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
下面是一个子类UILabel具有行高属性的类:https://github.com/LemonCake/MSLabel
其他回答
这段代码适用于我(ios 7和ios 8肯定是如此)。
_label.numberOfLines=2;
_label.textColor=[UIColor whiteColor];
NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];
paragraphStyle.lineHeightMultiple=0.5;
paragraphStyle.alignment = NSTextAlignmentCenter;
paragraphStyle.lineSpacing = 1.0;
NSDictionary *nameAttributes=@{
NSParagraphStyleAttributeName : paragraphStyle,
NSBaselineOffsetAttributeName:@2.0
};
NSAttributedString *string=[[NSAttributedString alloc] initWithString:@"22m\nago" attributes:nameAttributes];
_label.attributedText=string;
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)
SWIFT 3有用的扩展设置行间的空间更容易:)
extension UILabel
{
func setLineHeight(lineHeight: CGFloat)
{
let text = self.text
if let text = text
{
let attributeString = NSMutableAttributedString(string: text)
let style = NSMutableParagraphStyle()
style.lineSpacing = lineHeight
attributeString.addAttribute(NSParagraphStyleAttributeName,
value: style,
range: NSMakeRange(0, text.characters.count))
self.attributedText = attributeString
}
}
}
我找到了一种方法,你可以设置真实的行高(不是一个因素),它甚至在界面生成器中渲染。按照下面的说明做就可以了。代码是用Swift 4编写的。
步骤#1:创建一个名为DesignableLabel.swift的文件,并插入以下代码:
import UIKit
@IBDesignable
class DesignableLabel: UILabel {
@IBInspectable var lineHeight: CGFloat = 20 {
didSet {
let paragraphStyle = NSMutableParagraphStyle()
paragraphStyle.minimumLineHeight = lineHeight
paragraphStyle.maximumLineHeight = lineHeight
paragraphStyle.alignment = self.textAlignment
let attrString = NSMutableAttributedString(string: text!)
attrString.addAttribute(NSAttributedStringKey.font, value: font, range: NSRange(location: 0, length: attrString.length))
attrString.addAttribute(NSAttributedStringKey.paragraphStyle, value: paragraphStyle, range: NSRange(location: 0, length: attrString.length))
attributedText = attrString
}
}
}
步骤#2:将UILabel放入Storyboard/XIB中,并将其类设置为DesignableLabel。等待项目构建完成(构建必须成功!)。
步骤3:现在你应该在属性窗格中看到一个名为“Line Height”的新属性。只需设置您喜欢的值,您应该立即看到结果!
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?