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)
实现了一些基本功能，并解决了一些问题：
- 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可能还隐藏了一些BUG，如果你解决了希望能共享，谢谢！O(∩_∩)O~~
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 QQ：962429707
还有我的微博号:我的微博
项目地址
1. 更改字体：
//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：
/*
//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, delegate: self, cancelButtonTitle: "取消", destructiveButtonTitle: 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
/*
//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
/*
// 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
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
//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
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
/*
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
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:
IMG_0926.PNG
（gif图片大约4MB）：
myTest-1.gif
还有个gif太大了，传不了了。请移至github查看吧github地址
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