ios - NSMutableAttributedString paragraphStyle 不适用

Question

我已经将 NSMutableAttributedString 添加到 CATextLayer。除了 paragraphStyle 之外的所有属性都适用。有什么想法吗？

感谢您的帮助。

func createTextLayer() {
    let textLayer = CATextLayer()
    textLayer.frame = CGRect(x: view.center.x - 150, y: view.frame.size.height / 2, width: 300, height: 300)

    let layerText = "Lorem ipsum dolor sit amet, consectetur adipiscing elit. Fusce auctor arcu quis velit congue dictum. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Fusce auctor arcu quis velit congue dictum."

    let paragraphStyle = NSMutableParagraphStyle()
    paragraphStyle.firstLineHeadIndent = 10
    paragraphStyle.headIndent = 10
    paragraphStyle.tailIndent = 10
    paragraphStyle.minimumLineHeight = 38
    paragraphStyle.alignment = .center

    let textAttributes: [NSAttributedStringKey : Any] = [
        .font: UIFont(name: "HelveticaNeue-Bold", size: 18)!,
        .foregroundColor: UIColor.white,
        .backgroundColor: UIColor.black,
        .baselineOffset: 10,
        .paragraphStyle: paragraphStyle
        ]

    textLayer.string = NSMutableAttributedString(string: layerText, attributes: textAttributes)
    textLayer.backgroundColor = UIColor.clear.cgColor
    textLayer.isWrapped = true
    textLayer.contentsScale = UIScreen.main.scale
    textView.layer.addSublayer(textLayer)
}

Answer 1

AFAIK CATextLayer 不遵循任何段落样式。您需要一个 UITextView 来显示具有段落样式的文本。

编辑:

我猜你想要

paragraphStyle.tailIndent = -10

负值表示距尾边距的距离。