[英]lineSpacing property inside UILabel doesn't work as expected
I am trying to create a custom UILabel
class which will allow me to increase the line spacing on a UILabel. 我正在尝试创建一个自定义
UILabel
类,这将允许我增加UILabel上的行距。 I know you can do this in IB with an attributed text string, however it doesn't work if you are using custom fonts. 我知道您可以在IB中使用带有属性的文本字符串来执行此操作,但是如果您使用自定义字体,则无法使用。 Here is my class code:
这是我的课程代码:
import UIKit
@IBDesignable
class SpacingLabel: UILabel
{
@IBInspectable var lineSpacing: CGFloat = 10.0
override func awakeFromNib()
{
self.renderText()
}
override func prepareForInterfaceBuilder()
{
super.prepareForInterfaceBuilder()
self.renderText()
}
func renderText()
{
var attrString = NSMutableAttributedString(string:self.text!)
if font != nil
{
NSMutableParagraphStyle.defaultParagraphStyle().mutableCopy()
var paragraphStyle = NSMutableParagraphStyle.defaultParagraphStyle().mutableCopy() as! NSMutableParagraphStyle
paragraphStyle.textAlignment = self.textAlignment
paragraphStyle.lineSpacing = self.lineSpacing
paragraphStyle.paragraphSpacing = self.lineSpacing
attrString.addAttributes([NSFontAttributeName : self.font!, NSParagraphStyleAttributeName : paragraphStyle], range: NSMakeRange(0, attrString.length))
self.attributedText = attrString
}
self.needsUpdateConstraints()
}
}
This is how it renders in IB (Storyboard): 这是它在IB(故事板)中的呈现方式:
And here's how it renders in the simulator: 这是它在模拟器中的渲染方式:
I've tried adding minimumLineHeight
and/or maximumLineHeight
properties, but these just seem to mess it up in other ways... 我尝试添加
minimumLineHeight
和/或maximumLineHeight
属性,但是这些似乎以其他方式将其弄乱了……
So... It turned out that the property lineSpacing
is somehow clashing with a possible private variable/property within UILabel
. 所以...事实证明,属性
lineSpacing
与UILabel
可能的私有变量/属性发生了冲突。 I renamed my property to leading
and now it works perfectly. 我将自己的媒体资源重命名为
leading
,现在可以正常使用了。
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