wavePath, nil, points, );

//    追加一个椭圆

    CGPathAddEllipseInRect(wavePath, nil, CGRectMake(, , , ));

//    追加一段圆弧

    CGPathAddRelativeArc(wavePath, nil, , , , , M_PI_4);

//    追加一段圆弧

    CGPathAddArc(wavePath, nil, , , , , M_PI, NO);

//    追加一段相切弧

    CGPathAddArcToPoint(wavePath, nil, , , , , );

    firstLayer.path = wavePath;

    firstLayer.fillColor = [UIColor redColor].CGColor;

    firstLayer.strokeColor = [UIColor blueColor].CGColor;

    [self.showView.layer addSublayer:firstLayer];

}

效果图

巴特西

iOS之CGPath的应用（二）

最新文章

热门文章