每次使用NSAttributedString的时候, 总会写一大堆臃肿的代码, 一般我们会写到Extension或category中,对String, NSAttributedString进行扩展, 然后调用起来稍微方便一些..

或者你也可以这样进行扩展

extension UILabel {
    convenience init(frame: CGRect = .zero, attributedText: String, textColor: UIColor, font: UIFont, lineSpacing: CGFloat) {
        self.init(frame: frame)
        let paragraphStyle = NSMutableParagraphStyle()
        paragraphStyle.lineSpacing = lineSpacing
        paragraphStyle.lineBreakMode = .byTruncatingTail
        let attrStr = NSAttributedString(string: attributedText, attributes: [NSParagraphStyleAttributeName: paragraphStyle,
                                                                              NSFontAttributeName: font,
                                                                              NSForegroundColorAttributeName: textColor])
        self.attributedText = attrStr
    }
}

或者

        let attr = NSMutableAttributedString(string: content)
        let paragrap = NSParagraphStyle()
        paragrap.lineSpacing = 8.0
        paragrap.alignment = .center
        attr.addAttributes([NSParagraphStyle: paragrap], range: NSMakeRange(0, attr.length))
        attr.addAttributes([NSFontAttributeName: UIFont.systemFont(ofSize: 17)], range: NSMakeRange(0, attr.length))
        let shadow = NSShadow()
        shadow.shadowColor = UIColor.red
        shadow.shadowOffset = CGSize(width: 3, height: 3)
        shadow.shadowBlurRadius = 2.0
        attr.addAttributes([NSShadowAttributeName: NSShadow], range: NSMakeRange(0, attr.length))
        label6.attributedText = attr

这里我对NSAttributedString的所有属性都进行了简单的封装, 让开发者使用起来超方便

项目地址 如果你喜欢的话, 欢迎star

使用方法如下:

// 1. shadow: 阴影设置, 默认为allRange
label1.attributedText = content.toAttributed.shadow {
    $0.shadowColor = UIColor.red
    $0.shadowOffset = CGSize(width: 3, height: 3)
    $0.shadowBlurRadius = 2.0
}.rawValue


// 2. paragraph: 段落设置, 默认为allRange
let attrText2 = content.toAttributed.paragraph {
    $0.alignment = .center
    $0.lineSpacing = 8.0
}.font(UIFont.systemFont(ofSize: 15))
label2.attributedText = attrText2.rawValue
// 这里并且可以直接得到富文本的高度
print(attrText2.getHeight(by: screenW - 20))


// 3. underLine:  下划线设置, 默认为allRange
label3.attributedText = content.toAttributed.underLine(style: [.styleDouble, .patternDot], color: UIColor.red).rawValue

// 4. 字体, 颜色设置
textField.attributedPlaceholder = "Please enter the phone number".toAttributed.font(.systemFont(ofSize: 15))
                                                                 .foregroundColor(.red).rawValue

// 5. 富文本共同设置不同的rangge
label6.attributedText = content.toAttributed
            .underLine(style: [.styleSingle, .patternDot], color: .red, range: NSMakeRange(0, 5))
            .font(.systemFont(ofSize: 18), range: NSMakeRange(5, 5))
            .backgroundColor(.blue, range: NSMakeRange(10, 5))
            .foregroundColor(.purple, range: NSMakeRange(15, 5))
            .baselineOffset(value: 5, range: NSMakeRange(20, 5))
            .obliqueness(angle: 0.5, range: NSMakeRange(25, 5))
            .kern(padding: 0.3, range: NSMakeRange(30, 5))
            .expansion(value: 0.3, range: NSMakeRange(35, 5))
            .stroke(color: .green, width: 3, range: NSMakeRange(40, 5))
            .textEffect(range: NSMakeRange(50, 5))
            .shadow{
                $0.shadowColor = UIColor.red
                $0.shadowOffset = CGSize(width: 3, height: 3)
                $0.shadowBlurRadius = 2.0
            }.rawValue

效果图:

效果图