在Interface Builder中的UILabel上更改字符间距

问题描述

是否可以使用Interface Builder在UILabel文本上更改字符间距(轨迹)?如果没有，是否有办法在已经使用属性文本创建的现有UILabel上以编程方式进行此操作?

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

现在最终使用它来获取现有的属性文本并进行修改以增加字符间距:

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

迅速3:

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

使用NSRange代替NSMakeRange在Swift 3中有效.

Using NSRange instead of NSMakeRange works in Swift 3.

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