UIBezierPath没有绘制平滑曲线 [英] UIBezierPath not drawing a smooth curve

问题描述

我正在使用UIBezierPath进行绘图，我已经在触摸事件上编写了代码并且它的工作正常，但是我的曲线并不平滑，当我移动手指并绘制一些曲线时，它们并不平滑。

I am using UIBezierPath for drawing, and I have written the code on touch events and its working fine, but my curves are not smooth, when I am move my finger around and draw some curve, they are not smooth.

- (void)drawRect:(CGRect)rect
{    
    [[UIColor redColor] setStroke];
    for (UIBezierPath *_path in pathArray) 
    [_path strokeWithBlendMode:kCGBlendModeNormal alpha:1.0];
}

#pragma mark - Touch Methods
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
    myPath=[[UIBezierPath alloc]init];
    myPath.lineWidth=5;
    myPath.lineCapStyle = kCGLineCapRound;
    myPath.flatness = 0.0;   

    UITouch *mytouch=[[touches allObjects] objectAtIndex:0];
    [myPath moveToPoint:[mytouch locationInView:self]];
    [pathArray addObject:myPath];

}
-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{   
    UITouch *mytouch=[[touches allObjects] objectAtIndex:0];
    [myPath addLineToPoint:[mytouch locationInView:self]];

    [self setNeedsDisplay];    
}

这是图片

在如果你看到字母a和d，你会看到曲线不平滑。我该怎么做才能获得平滑的曲线？

In the above image if you see the letters a and d you will see that the curve is not smooth. What should I do, to get a smooth curve?

推荐答案

只需使用此行即可。它将解决您的问题 myPath.miterLimit = -10; 。

Just use this line. it will solve your problem myPath.miterLimit=-10;.

如果您需要任何东西，请更改值它需要浮动值

Change the value if you need to any thing it takes float value

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