Swift-富文本封装

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定义字符串

let str = "我不要种田 我要当老板"

修改颜色

        // MARK: - 修改颜色
        let textLabel = UILabel.init(frame: CGRect.init(x: 20, y: 100, width: UIScreen.main.bounds.size.width - 40, height: 30))
        view.addSubview(textLabel)
        textLabel.attributedText = str.hw_toAttribute()
            .hw_color(UIColor.gray)

删除线

        // MARK: - 删除线
        let textLabel2 = UILabel.init(frame: CGRect.init(x: 20, y: 130, width: UIScreen.main.bounds.size.width - 40, height: 30))
        view.addSubview(textLabel2)
        textLabel2.attributedText = str.hw_toAttribute()
            .hw_addMidline(1)
            .hw_midlineColor(UIColor.red)

文字大小

        // MARK: - 文字大小
        let textLabel3 = UILabel.init(frame: CGRect.init(x: 20, y: 160, width: UIScreen.main.bounds.size.width - 40, height: 30))
        textLabel3.textColor = UIColor.red
        view.addSubview(textLabel3)
        textLabel3.attributedText = str.hw_toAttribute()
            .hw_fontSize(25)

字体颜色

        // MARK: - 字体颜色
        let textLabel4 = UILabel.init(frame: CGRect.init(x: 20, y: 190, width: UIScreen.main.bounds.size.width - 40, height: 30))
        view.addSubview(textLabel4)
        textLabel4.attributedText =  str.hw_toAttribute()
            .hw_color(UIColor.red)

背景色

        // MARK: - 背景色
        let textLabel5 = UILabel.init(frame: CGRect.init(x: 20, y: 220, width: UIScreen.main.bounds.size.width - 40, height: 30))
        view.addSubview(textLabel5)
        textLabel5.attributedText =  str.hw_toAttribute()
            .hw_backgroundColor(UIColor.blue)

阴影

        // MARK: - 阴影
        let textLabel6 = UILabel.init(frame: CGRect.init(x: 20, y: 250, width: UIScreen.main.bounds.size.width - 40, height: 30))
        view.addSubview(textLabel6)
        textLabel6.attributedText = str.hw_toAttribute()
            .hw_addShadow()

下划线

        // MARK: - 下划线
        let textLabel7 = UILabel.init(frame: CGRect.init(x: 20, y: 280, width: UIScreen.main.bounds.size.width - 40, height: 30))
        view.addSubview(textLabel7)
        textLabel7.attributedText = str.hw_toAttribute()
            .hw_addUnderLine(.styleSingle)
            .hw_underLineColor(UIColor.yellow)

富文本拼接

        // MARK: - 拼接
        let textLabel8 = UILabel.init(frame: CGRect.init(x: 20, y: 310, width: UIScreen.main.bounds.size.width - 40, height: 30))
        view.addSubview(textLabel8)
        textLabel8.attributedText = str.hw_toAttribute()
            .hw_addUnderLine(.styleSingle)
            .hw_underLineColor(UIColor.yellow).hw_addAttribute("我是拼接的".hw_toAttribute().hw_color(UIColor.red))

实现

import UIKit

public extension NSMutableAttributedString {
    /// 获取范围
    func hw_allRange() -> NSRange {
        return NSMakeRange(0,length)
    }
    /// 添加中划线
    @discardableResult
    func hw_addMidline(_ lineHeght: Int) -> NSMutableAttributedString {
        addAttributes([.strikethroughStyle:lineHeght], range: hw_allRange())
        return self
    }
    /// 中划线颜色
    @discardableResult
    func hw_midlineColor(_ color: UIColor) -> NSMutableAttributedString{
        addAttributes([.strikethroughColor:color], range: hw_allRange())
        return self
    }
    /// 给文字添加描边
    ///
    /// - Parameter width: 描边宽带
    /// - Returns:
    @discardableResult
    func hw_addStroke(_ width: CGFloat) -> NSMutableAttributedString {
        addAttributes([.strokeWidth:width], range: hw_allRange())
        return self
    }
    /// 描边颜色
    @discardableResult
    func hw_strokeColor(_ color: UIColor) -> NSMutableAttributedString { 
        addAttributes([.strokeColor:color], range: hw_allRange())
        return self
    }
    
    /// 添加字间距
    @discardableResult
    func hw_addSpace(_ space: CGFloat) -> NSMutableAttributedString {
        addAttributes([.kern:space], range: hw_allRange())
        return self
    }
    /// 背景色
    @discardableResult
    func hw_backgroundColor(_ color: UIColor) -> NSMutableAttributedString {
        addAttributes([.backgroundColor:color], range: hw_allRange())
        return self
    }
    /// 文字颜色
    @discardableResult
    public func hw_color(_ color: UIColor) -> NSMutableAttributedString {
        addAttributes([.foregroundColor:color], range: hw_allRange())
        return self
    }

    /// 添加下划线
    ///
    /// - Parameter style: <#style description#>
    /// - Returns: <#return value description#>
    @discardableResult
    func hw_addUnderLine(_ style: NSUnderlineStyle) -> NSMutableAttributedString{
        addAttributes([.underlineStyle:style.rawValue], range: hw_allRange())
        return self
    }
    /// 下划线颜色
    @discardableResult
    func hw_underLineColor(_ color: UIColor) -> NSMutableAttributedString{
        addAttributes([.underlineColor:color], range: hw_allRange())
        return self
    }
    
    /// 字体
    @discardableResult
    func hw_font(_ font: UIFont) -> NSMutableAttributedString{
        addAttributes([.font:font], range: hw_allRange())
        return self
    }
    /// 系统字体大小
    @discardableResult
    func hw_fontSize(_ size: CGFloat)->NSMutableAttributedString{
        addAttributes([.font:UIFont.systemFont(ofSize: size)], range: hw_allRange())
        return self
    }
    
    /// 添加行间距
    @discardableResult
    func hw_addLineSpace(_ space: CGFloat) -> NSMutableAttributedString {
        let style = NSMutableParagraphStyle()
        style.lineSpacing = space
        style.lineBreakMode = .byCharWrapping
        addAttribute(.paragraphStyle, value: style, range: hw_allRange())
        return self
    }
    /// 拼接富文本
    @discardableResult
    func hw_addAttribute(_ attribute: NSMutableAttributedString) -> NSMutableAttributedString {
        append(attribute)
        return self
    }
    
    /// 添加阴影
    @discardableResult
    func hw_addShadow(_ shadowOffset:CGSize? = nil ,_ color: UIColor? = nil) -> NSMutableAttributedString {
        let shadow = NSShadow.init()
        shadow.shadowColor = color == nil ? UIColor.black : color!
        shadow.shadowOffset = shadowOffset == nil ? CGSize.init(width: 2, height: 2) : shadowOffset!
        addAttributes([NSAttributedStringKey.shadow: shadow], range: hw_allRange())
        return self
    }
}


public extension String {
    /// 字符串转富文本
    func hw_toAttribute() -> NSMutableAttributedString {
        return NSMutableAttributedString(string: self)
    }
}

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