ios画曲线

画曲线：

- (void)drawRect:(CGRect)rect {
    UIBezierPath *path = [UIBezierPath bezierPath];
    [path moveToPoint:CGPointMake(140, 40)];
    //添加两个控制点 和 终点
    [path addCurveToPoint:CGPointMake(40, 180) controlPoint1:CGPointMake(40, 40) controlPoint2:CGPointMake(140, 180)];
    
    [path addCurveToPoint:CGPointMake(140, 320) controlPoint1:CGPointMake(140, 180) controlPoint2:CGPointMake(40, 320)];
    
    [[UIColor redColor]setStroke];
    [path stroke];

//绘制矩形

    UIBezierPath *rectPath = [UIBezierPath bezierPathWithRect:CGRectMake(50, 50, 200, 80)];
    rectPath.lineWidth = 5;
    [[UIColor greenColor] setStroke];
    [rectPath stroke];
    ```

//绘制圆角矩形

UIBezierPath *roundedRect = [UIBezierPath bezierPathWithRoundedRect:CGRectMake(50, 150, 200, 80) cornerRadius:20];
[roundedRect stroke];

    
//绘制椭圆

UIBezierPath *oval = [UIBezierPath bezierPathWithOvalInRect:CGRectMake(50, 250, 200, 80)];
[oval stroke];

}