为什么不创建新行？

Question

我试图将UILabel分为3部分，顶部是标题，第二行是艺术家，第三行是专辑。为什么UILabel没有以三行显示它？

 var ID3 = UILabel(frame: CGRectMake(0,0,200,200))
    ID3.center = CGPointMake(160, 284)
    ID3.textAlignment = NSTextAlignment.Center
    ID3.text = (Title + "\n" + Artist + "\n" + Album)
    self.view.addSubview(ID3)

Answer 1

ID3.numberOfLines = 3

希望有帮助;）此属性的默认值为1，如果将其设置为0，则您将拥有多行标签：）

编辑： 示例游乐场代码：

//: Playground - noun: a place where people can play

import UIKit

let Title = "Lorem ipsum title"
let Artist = "lorem ipsum artist"
let Album = "lorem ipsum album"

var ID3 = UILabel(frame: CGRectMake(0,0,200,200))
ID3.center = CGPointMake(160, 284)
ID3.textAlignment = NSTextAlignment.Center
ID3.text = (Title + "\n" + Artist + "\n" + Album)
ID3.numberOfLines = 3
ID3.backgroundColor = UIColor.redColor()

var view = UIView(frame: CGRectMake(0, 0, 500, 500))
view.backgroundColor = UIColor.whiteColor()

view.addSubview(ID3)