Android上的Swift编辑器,swift：textEditorDemo一个简单的富文本编辑器

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：

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

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