ios android 图文混排,iOS通过NSMutableAttributedString实现图文混排

private lazy var textField: UITextView = {

let fontSize: CGFloat = 16

let tv = UITextView()

tv.font = UIFont.systemFont(ofSize: fontSize)

tv.textAlignment = .center

var text = NSMutableAttributedString(string: "一二三四五上山打老虎")

for _ in 1...100 {

let att = NSTextAttachment()

att.image = UIImage(named: "1f601")

att.bounds = CGRect(x: 0, y: tv.font?.descender ?? 0, width: fontSize , height: fontSize)

text.append(NSAttributedString(attachment: att))

}

tv.attributedText = text

return tv

}()

关于对齐的问题tv.font?.descender是关键，具体可参考：http://stackoverflow.com/questions/26105803/center-nstextattachment-image-next-to-single-line-uilabel

这个场景实际就是聊天中的文字+表情混排。

另外要说明下，UITextField(单行输入框)和NSTextAttachment有兼容问题，暂时 没法用这种方法实现。