织梦做淘宝客网站,高密市网站建设,wordpress发不了邮件,高校校园网站建设与运行前言#xff1a;AttributedString是Apple推出的可以实现单个字符或字符范围带相应属性的字符串。属性提供了一些文本特性#xff0c;可以让文本展示的样式更加丰富。在日常开发过程中#xff0c;我通常用于同一个Label中包含不同的字体大小或字体颜色的样式编写中。
使用举…前言AttributedString是Apple推出的可以实现单个字符或字符范围带相应属性的字符串。属性提供了一些文本特性可以让文本展示的样式更加丰富。在日常开发过程中我通常用于同一个Label中包含不同的字体大小或字体颜色的样式编写中。
使用举例
需求需要设置一个红底白字的Label
attributedLabel UILabel()let contentStr NSString(string: AttributedString)
let attStr NSMutableAttributedString(string: contentStr as String)
attStr.addAttribute(NSAttributedString.Key.font, value: UIFont.systemFont(ofSize: 20, weight: .medium), range: NSRange(location: 0, length: contentStr.length))
attStr.addAttribute(NSAttributedString.Key.foregroundColor, value: UIColor.white, range: NSRange(location: 0, length: contentStr.length))
attStr.addAttribute(NSAttributedString.Key.backgroundColor, value: UIColor.red, range: NSRange(location: 0, length: contentStr.length))
attributedLabel.attributedText attStr样式展示
文本属性介绍
从上方代码可以看出文本的属性是通过设置文本字体文本颜色文本背景颜色所实现的。所以下面来一一列举一些常用的文本属性及展示效果。
设置文本字体大小和粗细
attStr.addAttribute(NSAttributedString.Key.font, value: UIFont.systemFont(ofSize: 20, weight: .medium), range: NSRange(location: 0, length: contentStr.length))效果
设置文本颜色
attStr.addAttribute(NSAttributedString.Key.foregroundColor, value: UIColor.blue, range: NSRange(location: 0, length: contentStr.length))效果
设置背景颜色
attStr.addAttribute(NSAttributedString.Key.backgroundColor, value: UIColor.red, range: NSRange(location: 0, length: contentStr.length))效果
设置下划线
attStr.addAttribute(NSAttributedString.Key.underlineStyle, value: NSUnderlineStyle.single.rawValue, range: NSRange(location: 0, length: contentStr.length))效果
设置下划线颜色
默认下划线颜色与文本颜色相同
attStr.addAttribute(NSAttributedString.Key.underlineColor, value: UIColor.green, range: NSRange(location: 0, length: contentStr.length))效果
拼接文本 先设置好相关文本属性然后将其相互连接
let contentStr1 NSString(string: Attributed)
let attStr1 NSMutableAttributedString(string: contentStr1 as String)
attStr1.addAttribute(NSAttributedString.Key.font, value: UIFont.systemFont(ofSize: 20, weight: .medium), range: NSRange(location: 0, length: contentStr1.length))
attStr1.addAttribute(NSAttributedString.Key.foregroundColor, value: UIColor.blue, range: NSRange(location: 0, length: contentStr1.length))let contentStr2 NSString(string: String)
let attStr2 NSMutableAttributedString(string: contentStr2 as String)
attStr2.addAttribute(NSAttributedString.Key.font, value: UIFont.systemFont(ofSize: 12, weight: .medium), range: NSRange(location: 0, length: contentStr2.length))
attStr2.addAttribute(NSAttributedString.Key.foregroundColor, value: UIColor.green, range: NSRange(location: 0, length: contentStr2.length))attStr1.append(attStr2)attributedLabel.attributedText attStr1效果
Attributes创建及使用
attributes可以一次性创建多个属性attributes是一个字典 需求创建一个红底白字的Label
let contentStr NSString(string: AttributedString)
let attStr NSMutableAttributedString(string: contentStr as String)
attStr.addAttributes([NSAttributedString.Key.font: UIFont.systemFont(ofSize: 20, weight: .regular),NSAttributedString.Key.foregroundColor : UIColor.white,NSAttributedString.Key.backgroundColor : UIColor.red], range: NSRange(location: 0, length: contentStr.length))attributedLabel.attributedText attStr效果
常用属性方法整合
我将常用的一些文本属性进行整合了一个类
import Foundation
import UIKitpublic struct ZUAttributedString {public enum Font:String {case thin PingFangSC-Thincase light PingFangSC-Lightcase medium PingFangSC-Mediumcase regular PingFangSC-Regular}public enum Line{case nonecase midLinecase underLine}public static func attributeString(content:String,font: UIFont,alignment:NSTextAlignment? NSTextAlignment.center,textColor:UIColor?,backgroundColor: UIColor? nil,line:Line .none,lineSpacing:CGFloat 0) - NSMutableAttributedString{let contentStr NSString(string: content)let attStr NSMutableAttributedString(string: contentStr as String)//set colorif let textColor textColor {attStr.addAttribute(NSAttributedString.Key.foregroundColor, value: textColor, range: NSRange(location: 0, length: contentStr.length))}if let backgroundColor backgroundColor {attStr.addAttribute(NSAttributedString.Key.backgroundColor, value: backgroundColor, range: NSRange(location: 0, length: contentStr.length))}let style NSMutableParagraphStyle()if let align alignment {style.alignment align} else {style.alignment NSTextAlignment.center}if lineSpacing 0{style.lineSpacing lineSpacing}attStr.addAttribute(NSAttributedString.Key.paragraphStyle, value: style, range: NSRange(location: 0, length: contentStr.length))attStr.addAttribute(NSAttributedString.Key.font, value: font, range: NSRange(location: 0, length: contentStr.length))switch line{case .none:breakcase .midLine:attStr.addAttribute(NSAttributedString.Key.strikethroughStyle, value: NSUnderlineStyle.single.rawValue, range: NSMakeRange(0, attStr.length))breakcase .underLine:attStr.addAttribute(NSAttributedString.Key.underlineStyle, value: NSUnderlineStyle.single.rawValue, range: NSMakeRange(0, attStr.length))break}return attStr}public static func attributeString(content:String,font:ZUAttributedString.Font,size:CGFloat,alignment:NSTextAlignment? NSTextAlignment.center,textColor:UIColor?,backgroundColor:UIColor? nil,line:Line .none,maximumLineHeight:CGFloat) - NSMutableAttributedString{let attStr NSMutableAttributedString(string: content)//set colorif let textColor textColor {attStr.addAttribute(NSAttributedString.Key.foregroundColor, value: textColor, range: NSRange(location: 0, length: content.count))}if let backgroundColor backgroundColor {attStr.addAttribute(NSAttributedString.Key.backgroundColor, value: backgroundColor, range: NSRange(location: 0, length: content.count))}let style NSMutableParagraphStyle()if let align alignment {style.alignment align} else {style.alignment NSTextAlignment.center}attStr.addAttribute(NSAttributedString.Key.paragraphStyle, value: style, range: NSRange(location: 0, length: content.count))//set fontswitch font {case .thin:let font UIFont(name: ZUAttributedString.Font.thin.rawValue, size: size) ?? UIFont.systemFont(ofSize: size)attStr.addAttribute(NSAttributedString.Key.font, value: font, range: NSRange(location: 0, length: content.count))case .light:let font UIFont(name: ZUAttributedString.Font.light.rawValue, size: size) ?? UIFont.systemFont(ofSize: size)attStr.addAttribute(NSAttributedString.Key.font, value: font, range: NSRange(location: 0, length: content.count))breakcase .medium:let font UIFont(name: ZUAttributedString.Font.medium.rawValue, size: size) ?? UIFont.systemFont(ofSize: size)attStr.addAttribute(NSAttributedString.Key.font, value: font, range: NSRange(location: 0, length: content.count))breakcase .regular:let font UIFont(name: ZUAttributedString.Font.regular.rawValue, size: size) ?? UIFont.systemFont(ofSize: size)attStr.addAttribute(NSAttributedString.Key.font, value: font, range: NSRange(location: 0, length: content.count))break}switch line{case .none:breakcase .midLine:attStr.addAttribute(NSAttributedString.Key.strikethroughStyle, value: NSUnderlineStyle.single.rawValue, range: NSMakeRange(0, attStr.length))breakcase .underLine:attStr.addAttribute(NSAttributedString.Key.underlineStyle, value: NSUnderlineStyle.single.rawValue, range: NSMakeRange(0, attStr.length))break}let paragraphStyle NSMutableParagraphStyle()paragraphStyle.maximumLineHeight maximumLineHeight// Line spacing attributeattStr.addAttribute(NSAttributedString.Key.paragraphStyle, value:paragraphStyle, range:NSMakeRange(0, attStr.length))return attStr}
}方法使用
let attStr1 ZUAttributedString.attributeString(content: Attributed, font: UIFont.systemFont(ofSize: 20, weight: .regular), textColor: UIColor.green, backgroundColor: nil)
let attStr2 ZUAttributedString.attributeString(content: String, font: UIFont.systemFont(ofSize: 20, weight: .regular), textColor: UIColor.blue, backgroundColor: nil)attStr1.append(attStr2)效果
所以通过方法整合的方式可以更加方便便捷的使用AttributedString并且也可以更好的实现我们目标的文本样式
参考文章
iOS swift 带有attributeString的多行文本label
Swift生成属性文本AttributedString
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