cocos2dx3.6 实现带光标的输入框（二);光标可移动

现在光标终于可移动了，然后其实主要是逻辑问题，也没什么技术含量，所以总是一大堆位置判断！再者自己能力比较水，所以代码比较挫，这里代码只有更新那部分，具体的回车什么的自己去弄就好了，其实跟这个思想差不多吧！个人觉得。

代码：

CursorTextField.h

#ifndef _CursorTextField_H_#define _CursorTextField_H_#include "cocos2d.h"USING_NS_CC;class CursorTextField : public TextFieldTTF, public TextFieldDelegate{private:// 点击开始位置Point m_beginPos;// 光标精灵Sprite * m_pCursorSprite;// 光标动画Action *m_pCursorAction;// 光标坐标Point m_cursorPos;//输入框长度float inputFrameWidth;//允许输入的最大字符数Unicodefloat inputMaxLength;int m_Sprite_Posi = 0;// 输入框总内容std::string m_pInputText;std::string inpuText; //当前输入框内容int fontsize = 0;std::string fontName;int nowtextlenght = 0;void setTextPosi(std::string , bool is_add = true);public:CursorTextField();~CursorTextField();static CursorTextField * getinstance();// staticstatic CursorTextField * textFieldWithPlaceHolder(cocos2d::Node * node , const char *placeholder, const char *fontName, float fontSize);// Layervoid onEnter();void onExit();bool init();// 初始化光标精灵void initCursorSprite(int nHeight);virtual void setPositionX(Node *node , float x);// TextFieldDelegatevirtual bool onTextFieldAttachWithIME(TextFieldTTF *pSender) override;virtual bool onTextFieldDetachWithIME(TextFieldTTF * pSender) override;virtual bool onTextFieldInsertText(cocos2d::TextFieldTTF*  sender, const char * text, size_t nLen) override;virtual bool onTextFieldDeleteBackward(cocos2d::TextFieldTTF*  sender, const char * delText, size_t nLen) override;virtual void setPosition(const Point& pos);virtual void setPosition(float &x, float &y);void setCursorPositionX(float x); // 设置光标x位置// 把光标添加到和输入框一起的层中void AddCursor(Node *node);// Layer Touchbool onTouchBegan(Touch *pTouch, Event *pEvent);void onTouchEnded(Touch *pTouch, Event *pEvent);void onKeyPressed(cocos2d::EventKeyboard::KeyCode, cocos2d::Event*);void onKeyReleased(cocos2d::EventKeyboard::KeyCode, cocos2d::Event*);// 判断是否点击在TextField处bool isInTextField(Touch *pTouch);// 得到TextField矩形Rect getRect();// 打开输入法void openIME();// 关闭输入法void closeIME();std::string split_text(std::string name, int len , int start);const char* getInputText();void setInpuntText(char* text);void setInputWidth(float width);void setInputMaxLength(float length);cocos2d::Node * parentNode;void BlickSpriteLeft();void BlickSpriteRight();void KeyDelete();float getLabelWidth(std::string str , std::string fontName, float fontsize);int getPosifromText(std::string str, int posi);int getPosiformPosi(std::string str, float posi);void MyRemoveFromParent();protected:EventListenerTouchOneByOne * listener;};#endif

CursorTextField.cpp

#include "CursorTextField.h"#include "MyCharSet.h"#include "MyKeyInsert.h"const static float DELTA = 0.5f;using namespace cocos2d;using namespace std;static CursorTextField * _CursorTextField;CursorTextField::CursorTextField(){TextFieldTTF();m_pCursorSprite = NULL;m_Sprite_Posi = 0;}CursorTextField::~CursorTextField(){}CursorTextField * CursorTextField::getinstance(){return _CursorTextField;}void CursorTextField::onEnter(){TextFieldTTF::onEnter();listener = EventListenerTouchOneByOne::create();listener->setSwallowTouches(true);listener->onTouchBegan = CC_CALLBACK_2(CursorTextField::onTouchBegan, this);listener->onTouchEnded = CC_CALLBACK_2(CursorTextField::onTouchEnded, this);Director::getInstance()->getEventDispatcher()->addEventListenerWithSceneGraphPriority(listener, this);KeyInsert::getinstence()->addKeyBordClick(this);this->setDelegate(this);}CursorTextField * CursorTextField::textFieldWithPlaceHolder(Node * node , const char *placeholder, const char *fontName, float fontSize){_CursorTextField = new (std::nothrow)CursorTextField();_CursorTextField->parentNode = node;if (_CursorTextField && ((TextFieldTTF*)_CursorTextField)->initWithPlaceHolder(placeholder, fontName, fontSize)){_CursorTextField->fontsize = fontSize;_CursorTextField->fontName = fontName;_CursorTextField->autorelease();if (placeholder){_CursorTextField->setPlaceHolder(placeholder);}_CursorTextField->init();_CursorTextField->initCursorSprite(fontSize);_CursorTextField->setHorizontalAlignment(kCCTextAlignmentLeft);return _CursorTextField;}CC_SAFE_DELETE(_CursorTextField);return NULL;}bool CursorTextField::init(){this->inputFrameWidth = 400;this->inputMaxLength = 16;inpuText = "";return true;}void CursorTextField::initCursorSprite(const int mHeight){int column = 2;int nHeight = 20;int pixels[50][2];for (int i = 0; i < nHeight; ++i){for (int j = 0; j < column; ++j){pixels[i][j] = 0xffffffff;}}Texture2D* texture = new Texture2D();texture->initWithData(pixels, 20, Texture2D::PixelFormat::RGB888, 4, mHeight, CCSizeMake(column, nHeight));m_pCursorSprite = Sprite::createWithTexture(texture);texture->autorelease();if (m_pCursorSprite == nullptr){CCLOG("NULL");}//m_pCursorSprite->setColor(Color3B(255, 0, 0));Size winSize = getContentSize();m_pCursorSprite->setVisible(false);parentNode->addChild(m_pCursorSprite);m_pCursorAction = RepeatForever::create(Sequence::create(FadeOut::create(0.25f), FadeIn::create(0.25f), NULL));m_pCursorSprite->runAction(m_pCursorAction);//m_pInputText = new std::string();}void CursorTextField::setPositionX(Node * node, float x){int i = 0;int count = 0;float width = 0.0;std::string str;if (m_Sprite_Posi <= 0){width = 0.0;m_Sprite_Posi = 0;}else{std::string ss;for (i = 0; i < inpuText.size();){ss = split_text(inpuText, 1, i);i += ss.length();str.append(ss);count++;if (count == m_Sprite_Posi){break;}}width = getLabelWidth(str, _CursorTextField->fontName, _CursorTextField->fontsize);}width += x;node->setPositionX(width);}void CursorTextField::setPosition(float &x, float &y){Point posi(x, y);setPosition(posi);}void CursorTextField::setPosition(const Point& pos){TextFieldTTF::setPosition(pos);// 设置光标位置if (NULL != m_pCursorSprite){Size winSize = getContentSize();m_cursorPos = ccp(0, 0/*winSize.height / 2*/);m_cursorPos = m_cursorPos + pos;m_pCursorSprite->setPosition(m_cursorPos.x + m_pCursorSprite->getContentSize().width , m_cursorPos.y + m_pCursorSprite->getContentSize().height / 2.0);}}void CursorTextField::setCursorPositionX(float x) // 设置光标x位置{Point pt = getPosition(); // 获取输入框位置x += pt.x;setPositionX(m_pCursorSprite , x);}// 把光标添加到和输入框一起的层中void CursorTextField::AddCursor(Node *node){if (NULL != node && NULL != m_pCursorSprite){node->addChild(m_pCursorSprite);m_pCursorSprite->setPositionY(getContentSize().height / 2.0);m_pCursorSprite->runAction(m_pCursorAction);}}bool CursorTextField::onTouchBegan(cocos2d::Touch *pTouch, cocos2d::Event *pEvent){m_beginPos = pTouch->getLocation();return true;}Rect CursorTextField::getRect(){Size check;check.width = fontsize;Size size = getContentSize() + check;return  CCRectMake(0, -size.height / 2, inputFrameWidth, size.height);}//获取输入框内容const char* CursorTextField::getInputText(){const char* text = m_pInputText.c_str();return text;}//设置输入框内容void CursorTextField::setInpuntText(char* text){m_pInputText = "";setString(text);setPositionX(m_pCursorSprite, this->getPosition().x);inpuText = "";}//设置输入框宽度 一旦字符串宽度超度这个长度 字符串会自动向左缩进void CursorTextField::setInputWidth(float width){this->inputFrameWidth = width;}//设置输入宽显示的最大字符数量Unicodevoid CursorTextField::setInputMaxLength(float length){this->inputMaxLength = length;}//判断点击事件，是否响应在输入框范围内bool CursorTextField::isInTextField(cocos2d::Touch *pTouch){return getRect().containsPoint(convertTouchToNodeSpaceAR(pTouch));}void CursorTextField::onTouchEnded(cocos2d::Touch *pTouch, cocos2d::Event *pEvent){Point endPos = pTouch->getLocation();// 判断是否为点击事件if (::abs(endPos.x - m_beginPos.x) > DELTA ||::abs(endPos.y - m_beginPos.y)){// 不是点击事件m_beginPos.x = m_beginPos.y = -1;return;}// 判断是打开输入法还是关闭输入法isInTextField(pTouch) ? openIME() : closeIME();if (m_pCursorSprite->isVisible()){//开始所在字节int len = getPosiformPosi(inpuText, m_pCursorSprite->getPositionX());//结束所在的字节int endlen = getPosiformPosi(inpuText, endPos.x);m_pCursorSprite->setPositionX(this->getPositionX() + getLabelWidth(inpuText.substr(0, endlen), fontName, fontsize));int i = 0;int count = 0;//点了前面,mposi减去字符if (len > endlen){count = 0;for (i = endlen; i < len;){std::string temp = split_text(inpuText, 1, i);count++;i += temp.length();}m_Sprite_Posi -= count;}//原来位置else if (len == endlen){}//点了后面,mposi加上字符else{count = 0;for (i = len; i < endlen;){std::string temp = split_text(inpuText, 1, i);count++;i += temp.length();}m_Sprite_Posi += count;}}}//弹出手机键盘时响应事件bool CursorTextField::onTextFieldAttachWithIME(cocos2d::TextFieldTTF *pSender){if (m_pInputText.empty()) {return false;}//setPositionX(m_pCursorSprite , this->getPosition().x);return false;}//当有输入进来时响应//@param pSender 发送事件对象//@param text 输入内容//@param  内容字节长度bool CursorTextField::onTextFieldInsertText(cocos2d::TextFieldTTF* sender, const char * text, size_t nLen){//log("OUT   ====   %s =Length= %d", text , nLen);int j = 0 ;std::string mytext = text;for (j = 0; j < mytext.size();){std::string sText = m_pInputText.c_str();wchar_t* wText = new wchar_t[200];char t[200];memset(t, 0, sizeof(t));strcpy(t, sText.c_str());int unisize = 0;int codenum = MyCharSet::getinstence()->utf8_to_unicode((uint8_t*)t, (uint16_t **)wText, &unisize);//当字符数量超过规定值 不做处理if (codenum >= inputMaxLength && inputMaxLength != 0){codenum = inputMaxLength;CC_SAFE_DELETE_ARRAY(wText);return true;}nowtextlenght++;std::string ss = split_text(mytext, 1, j);j += ss.length();//屏蔽回车输入if (ss == "\n"){CC_SAFE_DELETE_ARRAY(wText);continue;}std::string mmss = "";std::string mystr;int i = 0;//根据字符位置插入if (m_Sprite_Posi != 0){int count = 0;for (i = 0; i < m_pInputText.size();){mmss = split_text(m_pInputText, 1, i);i += mmss.length();mystr.append(mmss);count++;if (count == m_Sprite_Posi){break;}}}//字符位置相加m_Sprite_Posi++;mystr.append(ss);mystr.append(m_pInputText.substr(i));//输入框总内容就是两个相加m_pInputText.clear();//inpuText.clear();m_pInputText.append(mystr);//inpuText.append(mystr);//输入框当前字符串添加//inpuText.append(ss);setTextPosi(ss, true);CC_SAFE_DELETE_ARRAY(wText);//AndroidShowtext(mychar, 1);}return true;}//当有输入进来时响应//@param pSender 发送事件对象//@param text 删除内容//@param  内容字节长度bool CursorTextField::onTextFieldDeleteBackward(cocos2d::TextFieldTTF* sender, const char * delText, size_t nLen){std::string ss;if (m_Sprite_Posi != 0){int i = 0;int count = 0;for (i = 0; i < m_pInputText.size();){ss = split_text(m_pInputText, 1, i);i += ss.length();count++;if (count == m_Sprite_Posi){m_pInputText.erase(i - ss.length(), ss.length());//inpuText.erase(i - ss.length(), ss.length());break;}}}//字符位置减1m_Sprite_Posi--;//m_pInputText.resize(m_pInputText.size() - nLen);if (m_pInputText.size() <= 0){m_Sprite_Posi = 0;}if (m_Sprite_Posi < 0){m_Sprite_Posi = 0;}setTextPosi(ss , false);return true;}void CursorTextField::setTextPosi(std::string ss , bool is_add){if (inputFrameWidth <= 0){inputFrameWidth = _CursorTextField->inputFrameWidth;}if (!is_add){if (m_pInputText.empty()){m_Sprite_Posi = 0;m_pCursorSprite->setPositionX(m_pCursorSprite->getPositionX() - getLabelWidth(ss, fontName, fontsize));setString("");inpuText.clear();return;}std::string localText = inpuText;int i = getPosifromText(m_pInputText, m_Sprite_Posi);int inlength = getPosiformPosi(inpuText, m_pCursorSprite->getPositionX());if (inlength == 0){return;}std::string mystr;std::string instr;if (i >= inlength){int reposi = i - inlength;for (i = 0; i < m_pInputText.length();){std::string temp = split_text(m_pInputText, 1, i);if (i <= reposi && reposi < temp.length() + i){break;}else{i += temp.length();}}mystr = m_pInputText.substr(i, 1);if (!mystr.empty()){if (mystr[0] < 0){mystr = m_pInputText.substr(i, 3);}else{mystr = m_pInputText.substr(i, 1);}}}//当前输入框剔除std::string deletestr;if (inlength - 3 >= 0){int reposi = inlength;for (i = 0; i < inpuText.length();){std::string temp = split_text(inpuText, 1, i);if (i <= reposi && reposi <= temp.length() + i){break;}else{i += temp.length();}}deletestr = inpuText.substr(i, 3);if (deletestr[0] < 0){inpuText.erase(inlength - 3, 3);}else if (!deletestr.empty()){deletestr = inpuText.substr(inlength - 1, 1);inpuText.erase(inlength - 1, 1);}//log("%s   %s", inpuText.c_str(), deletestr.c_str());}else{deletestr = inpuText.substr(0, 3);if (deletestr[0] < 0){inpuText.erase(inlength - 3, 3);}else if (!deletestr.empty()){deletestr = inpuText.substr(inlength - 1, 1);inpuText.erase(inlength - 1, 1);}}if (mystr.empty()){instr = m_pInputText.substr(inpuText.length() , 1);if (!instr.empty()){if (instr[0] < 0){instr = m_pInputText.substr(inpuText.length(), 3);}else{//instr.erase(1, 2);instr = m_pInputText.substr(inpuText.length(), 1);}}inpuText.append(instr);}std::string lastins = mystr;mystr.append(inpuText);inpuText = mystr;if (lastins.empty()){m_pCursorSprite->setPositionX(m_pCursorSprite->getPositionX() - getLabelWidth(deletestr, fontName, fontsize));}else if (!instr.empty()){float reposi = getLabelWidth(deletestr, fontName, fontsize) - getLabelWidth(instr, fontName, fontsize);m_pCursorSprite->setPositionX(m_pCursorSprite->getPositionX() + reposi);}else if (!lastins.empty()){float reposi = getLabelWidth(lastins, fontName, fontsize) - getLabelWidth(deletestr, fontName, fontsize);m_pCursorSprite->setPositionX(m_pCursorSprite->getPositionX() + reposi);}setString(inpuText);}else{std::string localText = m_pInputText;setString(m_pInputText);//如果总字符串的长度大于指定宽度if (getLabelWidth(m_pInputText , fontName , fontsize) > inputFrameWidth){int inlength = getPosiformPosi(inpuText, m_pCursorSprite->getPositionX());//光标在0处,需要获取到当前输入框最后一个字符,if (inlength == 0){std::string mystr = ss;mystr.append(inpuText);inpuText = mystr;std::string str = inpuText.substr(inpuText.length() - 1);if (str[0] < 0){inpuText.resize(inpuText.length() - 3);}else{inpuText.resize(inpuText.length() - 1);}setString(inpuText);m_pCursorSprite->setPositionX(m_pCursorSprite->getPositionX() + getLabelWidth(ss, fontName, fontsize));return;}//光标在末尾,需要获取第一个字符else if (inlength == inpuText.length()){inpuText.append(ss);std::string str = inpuText.substr(0, 3);if (str[0] < 0){inpuText.erase(0, 3);}else{str.erase(1, 2);inpuText.erase(0, 1);}setString(inpuText);float x = getLabelWidth(str, fontName, fontsize) - getLabelWidth(ss, fontName, fontsize);m_pCursorSprite->setPositionX(m_pCursorSprite->getPositionX() - x);return;}//在字符两段切割std::string last = inpuText.substr(0 , inlength);std::string next = inpuText.substr(inlength);//字符相连inpuText = last;inpuText.append(ss);inpuText.append(next);std::string temp = inpuText.substr(0, 3);if (temp[0] < 0 ){inpuText.erase(0, 3);}else{inpuText.erase(0, 1);temp = inpuText.substr(0, 1);}float reposi = getLabelWidth(ss, fontName, fontsize) - getLabelWidth(temp, fontName, fontsize);m_pCursorSprite->setPositionX(m_pCursorSprite->getPositionX() + reposi);setString(inpuText);}else{//小于，直接设置显示总字符串int startCur = 0;setString(m_pInputText);inpuText = m_pInputText;std::string showinput;for (int j = 0; j < m_pInputText.size();){std::string nowstr = split_text(m_pInputText , 1 ,j);showinput.append(nowstr);j += nowstr.length();startCur++;if (startCur == m_Sprite_Posi){break;}}startCur = 0;m_pCursorSprite->setPositionX(this->getPosition().x + getLabelWidth(showinput, fontName, fontsize));}//设置光标位置//setPositionX(m_pCursorSprite, this->getPosition().x);}}bool CursorTextField::onTextFieldDetachWithIME(cocos2d::TextFieldTTF *pSender){return false;}void CursorTextField::openIME(){m_pCursorSprite->setVisible(true);#if ( CC_TARGET_PLATFORM == CC_PLATFORM_ANDROID)setString(m_pInputText);#endif((TextFieldTTF *)this)->attachWithIME();}void CursorTextField::closeIME(){m_pCursorSprite->setVisible(false);//auto pTextField = (TextFieldTTF *)pRet;((TextFieldTTF *)this)->detachWithIME();}void CursorTextField::onExit(){TextFieldTTF::onExit();Director::getInstance()->getEventDispatcher()->removeEventListener(listener);KeyInsert::getinstence()->destoryinstence();}//根据位置分割字符，并返回字符std::string CursorTextField::split_text(std::string name, int len , int start){int i = start;std::string str;if (name[i] < 0){i++;}if (start == i){str = name.substr(start, 1);}else{str = name.substr(start, 3);}//log("mysubstr   %s", str.c_str());return str;}//向左移void CursorTextField::BlickSpriteLeft(){if (!_CursorTextField->m_pCursorSprite->isVisible()){return;}float posix = _CursorTextField->m_pCursorSprite->getPosition().x;float contextsizeposi = _CursorTextField->m_pCursorSprite->getContentSize().width / 2;float parentposi = _CursorTextField->getPosition().x;std::string str;//光标已在输入框最左边if (posix - parentposi <= contextsizeposi){if (_CursorTextField->m_pInputText == _CursorTextField->inpuText || _CursorTextField->m_Sprite_Posi == 0){return;}int mlength = _CursorTextField->getPosifromText(_CursorTextField->m_pInputText, _CursorTextField->m_Sprite_Posi);//光标在所有字符的最左边if (mlength <= 0){return;}//选取光标前一个字符str = _CursorTextField->m_pInputText.substr(mlength - 1, 1);if (str[0] < 0){str = _CursorTextField->m_pInputText.substr(mlength - 3, 3);}std::string mystr = _CursorTextField->inpuText.substr(_CursorTextField->inpuText.length() - 1, 1);//剔除最后一个字符if (mystr[0] < 0){_CursorTextField->inpuText.resize(_CursorTextField->inpuText.length() - 3);}else{_CursorTextField->inpuText.resize(_CursorTextField->inpuText.length() - 1);}//字符相加str.append(_CursorTextField->inpuText);_CursorTextField->inpuText = str;_CursorTextField->setString(_CursorTextField->inpuText);}else{//只是移动int nlength = _CursorTextField->getPosiformPosi(_CursorTextField->inpuText, _CursorTextField->m_pCursorSprite->getPositionX());str = _CursorTextField->inpuText.substr(nlength - 1, 1);if (str[0] < 0){str = _CursorTextField->inpuText.substr(nlength - 3, 3);}float nowposi = _CursorTextField->getLabelWidth(str, _CursorTextField->fontName, _CursorTextField->fontsize);_CursorTextField->m_pCursorSprite->setPositionX(_CursorTextField->m_pCursorSprite->getPositionX() - nowposi);}//光标所在所有字符中减一_CursorTextField->m_Sprite_Posi--;if (_CursorTextField->m_Sprite_Posi < 0){_CursorTextField->m_Sprite_Posi = 0;}}//向右与左类似void CursorTextField::BlickSpriteRight(){if (!_CursorTextField->m_pCursorSprite->isVisible()){return;}float posix = _CursorTextField->m_pCursorSprite->getPosition().x;float contextsizeposi = _CursorTextField->m_pCursorSprite->getContentSize().width / 2;float parentposi = _CursorTextField->getPosition().x + _CursorTextField->getLabelWidth(_CursorTextField->inpuText , _CursorTextField->fontName , _CursorTextField->fontsize);std::string str;if (posix + contextsizeposi >= parentposi){if (_CursorTextField->m_pInputText == _CursorTextField->inpuText || _CursorTextField->m_Sprite_Posi >= _CursorTextField->nowtextlenght){return;}int mlength = _CursorTextField->getPosifromText(_CursorTextField->m_pInputText, _CursorTextField->m_Sprite_Posi);if (mlength == _CursorTextField->m_pInputText.length()){return;}str = _CursorTextField->m_pInputText.substr(mlength, 1);if (str[0] < 0){str = _CursorTextField->m_pInputText.substr(mlength, 3);}std::string mystr = _CursorTextField->inpuText.substr(0, 1);if (mystr[0] < 0){mystr = _CursorTextField->inpuText.substr(0, 3);_CursorTextField->inpuText.erase(0, 3);}else{_CursorTextField->inpuText.erase(0, 1);}_CursorTextField->inpuText.append(str);//位移差float posix = getLabelWidth(str, _CursorTextField->fontName, _CursorTextField->fontsize) - getLabelWidth(mystr , _CursorTextField->fontName ,_CursorTextField->fontsize);_CursorTextField->m_pCursorSprite->setPositionX(_CursorTextField->m_pCursorSprite->getPositionX() + posix);_CursorTextField->setString(_CursorTextField->inpuText);}else{int nlength = _CursorTextField->getPosiformPosi(_CursorTextField->inpuText, _CursorTextField->m_pCursorSprite->getPositionX());str = _CursorTextField->inpuText.substr(nlength, 1);if (str[0] < 0){str = _CursorTextField->inpuText.substr(nlength, 3);}float nowposi = _CursorTextField->getLabelWidth(str, _CursorTextField->fontName, _CursorTextField->fontsize);_CursorTextField->m_pCursorSprite->setPositionX(_CursorTextField->m_pCursorSprite->getPositionX() + nowposi);}_CursorTextField->m_Sprite_Posi++;}void CursorTextField::KeyDelete(){if (!_CursorTextField->m_pCursorSprite->isVisible()){return;}int nlength = _CursorTextField->getPosiformPosi(_CursorTextField->inpuText, _CursorTextField->m_pCursorSprite->getPositionX());int mlength = _CursorTextField->getPosifromText(_CursorTextField->m_pInputText, _CursorTextField->m_Sprite_Posi);std::string inlast;std::string innext;std::string insMNext;std::string insMLast;if (mlength == _CursorTextField->m_pInputText.length()){return;}std::string in_str = _CursorTextField->inpuText.substr(nlength, 3);std::string im_str = _CursorTextField->m_pInputText.substr(mlength, 3);if (in_str[0] < 0){_CursorTextField->inpuText.erase(nlength, 3);}else{_CursorTextField->inpuText.erase(nlength, 1);}if (im_str[0] < 0){_CursorTextField->m_pInputText.erase(mlength, 3);}else{_CursorTextField->m_pInputText.erase(mlength, 1);}insMNext = _CursorTextField->m_pInputText.substr(mlength + _CursorTextField->inpuText.length() - nlength, 1);if (insMNext[0] >= 0){insMNext = _CursorTextField->m_pInputText.substr(mlength + _CursorTextField->inpuText.length() - nlength, 1);}else{insMNext = _CursorTextField->m_pInputText.substr(mlength + _CursorTextField->inpuText.length() - nlength, 3);}if (insMNext.empty() && mlength != nlength){if (mlength - nlength - 3 < 0){insMLast = _CursorTextField->m_pInputText.substr(mlength - nlength - 1, 1);}else{int lenposi = mlength - nlength;int i;for (i = 0; i < _CursorTextField->m_pInputText.length();){std::string temp = _CursorTextField->split_text(_CursorTextField->m_pInputText, 1, i);if (i <= lenposi && lenposi < i + temp.length()){break;}i += temp.length();}lenposi = i;insMLast = _CursorTextField->m_pInputText.substr(lenposi - 3, 3);if (insMLast[2] >= 0){insMLast = _CursorTextField->m_pInputText.substr(lenposi - 1, 1);}}}std::string myallstr;myallstr.append(insMLast);myallstr.append(_CursorTextField->inpuText);myallstr.append(insMNext);_CursorTextField->inpuText = myallstr;_CursorTextField->setString(_CursorTextField->inpuText);if (!insMLast.empty()){_CursorTextField->m_pCursorSprite->setPositionX(_CursorTextField->m_pCursorSprite->getPositionX() + _CursorTextField->getLabelWidth(insMLast, _CursorTextField->fontName, _CursorTextField->fontsize));}}//根据string获取字符宽度float CursorTextField::getLabelWidth(std::string str, std::string fontName, float fontsize){if (str.empty()){return 0;}LabelTTF * label = LabelTTF::create(str, fontName, fontsize);float nowposi = label->getContentSize().width;return nowposi;}//根据字符位置返回字节位置int CursorTextField::getPosifromText(std::string str, int posi){int count = 0;int i;for (i = 0; i < str.length();){std::string mystr = split_text(str, 1, i);i += mystr.length();count++;if (count == posi){return i;}}return 0;}//根据坐标位置返回字节位置int CursorTextField::getPosiformPosi(std::string str, float posi){std::string mystr;std::string temp;float parentPosi = this->getPositionX();float reposi = posi - parentPosi;if (parentPosi + getLabelWidth(str , fontName ,fontsize) <= posi){return str.length();}if (reposi <= 0){return 0;}int i = 0;float last, next;for (i = 0; i < str.length();){ temp = split_text(str, 1, i); last = getLabelWidth(mystr, fontName, fontsize); next = getLabelWidth(mystr.append(temp), fontName, fontsize); if (last <= reposi && next > reposi) { return i; } else if (next == reposi) { return i + temp.length(); } i += temp.length();}return 0;}void CursorTextField::MyRemoveFromParent(){if (_CursorTextField){m_pCursorSprite->stopAllActions();parentNode->removeChild(m_pCursorSprite);parentNode->removeChild(_CursorTextField);_CursorTextField = NULL;}}

MyKeyInsert.h

#pragma once//#include "cocos2d.h"#include "CursorTextField.h"class KeyInsert : public CursorTextField{public:KeyInsert();~KeyInsert();static KeyInsert * getinstence();static void destoryinstence();void addKeyBordClick(cocos2d::Node * node);cocos2d::Node * parentNode;cocos2d::EventListenerKeyboard * _keyBordListener;void onKeyPressed(cocos2d::EventKeyboard::KeyCode, cocos2d::Event*);void onKeyReleased(cocos2d::EventKeyboard::KeyCode,cocos2d::Event*);private:};

MyKeyInsert.cpp

#include "MyKeyInsert.h"USING_NS_CC;static KeyInsert * _KeyInsert = NULL;KeyInsert::KeyInsert(){_KeyInsert = this;_KeyInsert->autorelease();}KeyInsert::~KeyInsert(){}KeyInsert * KeyInsert::getinstence(){if (_KeyInsert == NULL){_KeyInsert = new (std::nothrow)KeyInsert();}return _KeyInsert;}void KeyInsert::destoryinstence(){Director::getInstance()->getEventDispatcher()->removeEventListener(_KeyInsert->_keyBordListener);CC_SAFE_RELEASE(_KeyInsert);}void KeyInsert::addKeyBordClick(cocos2d::Node * node){_KeyInsert->parentNode = node;_KeyInsert->_keyBordListener = EventListenerKeyboard::create();_KeyInsert->_keyBordListener->onKeyPressed = CC_CALLBACK_2(KeyInsert::onKeyPressed, this);_KeyInsert->_keyBordListener->onKeyReleased = CC_CALLBACK_2(KeyInsert::onKeyReleased, this);Director::getInstance()->getEventDispatcher()->addEventListenerWithSceneGraphPriority(_keyBordListener, _KeyInsert->parentNode);}void KeyInsert::onKeyPressed(EventKeyboard::KeyCode keycode, Event* event){switch (keycode){case EventKeyboard::KeyCode::KEY_LEFT_ARROW://log("Left");BlickSpriteLeft();break;case EventKeyboard::KeyCode::KEY_RIGHT_ARROW://log("right");BlickSpriteRight();break;case EventKeyboard::KeyCode::KEY_DELETE :KeyDelete();break;case EventKeyboard::KeyCode::KEY_UP_ARROW:log("Up");break;case EventKeyboard::KeyCode::KEY_DOWN_ARROW:log("DOWN");break;default:break;}}void KeyInsert::onKeyReleased(EventKeyboard::KeyCode keycode, Event* event){//log("BBB");}

具体效果自己去测试！我偷了下懒，那就是不是限定位置而是限定字符！