iOS 图文混排 ，Swift版

// 0> 图片附件

let attachment = NSTextAttachment()

attachment.image = #imageLiteral(resourceName: "d_aini")

let height = label.font.lineHeight

attachment.bounds = CGRect(x: 0, y: -4, width: height, height: height)

// 1> 属性文本

let imageStr = AttributedString(attachment: attachment)

// 2> 可变的图文字符串 - NSMutableAttributedString

let attrStrM = NSMutableAttributedString(string: "我")

attrStrM.append(imageStr)

attrStrM.append(AttributedString(string: "99!"))

// 3> 设置 label

label.attributedText = attrStrM