将 UILabel 高度调整为文本 [英] Adjust UILabel height to text

问题描述

我有一些标签，我想根据文本调整它们的高度，这是我现在为此编写的代码

I have some labels which I want to adjust their height to the text, this is the code I wrote for this now

func heightForView(text:String, font:UIFont, width:CGFloat) -> CGFloat{
    let label:UILabel = UILabel(frame: CGRectMake(0, 0, width, CGFloat.max))
    label.numberOfLines = 0
    label.lineBreakMode = NSLineBreakMode.ByWordWrapping
    label.font = font
    label.text = text

    label.sizeToFit()
    return label.frame.height
}

问题不在这段代码中，所以我的修复在于问题本身.它可能对其他人仍然有用！

The issue was not in this piece of code, so my fix is in the question itself. It might still be useful for others!

推荐答案

我刚刚把它放在了一个操场上，它对我有用.

I've just put this in a playground and it works for me.

针对 Swift 4.0 进行了更新

import UIKit

 func heightForView(text:String, font:UIFont, width:CGFloat) -> CGFloat{
    let label:UILabel = UILabel(frame: CGRectMake(0, 0, width, CGFloat.greatestFiniteMagnitude))
    label.numberOfLines = 0
    label.lineBreakMode = NSLineBreakMode.byWordWrapping
    label.font = font
    label.text = text

    label.sizeToFit()
    return label.frame.height
}

let font = UIFont(name: "Helvetica", size: 20.0)

var height = heightForView("This is just a load of text", font: font, width: 100.0)

Swift 3:

func heightForView(text:String, font:UIFont, width:CGFloat) -> CGFloat{
    let label:UILabel = UILabel(frame: CGRect(x: 0, y: 0, width: width, height: CGFloat.greatestFiniteMagnitude))
    label.numberOfLines = 0
    label.lineBreakMode = NSLineBreakMode.byWordWrapping
    label.font = font
    label.text = text
    label.sizeToFit()

    return label.frame.height
}

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