是否有可能减少文本之间的差距,当把在一个UILabel多行?我们可以设置框架,字体大小和行数。我想减少标签中两行之间的差距。
当前回答
在Swift中,作为一个函数,灵感来自DarkDust
// Usage: setTextWithLineSpacing(myEpicUILabel,text:"Hello",lineSpacing:20)
func setTextWithLineSpacing(label:UILabel,text:String,lineSpacing:CGFloat)
{
let paragraphStyle = NSMutableParagraphStyle()
paragraphStyle.lineSpacing = lineSpacing
let attrString = NSMutableAttributedString(string: text)
attrString.addAttribute(NSAttributedString.Key.paragraphStyle, value:paragraphStyle, range:NSMakeRange(0, attrString.length))
label.attributedText = attrString
}
其他回答
在ios6中有另一个答案,那就是在标签上设置attributedText,使用NSAttributedString和适当的段落样式。关于NSAttributedString的行高,请参阅堆栈溢出答案:
NSAttributedString行高,对吗?
在Xcode 6中,你可以在storyboard中这样做:
我做了这个简单的扩展,非常适合我:
extension UILabel {
func setLineHeight(lineHeight: CGFloat) {
let paragraphStyle = NSMutableParagraphStyle()
paragraphStyle.lineSpacing = 1.0
paragraphStyle.lineHeightMultiple = lineHeight
paragraphStyle.alignment = self.textAlignment
let attrString = NSMutableAttributedString()
if (self.attributedText != nil) {
attrString.append( self.attributedText!)
} else {
attrString.append( NSMutableAttributedString(string: self.text!))
attrString.addAttribute(NSAttributedStringKey.font, value: self.font, range: NSMakeRange(0, attrString.length))
}
attrString.addAttribute(NSAttributedStringKey.paragraphStyle, value:paragraphStyle, range:NSMakeRange(0, attrString.length))
self.attributedText = attrString
}
}
复制到一个文件中,这样你就可以像这样使用它了
myLabel.setLineHeight(0.7)
这是我在swift中的解决方案。子类应该同时适用于attributedText和text属性以及characterSpacing + lineSpacing。如果设置了新字符串或attributedString,则保留空格。
open class UHBCustomLabel : UILabel {
@IBInspectable open var characterSpacing:CGFloat = 1 {
didSet {
updateWithSpacing()
}
}
@IBInspectable open var lines_spacing:CGFloat = -1 {
didSet {
updateWithSpacing()
}
}
open override var text: String? {
set {
super.text = newValue
updateWithSpacing()
}
get {
return super.text
}
}
open override var attributedText: NSAttributedString? {
set {
super.attributedText = newValue
updateWithSpacing()
}
get {
return super.attributedText
}
}
func updateWithSpacing() {
let attributedString = self.attributedText == nil ? NSMutableAttributedString(string: self.text ?? "") : NSMutableAttributedString(attributedString: attributedText!)
attributedString.addAttribute(NSKernAttributeName, value: self.characterSpacing, range: NSRange(location: 0, length: attributedString.length))
if lines_spacing >= 0 {
let paragraphStyle = NSMutableParagraphStyle()
paragraphStyle.lineSpacing = lines_spacing
paragraphStyle.alignment = textAlignment
attributedString.addAttribute(NSParagraphStyleAttributeName, value:paragraphStyle, range:NSMakeRange(0, attributedString.length))
}
super.attributedText = attributedString
}
}
在Swift中,作为一个函数,灵感来自DarkDust
// Usage: setTextWithLineSpacing(myEpicUILabel,text:"Hello",lineSpacing:20)
func setTextWithLineSpacing(label:UILabel,text:String,lineSpacing:CGFloat)
{
let paragraphStyle = NSMutableParagraphStyle()
paragraphStyle.lineSpacing = lineSpacing
let attrString = NSMutableAttributedString(string: text)
attrString.addAttribute(NSAttributedString.Key.paragraphStyle, value:paragraphStyle, range:NSMakeRange(0, attrString.length))
label.attributedText = attrString
}