layer绘制方法

最新推荐文章于 2022-04-01 17:25:18 发布

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最新推荐文章于 2022-04-01 17:25:18 发布

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分类专栏： ios 文章标签： objective-c ios

本文链接：https://blog.youkuaiyun.com/iOSZZZh/article/details/116465897

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//画线
-(CAShapeLayer *)drawLineFromPoint:(CGPoint)p1 toPoint:(CGPoint)p2 width:(CGFloat)w color:(UIColor *)c
{
    CAShapeLayer *layer = [CAShapeLayer layer];
    layer.lineWidth = w;
   // layer.fillColor = c.CGColor;
    layer.strokeColor = c.CGColor;
    
    UIBezierPath *path = [UIBezierPath bezierPath];
    [path moveToPoint:p1];
    [path addLineToPoint:p2];
    layer.path = path.CGPath;
    
    [self.layer addSublayer:layer];
    
    return layer;
}

//画虚线
- (CAShapeLayer*)dashLineFromPoint:(CGPoint)p1 toPoint:(CGPoint)p2 realLinePoint:(CGFloat)realLinePoint dashLinePoint:(CGFloat)dashLinePoint color:(UIColor*)color lineWidth:(CGFloat)lineWidth
{
    //realLinePoint 单位实线长度  dashLinePoint 单位间隙长度
    CAShapeLayer *layer = [self drawLineFromPoint:p1 toPoint:p2 width:lineWidth color:color];
    layer.lineDashPattern = @[[NSNumber numberWithInteger:realLinePoint],[NSNumber numberWithInteger:dashLinePoint]];

    return layer;
}

//渐变
AGradientLayer *topMaskLayer = [[CAGradientLayer alloc]init];
    topMaskLayer.colors = @[(__bridge id)[UIColor yellowColor].CGColor,
                          (__bridge id)[UIColor blueColor].CGColor];
    colorBacklayer.frame = xxx;
    topMaskLayer.startPoint = CGPointMake(0.5, 0);
    topMaskLayer.endPoint = CGPointMake(0.5, 1);
    [self.layer addSublayer:topMaskLayer];