缩进UILabel的第二行（swift）

Question

var testLabel = UILabel(frame: CGRectMake(8,0,tableView.frame.width-8,100))
let testDesc = "dsfdddfdsfdsfsdfdsfdsfdsfdsfdsfsdfdsfsdfsdfdsfdsfdsfdsfdsfdsfdsfdsfdsfdsfdsfdsfdsf"
var labelString = indexString + ".    " + testDesc
testLabel.text = labelString
testLabel.lineBreakMode = .ByWordWrapping // or NSLineBreakMode.ByWordWrapping
testLabel.numberOfLines = 0
retCell.addSubview(testLabel)

我的输出：

1.    ksajdkasdsajdksajdksajd
asjdkjassadkasldkalsdklsakdl

如何使我的输出如下：

1.    asdasdasdasdasdasdasds
      djaskdjsadjksadasjdjas

Answer 1

以下是我使用的代码

let paragraph = NSMutableParagraphStyle()
paragraph.firstLineHeadIndent = 0
paragraph.headIndent = 8 //You can change this to whatever indent you want

let mutString = NSAttributedString(
    string: "this is a test but I need this to be long so it flows onto multiple lines so I will keep going",
    attributes: [NSAttributedStringKey.paragraphStyle: paragraph]
)

mainLabel.attributedText = mutString