如何安裝CAShapeLayer

Question

我正在開發iPhone應用程序，在這里我使用下一個代碼來環繞圖層的兩個角：

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];

但是帶圓圈的圖層無法與其他設備上的其他圖層縮放。

我已經試過了：

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

和這個：

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

ve tried to make different combinations of constraints, but i仍然在iPhone 6上得到它（在iPhone 5上就足夠了）：

藍色是我在xib文件中的圖層，在上面施加了我的CAShapeLayer * backgroundMaskLayer（白色）。

我該如何解決？

Answer 1

將您的layoutSubviews方法更新為：

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

}