写一个不规则矩形，四个角度可以各不相同_qml 4个角半径不同的矩形-优快云博客

本文链接：https://blog.youkuaiyun.com/m0_37934882/article/details/107956800

本文介绍如何利用贝塞尔曲线技术绘制出角度各异的不规则矩形，详细阐述了这一图形绘制过程。

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其实就是用贝塞尔曲线画出来的

- (void)drawRect:(CGRect)rect{
    [super drawRect:rect];
    
    CGFloat minX = CGRectGetMinX(rect);
    CGFloat minY = CGRectGetMinY(rect);
    CGFloat maxX = CGRectGetMaxX(rect);
    CGFloat maxY = CGRectGetMaxY(rect);
    
    CGFloat topLeftCorner = 10;
    CGFloat topRightCorner = 20;
    CGFloat bottomLeftCorner = 30;
    CGFloat bottomRightCorner = 60;
    
    UIBezierPath *path = [UIBezierPath bezierPath];
    [path moveToPoint:CGPointMake(minX, minY + topLeftCorner)];
    [path addQuadCurveToPoint:CGPointMake(minX + topLeftCorner, minY) controlPoint:CGPointMake(minX, minY)];
    [path addLineToPoint:CGPointMake(maxX - topRightCorner , minY)];
    [path addQuadCurveToPoint:CGPointMake(maxX, minY + topRightCorner) controlPoint:CGPointMake(maxX, minY)];
    [path addLineToPoint:CGPointMake(maxX ,maxY - bottomRightCorner)];
    [path addQuadCurveToPoint:CGPointMake(maxX - bottomRightCorner, maxY) controlPoint:CGPointMake(maxX, maxY)];
    [path addLineToPoint:CGPointMake(minX + bottomLeftCorner, maxY)];
    [path addQuadCurveToPoint:CGPointMake(minX, maxY - bottomLeftCorner) controlPoint:CGPointMake(minX, maxY)];
    [path closePath];
    
    CAShapeLayer *shapeLayer = [CAShapeLayer layer];
    shapeLayer.fillColor = [UIColor orangeColor].CGColor;
    shapeLayer.path = path.CGPath;
    
    NSArray *colors = @[(__bridge id)[UIColor blueColor].CGColor,(__bridge id)[UIColor redColor].CGColor];
    CAGradientLayer * gradientLayer = [CAGradientLayer layer];
    gradientLayer.frame = rect;
    gradientLayer.startPoint = CGPointMake(0, 0);
    gradientLayer.endPoint = CGPointMake(1, 1);
    gradientLayer.colors = colors;
    [self.layer addSublayer:gradientLayer];
    gradientLayer.mask = shapeLayer;
    
}