TextEditorDemo

swift：textEditorDemo一个简单的富文本编辑器

一个简单的富文本编辑器

(IPhone 5s Xcode 6.3 swift 1.2)

实现并解决了一些基本功能：

更改字体大小，粗体，下划线，斜体字。并进行了数据的存储更多请查看网友StringX的文章：http://www.jianshu.com/p/ab5326850e74/comments/327660#comment-327660
在TextView中添加照片，以及照片存储
实现键盘隐藏和弹出
实现默认提示文字效果：点击进行编辑时提示文字自动消失
解决改变文字属性，TextView自动滑到顶部问题
让TextView滑到光标所在点
利用自动布局实现点击按钮底部工具栏隐藏到右端 ps:没有动画效果。。
简单封装了提示文字的功能更多请查看网友johnlui的开源项目：https://github.com/johnlui/SwiftNotice
设置点击隐藏导航栏，设置滑动隐藏导航栏

重要说明：

这个Demo还隐藏了一些BUG。如果你解决了希望能共享，谢谢。
导入的两个framework是用于选取照片，以及拍照的
联系方式:
邮箱：lfb.cd@qq.com
还有我的微博号:lfb

项目地址：github地址

1. 更改字体：

@H_502_45@//更改字体大小： self.text.typingAttributes[NSFontAttributeName] = UIFont.systemFontOfSize((CGFloat)(self.fontSize)) //下划线： self.text.typingAttributes[NSUnderlineStyleAttributeName] = 1 //粗体： self.text.typingAttributes[NSFontAttributeName] = UIFont.boldSystemFontOfSize((CGFloat)(self.fontSize)) //斜体： text.typingAttributes[NSObliquenessAttributeName] = 0.5

2. 插入图片：

@H_502_45@/* //选取照片 */ @IBAction func photeSelect(sender: AnyObject) { self.text.resignFirstResponder() var sheet:UIActionSheet if(UIImagePickerController.isSourceTypeAvailable(UIImagePickerControllerSourceType.Camera)){ sheet = UIActionSheet(title: nil,delegate: self,cancelButtonTitle: "取消",destructiveButtonTitle: nil,otherButtonTitles: "从相册选择","拍照") }else{ sheet = UIActionSheet(title:nil,otherButtonTitles: "从相册选择") } sheet.showInView(self.view) } func actionSheet(actionSheet: UIActionSheet,clickedButtonAtIndex buttonIndex: Int) { var sourceType = UIImagePickerControllerSourceType.PhotoLibrary if(buttonIndex != 0){ if(buttonIndex==1){ //相册 sourceType = UIImagePickerControllerSourceType.PhotoLibrary self.text.resignFirstResponder() }else{ sourceType = UIImagePickerControllerSourceType.Camera } let imagePickerController:UIImagePickerController = UIImagePickerController() imagePickerController.delegate = self imagePickerController.allowsEditing = true //true为拍照、选择完进入图片编辑模式 imagePickerController.sourceType = sourceType self.presentViewController(imagePickerController,animated: true,completion: { }) } } func imagePickerController(picker: UIImagePickerController,didFinishPickingMediaWithInfo info: [NSObject : AnyObject]){ var string:NSMutableAttributedString string = NSMutableAttributedString(attributedString: self.text.attributedText) var img = info[UIImagePickerControllerEditedImage] as! UIImage img = self.scaleImage(img) var textAttachment= NSTextAttachment() textAttachment.image = img var textAttachmentString = NSAttributedString(attachment: textAttachment) var countString:Int = count(self.text.text) as Int string.insertAttributedString(textAttachmentString,atIndex: countString) //可以用这个函数实现插入到光标所在点 ps:如果你实现了希望能共享 text.attributedText = string /* // */ //string.appendAttributedString(textAttachmentString) picker.dismissViewControllerAnimated(true,completion: nil) } func scaleImage(image:UIImage)->UIImage{ UIGraphicsBeginImageContext(CGSizeMake(self.view.bounds.size.width,image.size.height*(self.view.bounds.size.width/image.size.width))) image.drawInRect(CGRectMake(0,0,self.view.bounds.size.width,image.size.height*(self.view.bounds.size.width/image.size.width))) var scaledimage = UIGraphicsGetImageFromCurrentImageContext() UIGraphicsEndImageContext() return scaledimage }

3. 实现键盘隐藏和弹出

@H_502_45@/* //此bool 标志是为了让键盘出现和隐藏成对出现，否则会出现跳出两次的情况.我也只有用这样的办法解决 = = // ps:如果你有更好的解决办法，希望能与我分享哦！上面有一个联系方式的 */ var bool:Bool = true func handleKeyboardWillShowNotification(notification: NSNotification) { if bool { keyboardWillChangeFrameWithNotification(notification,showsKeyboard: true) println("---show") bool = !bool } } func handleKeyboardWillHideNotification(notification: NSNotification) { if !bool { keyboardWillChangeFrameWithNotification(notification,showsKeyboard: false) println("---hide") bool = !bool } } func keyboardWillChangeFrameWithNotification(notification: NSNotification,showsKeyboard: Bool) { println("4") let userInfo = notification.userInfo! let animationDuration: NSTimeInterval = (userInfo[UIKeyboardAnimationDurationUserInfoKey] as! NSNumber).doubleValue // Convert the keyboard frame from screen to view coordinates. let keyboardScreenBeginFrame = (userInfo[UIKeyboardFrameBeginUserInfoKey] as! NSValue).CGRectValue() let keyboardScreenEndFrame = (userInfo[UIKeyboardFrameEndUserInfoKey] as! NSValue).CGRectValue() let keyboardViewBeginFrame = view.convertRect(keyboardScreenBeginFrame,fromView: view.window) let keyboardViewEndFrame = view.convertRect(keyboardScreenEndFrame,fromView: view.window) var originDelta = abs((keyboardViewEndFrame.origin.y - keyboardViewBeginFrame.origin.y)) println("the origin:\(originDelta)") // The text view should be adjusted,update the constant for this constraint. if showsKeyboard { textViewBottomLayoutGuideConstraint.constant += (originDelta) self.toolBarLayOut.constant += originDelta }else { textViewBottomLayoutGuideConstraint.constant -= (originDelta) self.toolBarLayOut.constant -= originDelta } UIView.animateWithDuration(animationDuration,delay: 0,options: .BeginFromCurrentState,animations: { self.view.layoutIfNeeded() },completion: nil) // Scroll to the selected text once the keyboard frame changes. self.text.scrollRangeToVisible(self.text.selectedRange) //让TextView滑到光标所在地方 }

4. 实现默认提示 文字 效果：点击进行编辑时提示 文字 自动消失

@H_502_45@/* // 实现默认提示文字效果：点击文字则会自动消失。 */ func textViewShouldBeginEditing(textView: UITextView) -> Bool { if !isThereHavedata { text.text = "" text.textColor = UIColor.blackColor() isThereHavedata = true } return true }

5. 解决改变文字 属性，TextView自动滑到顶部问题

@H_502_45@self.text.layoutManager.allowsNonContiguousLayout = false //用于解决改变文字属性，TextView自动滑到顶部问题 ####6.让TextView滑到光标所在点 self.text.scrollRangeToVisible(self.text.selectedRange) ####7.利用自动布局实现点击按钮底部工具栏隐藏到右端

@IBAction func toright(sender: UIBarButtonItem) {
    if self.toRight.constant < 0{                               //简单判断左移还是右移
        self.Toolbar.layer.cornerRadius = 22                    //改成圆角
        self.toRight.constant += (text.bounds.width - 10)
        sender.image = UIImage(named: "fa-left")                //改变图片
    }else {
        self.Toolbar.layer.cornerRadius = 0                     //恢复原来不是圆角那样
        self.toRight.constant -= (text.bounds.width - 10)
        sender.image = UIImage(named: "fa-right")
    }
}

8.简单封装了提示 文字的功能

@H_502_45@//复制showtext.swift文件到工程 Notice.showText("减小字体",fontsize: fontSize,obliqueness: 0)//弹出提示

9.设置点击隐藏导航栏，设置滑动隐藏导航栏

@H_502_45@self.navigationController?.hidesBarsOnTap = false //设置点击隐藏导航栏，false为取消 self.navigationController?.hidesBarsOnSwipe = true //设置滑动隐藏导航栏

10.解决UITextView经常出现光标不在最下方的情况

@H_502_45@/* 使用UITextView的时候经常出现光标不在最下方的情况。。。(iOS8) 解决方法： 1、首先去除所有的Padding： self.text.textContainerInset = UIEdgeInsetsZero self.text.textContainer.lineFragmentPadding = 0 2、然后在委托方法里加上一行： func textViewDidChange(textView: UITextView) { self.text.scrollRangeToVisible(self.text.selectedRange) } ps:委托方法在最下边。 */ self.text.textContainerInset = UIEdgeInsetsZero self.text.textContainer.lineFragmentPadding = 0

项目地址

github地址

https://github.com/lfb-cd/TextEditorDemo

如果有更新微博上会发消息的:我的微博

效果浏览:

（gif图片大约10MB）：

基于swift的一个富文本编辑器