ios - 如何在 ios 中将纹理设置为 CALayer？

Question

如何将纹理(如下所示)图像应用于具有不透明度级别的 calayer，例如组合纹理和 calayer 图像？

Sample texture

Answer 1

你可以用这个

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

编辑尝试在现有层上添加子层。它会让您知道如何做到这一点。

//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];

你也可以尝试设置 mask

       [self.view.layer setMask:fillLayer];