UILabel的NSTextAlignment.Justified不起作用

Question

我试图证明我的UILabel文本,但它不起作用.

我的宣言UIView:

descriptionUIView = UIView(frame: CGRect(x: 0, y: 0, width: self.view.frame.width, height: self.view.frame.height)

我的宣言UILabel:

bottleDescriptionLabel = UILabel(frame: CGRect(x: widthMargin, y: bottleDescriptionTitleLabel.frame.maxY + heightMargin, width: self.view.frame.width - (2 * widthMargin), height: heightBottleDescription - (2 * heightMargin)))
bottleDescriptionLabel.font = UIFont(name: "AvenirNext-Regular", size: 16)
bottleDescriptionLabel.text = bottleDescriptionString
bottleDescriptionLabel.lineBreakMode = NSLineBreakMode.ByWordWrapping
bottleDescriptionLabel.textAlignment = NSTextAlignment.Justified
bottleDescriptionLabel.numberOfLines = 0

它看起来像这样:

我不知道还有什么可以NSTextAlignment.Justified用来证明我的文本.我应该用UITextView吗？

Answer 1

您必须结合NSAttributedString创建NSMutableParagraphStyle,以便将文本显示为对齐.重要的是将NSBaselineOffsetAttributedName设置为0.0.

以下是如何将所有内容放在一起的示例:

let sampleText = "Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum."

let paragraphStyle = NSMutableParagraphStyle()
paragraphStyle.alignment = NSTextAlignment.Justified

let attributedString = NSAttributedString(string: sampleText,
    attributes: [
        NSParagraphStyleAttributeName: paragraphStyle,
        NSBaselineOffsetAttributeName: NSNumber(float: 0)
    ])

let label = UILabel()
label.attributedText = attributedString
label.numberOfLines = 0
label.frame = CGRectMake(0, 0, 400, 400)


let view = UIView()
view.frame = CGRectMake(0, 0, 400, 400)
view.addSubview(label)

NSBaselineOffsetAttributedName的积分:https://stackoverflow.com/a/19445666/2494219