Question

我想进行自定义轮次UIImageView并在故事板中显示。

我接下来做了：

@IBDesignable
class RoundedImageView: UIImageView {
    override init(image: UIImage?) {
        super.init(image: image)
        super.layer.cornerRadius = super.frame.size.height / 2
        self.layer.cornerRadius = self.frame.size.height / 2    
    }

    override init(frame: CGRect) {
        super.init(frame: frame)
        super.layer.cornerRadius = super.frame.size.height / 2
        self.layer.cornerRadius = self.frame.size.height / 2
    }

    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
        super.layer.cornerRadius = super.frame.size.height / 2
        self.layer.cornerRadius = self.frame.size.height / 2
    }
}

我在storyboard中的imageView是选中的RoundedImageView类。但在故事板中，它仍然显示为矩形。我怎么才能意识到这一点？当我运行代码时，它是圆形的。感谢

Answer 1

您应该在应用layouts后设置半径。

@IBDesignable
class RoundedImageView: UIImageView {
    override init(image: UIImage?) {
        super.init(image: image)
    }

    override init(frame: CGRect) {
        super.init(frame: frame)
    }

    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
    }

    override func layoutSubviews() {
        super.layoutSubviews()
        self.layer.cornerRadius = self.frame.size.height / 2
        self.clipsToBounds = true
    }
}

如何使自定义舍入UIImageView子类？

1 个答案: