在UIVisualEffect视图上创建透明孔

时间:2015-08-30 00:26:51

标签: ios objective-c uivisualeffectview

我正在尝试在UIVisualEffectView上创建透明孔视图。我正在按照here给出的解决方案。我附上了我在here上工作的示例代码。我正在尝试创建一个透明视图,其框架取自模糊视图后面的图像视图。谁能告诉我这里我做错了什么?

2 个答案:

答案 0 :(得分:12)

您可以使用UIBezierPath创建所需的蒙版。

blurView.layer.mask = ({
    CGRect roundedRect = self.bounds;
    roundedRect.origin.x = roundedRect.size.width / 4.0f;
    roundedRect.origin.y = roundedRect.size.height / 4.0f;
    roundedRect.size.width /= 2.0f;
    roundedRect.size.height /= 2.0f;

    CGFloat cornerRadius = roundedRect.size.height / 2.0f;

    UIBezierPath *path = [UIBezierPath bezierPathWithRect:self.bounds];
    UIBezierPath *croppedPath = [UIBezierPath bezierPathWithRoundedRect:roundedRect cornerRadius:cornerRadius];
    [path appendPath:croppedPath];
    [path setUsesEvenOddFillRule:YES];

    CAShapeLayer *mask = [CAShapeLayer layer];
    mask.path = path.CGPath;
    mask.fillRule = kCAFillRuleEvenOdd;
    mask;
});

答案 1 :(得分:0)

针对懒人的解决方案的Swift 5版本:)

while read -r -a line
do
    IFS='= ' read -r -a array <<< "$line"
    "${array[0]}"+="${array[1]}"
done < file.txt