ios - 如何适配 CAShapeLayer

Question

我正在开发 iPhone 应用程序，我使用下一个代码来圆我层的两个角:

CAShapeLayer *backgroundMaskLayer = [CAShapeLayer layer];
UIBezierPath *backgroungMaskPath = [UIBezierPath
                                    bezierPathWithRoundedRect:self.layer.bounds
                                    byRoundingCorners:UIRectCornerTopLeft | UIRectCornerTopRight
                                    cornerRadii:CGSizeMake(10.0, 10.0)];

self.clipsToBounds = NO;
backgroundMaskLayer.frame = self.layer.bounds;
backgroundMaskLayer.path = backgroungMaskPath.CGPath;
backgroundMaskLayer.lineWidth = 2.0;
backgroundMaskLayer.strokeColor = [UIColor whiteColor].CGColor;
backgroundMaskLayer.fillColor = [UIColor whiteColor].CGColor;

[self.inputBackView.layer addSublayer:backgroundMaskLayer];

但圆圈层不会在不同设备上与其他层缩放。

我试过这个:

backgroundMaskLayer.contentsScale = [UIScreen mainScreen].scale;
backgroundMaskLayer.rasterizationScale = [UIScreen mainScreen].scale;
backgroundMaskLayer.shouldRasterize = YES;

还有这个:

- (void)layoutSubviews {
  mylayer.frame = self.bounds;
  }

此外，我尝试了不同的约束组合，但我仍然在 iPhone 6 上得到这个(在 iPhone 5 上，它已经足够了):

xib 文件中的蓝色是我的层，我在其上施加了我的 CAShapeLayer * backgroundMaskLayer(白色)。

我该如何解决？

Answer 1

将您的layoutSubviews方法更新为:

- (void)layoutSubviews
{
    [super layoutSubviews];
    UIBezierPath *backgroungMaskPath = [UIBezierPath
                                        bezierPathWithRoundedRect:self.bounds
                                        byRoundingCorners:UIRectCornerTopLeft | UIRectCornerTopRight
                                        cornerRadii:CGSizeMake(10.0, 10.0)];
    backgroundMaskLayer.path = backgroungMaskPath.CGPath;

}