当放在多行中时，是否可以减少文本之间的间隙UILabel？我们可以设置框架、字体大小和行数。我想减少该标签中两行之间的差距。
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257701 次
22 回答
418
在 Xcode 6 中，您可以在情节提要中执行此操作：
于 2014-09-25T17:16:59.227 回答
283
我想为这个答案添加一些新的东西，所以我感觉不那么糟糕......这是一个Swift的答案：
import Cocoa
let paragraphStyle = NSMutableParagraphStyle()
paragraphStyle.lineSpacing = 40
let attrString = NSMutableAttributedString(string: "Swift Answer")
attrString.addAttribute(.paragraphStyle, value:paragraphStyle, range:NSMakeRange(0, attrString.length))
var tableViewCell = NSTableCellView()
tableViewCell.textField.attributedStringValue = attrString
“简短的回答：你不能。要更改文本行之间的间距，你必须继承 UILabel 并滚动你自己的 drawTextInRect，或者创建多个标签。”
请参阅：设置 UILabel 行距
这是一个非常古老的答案，其他人已经添加了新的更好的方法来处理这个问题。请参阅下面提供的最新答案。
于 2011-04-01T13:00:47.560 回答
109
从 iOS 6 开始，您可以为 UILabel 设置属性字符串。检查以下内容：
NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithString:label.text];
NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];
paragraphStyle.lineSpacing = spacing;
[attributedString addAttribute:NSParagraphStyleAttributeName value:paragraphStyle range:NSMakeRange(0, label.text.length)];
label.attributedText = attributedString;
于 2013-04-17T10:01:49.150 回答
83
此处所述的解决方案对我不起作用。我发现使用 iOS 6 NSAttributeString 的方法略有不同：
myLabel.numberOfLines = 0;
NSString* string = @"String with line one. \n Line two. \n Line three.";
NSMutableParagraphStyle *style = [[NSMutableParagraphStyle alloc] init];
style.minimumLineHeight = 30.f;
style.maximumLineHeight = 30.f;
NSDictionary *attributtes = @{NSParagraphStyleAttributeName : style,};
myLabel.attributedText = [[NSAttributedString alloc] initWithString:string
attributes:attributtes];
[myLabel sizeToFit];
于 2013-10-08T21:19:29.323 回答
39
从界面生成器（故事板/XIB）：
以编程方式：
斯威夫特 4
使用标签扩展
extension UILabel {
// Pass value for any one of both parameters and see result
func setLineSpacing(lineSpacing: CGFloat = 0.0, lineHeightMultiple: CGFloat = 0.0) {
guard let labelText = self.text else { return }
let paragraphStyle = NSMutableParagraphStyle()
paragraphStyle.lineSpacing = lineSpacing
paragraphStyle.lineHeightMultiple = lineHeightMultiple
let attributedString:NSMutableAttributedString
if let labelattributedText = self.attributedText {
attributedString = NSMutableAttributedString(attributedString: labelattributedText)
} else {
attributedString = NSMutableAttributedString(string: labelText)
}
// Line spacing attribute
attributedString.addAttribute(NSAttributedStringKey.paragraphStyle, value:paragraphStyle, range:NSMakeRange(0, attributedString.length))
self.attributedText = attributedString
}
}
现在呼叫分机功能
let label = UILabel()
let stringValue = "How to\ncontrol\nthe\nline spacing\nin UILabel"
// Pass value for any one argument - lineSpacing or lineHeightMultiple
label.setLineSpacing(lineSpacing: 2.0) . // try values 1.0 to 5.0
// or try lineHeightMultiple
//label.setLineSpacing(lineHeightMultiple = 2.0) // try values 0.5 to 2.0
或使用标签实例（只需复制并执行此代码即可查看结果）
let label = UILabel()
let stringValue = "How to\ncontrol\nthe\nline spacing\nin UILabel"
let attrString = NSMutableAttributedString(string: stringValue)
var style = NSMutableParagraphStyle()
style.lineSpacing = 24 // change line spacing between paragraph like 36 or 48
style.minimumLineHeight = 20 // change line spacing between each line like 30 or 40
// Line spacing attribute
attrString.addAttribute(NSAttributedStringKey.paragraphStyle, value: style, range: NSRange(location: 0, length: stringValue.characters.count))
// Character spacing attribute
attrString.addAttribute(NSAttributedStringKey.kern, value: 2, range: NSMakeRange(0, attrString.length))
label.attributedText = attrString
斯威夫特 3
let label = UILabel()
let stringValue = "How to\ncontrol\nthe\nline spacing\nin UILabel"
let attrString = NSMutableAttributedString(string: stringValue)
var style = NSMutableParagraphStyle()
style.lineSpacing = 24 // change line spacing between paragraph like 36 or 48
style.minimumLineHeight = 20 // change line spacing between each line like 30 or 40
attrString.addAttribute(NSParagraphStyleAttributeName, value: style, range: NSRange(location: 0, length: stringValue.characters.count))
label.attributedText = attrString
于 2017-06-02T09:39:06.127 回答
37
I've made this simple extension that works very well for me:
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
}
}
Copy this in a file, so then you can use it like this
myLabel.setLineHeight(0.7)
于 2016-01-29T18:42:54.277 回答
19
现在在 iOS 6 中有一个替代答案，即在标签上设置属性文本，使用具有适当段落样式的 NSAttributedString。有关使用 NSAttributedString 的行高的详细信息，请参阅此堆栈溢出答案：
于 2012-10-10T19:41:31.953 回答
16
这是一个子类 UILabel 具有 line-height 属性的类：https ://github.com/LemonCake/MSLabel
于 2012-05-16T12:01:05.197 回答
14
在 Swift 中作为函数，受 DarkDust 启发
// 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
}
于 2015-07-26T21:34:26.420 回答
11
根据@Mike 的回答，减少lineHeightMultiple是关键。下面的例子，它对我很有效：
NSString* text = label.text;
CGFloat textWidth = [text sizeWithAttributes:@{NSFontAttributeName: label.font}].width;
if (textWidth > label.frame.size.width) {
NSMutableParagraphStyle *paragraph = [[NSMutableParagraphStyle alloc] init];
paragraph.alignment = NSTextAlignmentCenter;
paragraph.lineSpacing = 1.0f;
paragraph.lineHeightMultiple = 0.75; // Reduce this value !!!
NSMutableAttributedString* attrText = [[NSMutableAttributedString alloc] initWithString:text];
[attrText addAttribute:NSParagraphStyleAttributeName value:paragraph range:NSMakeRange(0, text.length)];
label.attributedText = attrText;
}
于 2015-11-16T10:45:09.423 回答
8
SWIFT 3用于更轻松地设置行间空间的有用扩展:)
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
}
}
}
于 2016-12-07T15:15:10.293 回答
5
我找到了一种可以设置实际行高（不是一个因素）的方法，它甚至可以在 Interface Builder 中实时呈现。只需按照以下说明进行操作。代码是用Swift 4编写的。
步骤#1：创建一个名为DesignableLabel.swift并插入以下代码的文件：
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 aUILabel放入 Storyboard/XIB 并将其类设置为DesignableLabel. 等待您的项目构建（构建必须成功！）。
第 3 步：现在您应该在属性窗格中看到一个名为“行高”的新属性。只需设置您喜欢的值，您应该立即看到结果！
于 2017-09-14T14:25:17.977 回答
3
这是 UILabel 的一个子类，它设置lineHeightMultiple并确保固有高度足够大而不会截断文本。
@IBDesignable
class Label: UILabel {
override var intrinsicContentSize: CGSize {
var size = super.intrinsicContentSize
let padding = (1.0 - lineHeightMultiple) * font.pointSize
size.height += padding
return size
}
override var text: String? {
didSet {
updateAttributedText()
}
}
@IBInspectable var lineHeightMultiple: CGFloat = 1.0 {
didSet {
updateAttributedText()
}
}
private func updateAttributedText() {
let paragraphStyle = NSMutableParagraphStyle()
paragraphStyle.lineHeightMultiple = lineHeightMultiple
attributedText = NSAttributedString(string: text ?? "", attributes: [
.font: font,
.paragraphStyle: paragraphStyle,
.foregroundColor: textColor
])
invalidateIntrinsicContentSize()
}
}
于 2018-02-16T22:20:26.613 回答
1
在斯威夫特 2.0...
添加扩展：
extension UIView {
func attributesWithLineHeight(font: String, color: UIColor, fontSize: CGFloat, kern: Double, lineHeightMultiple: CGFloat) -> [String: NSObject] {
let titleParagraphStyle = NSMutableParagraphStyle()
titleParagraphStyle.lineHeightMultiple = lineHeightMultiple
let attribute = [
NSForegroundColorAttributeName: color,
NSKernAttributeName: kern,
NSFontAttributeName : UIFont(name: font, size: fontSize)!,
NSParagraphStyleAttributeName: titleParagraphStyle
]
return attribute
}
}
现在，只需将您的 UILabel 设置为属性文本：
self.label.attributedText = NSMutableAttributedString(string: "SwiftExample", attributes: attributesWithLineHeight("SourceSans-Regular", color: UIColor.whiteColor(), fontSize: 20, kern: 2.0, lineHeightMultiple: 0.5))
显然，我添加了一堆你可能不需要的参数。玩转——随意重写方法——我在一堆不同的答案上寻找这个，所以我想我会发布整个扩展，以防它帮助那里的人......-rab
于 2016-03-16T08:20:37.883 回答
1
这应该有助于它。然后，您可以将标签分配给情节提要中的此自定义类，并直接在属性中使用它的参数：
open class SpacingLabel : UILabel {
@IBInspectable open var lineHeight:CGFloat = 1 {
didSet {
let paragraphStyle = NSMutableParagraphStyle()
paragraphStyle.lineSpacing = 1.0
paragraphStyle.lineHeightMultiple = self.lineHeight
paragraphStyle.alignment = self.textAlignment
let attrString = 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
}
}
}
于 2017-11-03T14:57:13.600 回答
1
另一个答案...如果您以编程方式传递字符串，则需要传递属性字符串而不是常规字符串并更改其样式。（iOS10）
NSMutableAttributedString * attrString = [[NSMutableAttributedString alloc] initWithString:@"Your \nregular \nstring"];
NSMutableParagraphStyle *style = [[NSMutableParagraphStyle alloc] init];
[style setLineSpacing:4];
[attrString addAttribute:NSParagraphStyleAttributeName
value:style
range:NSMakeRange(0, attrString.length)];
_label.attributedText = attrString;
于 2017-01-24T21:47:58.833 回答
1
Swift3 - 在 UITextView 或 UILabel 扩展中，添加这个函数：
如果您已经在视图中使用了属性字符串（而不是覆盖它们），我添加了一些代码来保留当前的属性文本。
func setLineHeight(_ lineHeight: CGFloat) {
guard let text = self.text, let font = self.font else { return }
let paragraphStyle = NSMutableParagraphStyle()
paragraphStyle.lineSpacing = 1.0
paragraphStyle.lineHeightMultiple = lineHeight
paragraphStyle.alignment = self.textAlignment
var attrString:NSMutableAttributedString
if let attributed = self.attributedText {
attrString = NSMutableAttributedString(attributedString: attributed)
} else {
attrString = NSMutableAttributedString(string: text)
attrString.addAttribute(NSFontAttributeName, value: font, range: NSMakeRange(0, attrString.length))
}
attrString.addAttribute(NSParagraphStyleAttributeName, value:paragraphStyle, range:NSMakeRange(0, attrString.length))
self.attributedText = attrString
}
于 2016-12-13T21:58:17.457 回答
1
Swift 4 标签扩展。在传递给函数之前创建 NSMutableAttributedString，以防属性文本需要额外的属性。
extension UILabel {
func setLineHeightMultiple(to height: CGFloat, withAttributedText attributedText: NSMutableAttributedString) {
let paragraphStyle = NSMutableParagraphStyle()
paragraphStyle.lineSpacing = 1.0
paragraphStyle.lineHeightMultiple = height
paragraphStyle.alignment = textAlignment
attributedText.addAttribute(.paragraphStyle, value: paragraphStyle, range: NSRange(location: 0, length: attributedText.length - 1))
self.attributedText = attributedText
}
}
于 2018-02-27T12:02:13.960 回答
1
斯威夫特 3 扩展：
import UIKit
extension UILabel {
func setTextWithLineSpacing(text: String, lineHeightMultiply: CGFloat = 1.3) {
let paragraphStyle = NSMutableParagraphStyle()
paragraphStyle.lineHeightMultiple = lineHeightMultiply
paragraphStyle.alignment = .center
let attributedString = NSMutableAttributedString(string: text)
attributedString.addAttribute(NSParagraphStyleAttributeName, value: paragraphStyle, range: NSRange(location: 0, length: attributedString.length))
self.attributedText = attributedString
}
}
于 2017-02-01T10:34:12.940 回答
0
这段代码对我有用（肯定是 ios 7 和 ios 8）。
_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;
于 2015-07-20T14:24:32.697 回答
0
这是我的快速解决方案。子类应该适用于属性文本和文本属性以及 characterSpacing + lineSpacing。如果设置了新字符串或属性字符串，它会保留间距。
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
}
}
于 2018-08-29T19:48:03.203 回答
-5
作为快速肮脏智能简单的解决方法：
对于没有太多行的 UILabel，您可以改用 stackViews。
- 为每一行写一个新标签。
- 将它们嵌入到 StackView 中。（选择两个标签-->Editor-->Embed In -->StackView
- 将 StackView调整
Spacing为您想要的数量
一定要垂直堆叠它们。此解决方案也适用于自定义字体。
于 2016-07-28T17:52:23.107 回答