先看效果图

github源码 github.com/daomoer/YYS… 初始化一个UITextView

let textView = UITextView(frame: CGRect(x:30, y:200, width:UIScreen.main.bounds.width-60, height:200))
textView.delegate = self
self.view.addSubview(textView)
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UITextView属性设置

//字体颜色
textView.textColor = UIColor.purple
//内容部分链接样式
textView.linkTextAttributes = [NSAttributedStringKey.foregroundColor.rawValue: UIColor.orange,NSAttributedStringKey.underlineStyle.rawValue: NSUnderlineStyle.styleSingle.rawValue]
//边框
textView.layer.borderColor = UIColor.red.cgColor
textView.layer.borderWidth = 1.5
//字体大小
textView.font = UIFont.systemFont(ofSize: 16)
//内容可编辑
textView.isEditable = false
//内容可选
textView.isSelectable = true
//边框圆角设置
textView.layer.masksToBounds = true
textView.layer.cornerRadius = 5.0
//自适应高度
textView.autoresizingMask = UIViewAutoresizing.flexibleHeight
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设置内容文本富文本样式显示

//设置富文本
let attributeString:NSMutableAttributedString=NSMutableAttributedString(string: "这是一条测试textview的字符串数据，欢迎访问 http://www.baidu.com")
//设置字体颜色
attributeString.addAttribute(NSAttributedStringKey.foregroundColor, value: UIColor.green, range: NSMakeRange(0, attributeString.length))
//文本所有字符字体HelveticaNeue-Bold，16号
attributeString.addAttribute(NSAttributedStringKey.font, value: UIFont(name: "HelveticaNeue-Bold", size: 16)!, range: NSMakeRange(0, attributeString.length))
//文本0开始5个字符字体HelveticaNeue-Bold，16号
attributeString.addAttribute(NSAttributedStringKey.font, value: UIFont(name: "HelveticaNeue-Bold", size: 26)!, range: NSMakeRange(0, 5))
//设置字体颜色
attributeString.addAttribute(NSAttributedStringKey.foregroundColor, value: UIColor.white, range: NSMakeRange(0, 3))
//设置文字背景颜色
attributeString.addAttribute(NSAttributedStringKey.backgroundColor, value: UIColor.orange, range: NSMakeRange(3, 3))
//赋值富文本
textView.attributedText = attributeString
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设置文本内容对齐方式

textView.textAlignment = NSTextAlignment.center
/*textView.textAlignment = NSTextAlignment.lefttextView.textAlignment = NSTextAlignment.center*/
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给文中的特殊部分加上链接，比如手机号，网址邮箱等(需要注意的是如果使用了给特殊部分加上连接要先使内容不可编辑textView.isEditable = false)

textView.dataDetectorTypes = UIDataDetectorTypes.link
/*textView.dataDetectorTypes = UIDataDetectorTypes.linktextView.dataDetectorTypes = UIDataDetectorTypes.addresstextView.dataDetectorTypes = UIDataDetectorTypes.calendarEventtextView.dataDetectorTypes = UIDataDetectorTypes.shipmentTrackingNumbertextView.dataDetectorTypes = UIDataDetectorTypes.flightNumbertextView.dataDetectorTypes = UIDataDetectorTypes.lookupSuggestiontextView.dataDetectorTypes = UIDataDetectorTypes.phoneNumber*/
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设置键盘类型

textView.keyboardType = UIKeyboardType.asciiCapable
/*textView.keyboardType = UIKeyboardType.defaulttextView.keyboardType = UIKeyboardType.numbersAndPunctuationtextView.keyboardType = UIKeyboardType.URLtextView.keyboardType = UIKeyboardType.numberPadtextView.keyboardType = UIKeyboardType.phonePadtextView.keyboardType = UIKeyboardType.namePhonePadtextView.keyboardType = UIKeyboardType.emailAddresstextView.keyboardType = UIKeyboardType.decimalPadtextView.keyboardType = UIKeyboardType.twitter*/
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键盘返回类型

textView.returnKeyType = UIReturnKeyType.continue
/*textView.returnKeyType = UIReturnKeyType.defaulttextView.returnKeyType = UIReturnKeyType.gotextView.returnKeyType = UIReturnKeyType.googletextView.returnKeyType = UIReturnKeyType.jointextView.returnKeyType = UIReturnKeyType.nexttextView.returnKeyType = UIReturnKeyType.routetextView.returnKeyType = UIReturnKeyType.searchtextView.returnKeyType = UIReturnKeyType.sendtextView.returnKeyType = UIReturnKeyType.yahootextView.returnKeyType = UIReturnKeyType.donetextView.returnKeyType = UIReturnKeyType.emergencyCalltextView.returnKeyType = UIReturnKeyType.continue*/
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当选择内容文本的时候，顶部会出现对选择内容操作的segment，可以选择自定义segment

let mail = UIMenuItem(title: "邮件", action: #selector(ViewController.onMail))
let weixin = UIMenuItem(title: "微信", action: #selector(ViewController.onWeiXin))
let menu = UIMenuController()
menu.menuItems = [mail,weixin]
}
@objc func onMail(){}@objc func onWeiXin(){}
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下面为UITextView的各个代理方法

// 开始编辑文本的时候触发该方法
func textViewDidBeginEditing(_ textView: UITextView) {}
// 结束编辑的时候触发该方法
func textViewDidEndEditing(_ textView: UITextView) {}//如果返回false，文本视图不能编辑
func textViewShouldBeginEditing(_ textView: UITextView) -> Bool {return true
}//如果返回false，表示编辑结束之后，文本视图不可再编辑
func textViewShouldEndEditing(_ textView: UITextView) -> Bool {return true
}//文本视图内容改变时，触发本方法,如果是回车符号，则textView释放第一响应值，返回false
func textView(_ textView: UITextView, shouldChangeTextIn range: NSRange, replacementText text: String) -> Bool {if (text ==  "\n") {textView.resignFirstResponder()return false;}return true
}//文本视图改变后触发本代理方法
func textViewDidChange(_ textView: UITextView) {}
//文本视图 改变选择内容，触发本代理方法
func textViewDidChangeSelection(_ textView: UITextView) {}
//链接在文本中显示。当链接被点击的时候，会触发本代理方法
func textView(_ textView: UITextView, shouldInteractWith URL: URL, in characterRange: NSRange) -> Bool{return true
}
//文本视图允许提供文本附件，文本附件点击时，会触发本代理方法   return true
func textView(_ textView: UITextView, shouldInteractWith textAttachment: NSTextAttachment, in characterRange: NSRange, interaction: UITextItemInteraction) -> Bool {return true
}
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