iOS 8 - 在Interface Builder中更改UILabel上的字符间距

问题描述

无论如何使用Interface Builder更改UILabel文本的字符间距（轨道）？如果没有，有没有办法在已经使用属性文本创建的现有UILabel上以编程方式执行此操作？

Is there anyway to change the character spacing (track) on UILabel text using Interface Builder? If not, is there a way to do it programmatically on an existing UILabel that was already created with attributed text?

推荐答案

结束现在使用它来获取现有的属性文本并修改以添加字符间距：

Ended up using this for now to get existing attributed text and modify to add character spacing:

let attributedString = discoveryTitle.attributedText as NSMutableAttributedString
attributedString.addAttribute(NSKernAttributeName, value: 1.0, range: NSMakeRange(0, attributedString.length))
discoveryTitle.attributedText = attributedString

Swift 3：

let attributedString = NSMutableAttributedString(string: discoveryTitle.text)
attributedString.addAttribute(NSKernAttributeName, value: CGFloat(1.0), range: NSRange(location: 0, length: attributedString.length))
discoveryTitle.attributedText = attributedString

在Swift 3中使用NSRange代替NSMakeRange。

Using NSRange instead of NSMakeRange works in Swift 3.

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