如何在iOS中将纹理设置为CALayer？

问题描述

如何将纹理（如下所示）图像应用于具有不透明度级别（如结合纹理和calayer图像）的calayer？

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您可以使用此

  UIImage * yourImage = [UIImage imageNamed：@ yourTextureImage]; 
 self.yourView.layer.contents =（__bridge id）yourImage.CGImage; 
  

编辑尝试在现有层上添加此子层。

  //它将绘制一些圆
 int radius = 30.0; 
 UIBezierPath * path = [UIBezierPath bezierPathWithRoundedRect：CGRectMake（0，0，20.0，20.0）cornerRadius：0]; 
 UIBezierPath * circlePath = [UIBezierPath bezierPathWithRoundedRect：CGRectMake（0，0，2.0 * radius，2.0 * radius）cornerRadius：radius]; 
 [路径appendPath：circlePath]; 
 [路径setUsesEvenOddFillRule：YES]; 
 
 CAShapeLayer * fillLayer = [CAShapeLayer层]; 
 fillLayer.path = path.CGPath; 
 fillLayer.fillRule = kCAFillRuleEvenOdd; 
 fillLayer.fillColor = [UIColor blackColor] .CGColor; 
 fillLayer.opacity = 0.7; 
 [self.view.layer addSublayer：fillLayer]; 
  

您也可以尝试设置遮罩

  [self.view.layer setMask：fillLayer]; 
  

How texture(like below) image can be applied to calayer with opacity levels like combining texture and calayer image?

Sample texture

解决方案

You can use this

UIImage *yourImage = [UIImage imageNamed:@"yourTextureImage"];
self.yourView.layer.contents = (__bridge id) yourImage.CGImage;

EDIT Try this add sublayer on existing layer.It will give you idea how to do that.

//It will draw some circle
int radius = 30.0;
    UIBezierPath *path = [UIBezierPath bezierPathWithRoundedRect:CGRectMake(0, 0, 20.0, 20.0) cornerRadius:0];
    UIBezierPath *circlePath = [UIBezierPath bezierPathWithRoundedRect:CGRectMake(0, 0, 2.0*radius, 2.0*radius) cornerRadius:radius];
    [path appendPath:circlePath];
    [path setUsesEvenOddFillRule:YES];

    CAShapeLayer *fillLayer = [CAShapeLayer layer];
    fillLayer.path = path.CGPath;
    fillLayer.fillRule = kCAFillRuleEvenOdd;
    fillLayer.fillColor = [UIColor blackColor].CGColor;
    fillLayer.opacity = 0.7;
    [self.view.layer addSublayer:fillLayer];

You can also try setting mask

       [self.view.layer setMask:fillLayer];

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