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感谢：http://blog.csdn.net/crayondeng/article/details/11093689
使用UIBezierPath类可以创建基于矢量的路径，这个类在UIKit中。此类是Core Graphics框架关于path的一个封装。使用此类可以定义简单的形状，如椭圆或者矩形，或者有多个直线和曲线段组成的形状。
// Only override drawRect: if you perform custom drawing. // An empty implementation adversely affects performance during animation. - (void)drawRect:(CGRect)rect { UIColor *color = [UIColor redColor]; [color set]; //设置线条颜色 UIBezierPath* aPath = [UIBezierPath bezierPath]; aPath.lineWidth = 5.0; aPath.lineCapStyle = kCGLineCapRound; //线条拐角 aPath.lineJoinStyle = kCGLineCapRound; //终点处理 // Set the starting point of the shape. [aPath moveToPoint:CGPointMake(100.0, 0.0)]; // Draw the lines [aPath addLineToPoint:CGPointMake(200.0, 40.0)]; [aPath addLineToPoint:CGPointMake(160, 140)]; [aPath addLineToPoint:CGPointMake(40.0, 140)]; [aPath addLineToPoint:CGPointMake(0.0, 40.0)]; [aPath closePath];//第五条线通过调用closePath方法得到的 [aPath stroke];//Draws line 根据坐标点连线 }
+ (UIBezierPath *)bezierPathWithRect:(CGRect)rect
demo代码：
- (void)drawRect:(CGRect)rect { UIColor *color = [UIColor redColor]; [color set]; //设置线条颜色 UIBezierPath* aPath = [UIBezierPath bezierPathWithRect:CGRectMake(20, 20, 100, 50)]; aPath.lineWidth = 5.0; aPath.lineCapStyle = kCGLineCapRound; //线条拐角 aPath.lineJoinStyle = kCGLineCapRound; //终点处理 [aPath stroke]; }
+ (UIBezierPath *)bezierPathWithOvalInRect:(CGRect)rect
+ (UIBezierPath *)bezierPathWithArcCenter:(CGPoint)center radius:(CGFloat)radius startAngle:(CGFloat)startAngle endAngle:(CGFloat)endAngle clockwise:(BOOL)clockwise Parameters center Specifies the center point of the circle (in the current coordinate system) used to define the arc. radius Specifies the radius of the circle used to define the arc. startAngle Specifies the starting angle of the arc (measured in radians). endAngle Specifies the end angle of the arc (measured in radians). clockwise The direction in which to draw the arc. Return Value A new path object with the specified arc.
#define pi 3.14159265359 #define DEGREES_TO_RADIANS(degrees) ((pi * degrees)/ 180)
- (void)drawRect:(CGRect)rect { UIColor *color = [UIColor redColor]; [color set]; //设置线条颜色 UIBezierPath* aPath = [UIBezierPath bezierPathWithArcCenter:CGPointMake(150, 150) radius:75 startAngle:0 endAngle:DEGREES_TO_RADIANS(135) clockwise:YES]; aPath.lineWidth = 5.0; aPath.lineCapStyle = kCGLineCapRound; //线条拐角 aPath.lineJoinStyle = kCGLineCapRound; //终点处理 [aPath stroke]; }
- (void)addQuadCurveToPoint:(CGPoint)endPoint controlPoint:(CGPoint)controlPoint Parameters endPoint The end point of the curve. controlPoint The control point of the curve.
demo代码：
- (void)drawRect:(CGRect)rect { UIColor *color = [UIColor redColor]; [color set]; //设置线条颜色 UIBezierPath* aPath = [UIBezierPath bezierPath]; aPath.lineWidth = 5.0; aPath.lineCapStyle = kCGLineCapRound; //线条拐角 aPath.lineJoinStyle = kCGLineCapRound; //终点处理 [aPath moveToPoint:CGPointMake(20, 100)]; [aPath addQuadCurveToPoint:CGPointMake(120, 100) controlPoint:CGPointMake(70, 0)]; [aPath stroke]; }
- (void)addCurveToPoint:(CGPoint)endPoint controlPoint1:(CGPoint)controlPoint1 controlPoint2:(CGPoint)controlPoint2 Parameters endPoint The end point of the curve. controlPoint1 The first control point to use when computing the curve. controlPoint2 The second control point to use when computing the curve.
demo代码：
- (void)drawRect:(CGRect)rect { UIColor *color = [UIColor redColor]; [color set]; //设置线条颜色 UIBezierPath* aPath = [UIBezierPath bezierPath]; aPath.lineWidth = 5.0; aPath.lineCapStyle = kCGLineCapRound; //线条拐角 aPath.lineJoinStyle = kCGLineCapRound; //终点处理 [aPath moveToPoint:CGPointMake(20, 50)]; [aPath addCurveToPoint:CGPointMake(200, 50) controlPoint1:CGPointMake(110, 0) controlPoint2:CGPointMake(110, 100)]; [aPath stroke]; }
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原文地址：http://www.cnblogs.com/yulang314/p/5122370.html
