项目需要，根据输入字符串，计算字符串所需要占的Size。封装代码如下，只需传入字符串，即可返回Size：
Size ChartDemoScene::calculateFontSize(const char *str )
{
std::string tempString = str;
log("tempString = %s",tempString.c_str());
size_t computeCount = tempString.size();//如果字符串很长每次抽取100个字符来计算size；
Size size = Size(0,0);
for (int i = 0; isetHorizontalAlignment(cocos2d::TextHAlignment::LEFT);
Size tmpLsize = tempLabel->getContentSize();
size.width+=tmpLsize.width;
}
float fHeight= 0;
if( size.width > chartWidth)//大于容器的宽度
{
fHeight = (size.width / 200 );//计算需要多少行
}
int nHeight =ceil(fHeight);
if (nHeight == 0)
{
nHeight = 1;
}
Size labelSize ;
if (size.width
例子：
1、AppDelegate.cpp中添加如下代码
auto scene = ChartDemoScene::createScene();
// run
director->runWithScene(scene);
(1)ChartDemoScene.hChartDemoScene.h//
//ChartDemoScene.h
//chartDemo
//
//Created by chen on 14-9-2.
//
//
#ifndef __chartDemo__ChartDemoScene__
#define __chartDemo__ChartDemoScene__
#include "cocos2d.h"
#include "ui/CocosGUI.h"
#include "../cocos2d/extensions/cocos-ext.h"
using namespace cocos2d::ui;
USING_NS_CC;
USING_NS_CC_EXT;
class ChartDemoScene : public cocos2d::Layer//,public cocos2d::extension::EditBoxDelegate
{
public:
// there's no 'id' in cpp, so we recommend returning the class instance pointer
static cocos2d::Scene* createScene();
// Here's a difference. Method 'init' in cocos2d-x returns bool, instead of returning 'id' in cocos2d-iphone
virtual bool init();
// a selector callback
void menuCloseCallback(cocos2d::Ref* pSender);
// implement the "static create()" method manually
CREATE_FUNC(ChartDemoScene);
//virtual void editBoxEditingDidBegin(cocos2d::extension::EditBox* editBox);
//virtual void editBoxEditingDidEnd(cocos2d::extension::EditBox* editBox);
//virtual void editBoxTextChanged(cocos2d::extension::EditBox* editBox, const std::string& text);
//virtual void editBoxReturn(cocos2d::extension::EditBox* editBox);
void touchEvent(Ref *pSender, Widget::TouchEventType type);
void textFieldEvent(Ref* pSender, TextField::EventType type);
void showAlertShow(std::string contentString);
void alertCallback(ui::Text* alert);
Size calculateFontSize(const char *str);
std::string getcurrTime();//获取当前年月日
std::string getcurrMonthTime();//获取时分秒
//EditBox* editText;
TextField* editText;
Text* text;
TextField* _text;//获取被删除Item的内容
std::string file_path;//存放消息记录
TextField* textContent;
ui::Button* sendBtn;
std::string str;
Size winSize;
float chartWidth;
size_t length;
ui::ListView* _listView;
};
#endif /* defined(__chartDemo__ChartDemoScene__) */
(2)ChartDemoScene.cpp
#include "ChartDemoScene.h"
#include "stdio.h"
enum alertTag
{
Alert_Tag = 1000
}AlertTag;
enum textTag
{
T_Tag = 100
}TextTag;
USING_NS_CC;
int count = 1;
int _rem = 0;
Scene* ChartDemoScene::createScene()
{
// 'scene' is an autorelease object
auto scene = Scene::create();
scene->setColor(Color3B::BLACK);
// 'layer' is an autorelease object
auto layer = ChartDemoScene::create();
layer->setAnchorPoint(Vec2::ANCHOR_MIDDLE_BOTTOM);
layer->setContentSize(Size(640,960));
// add layer as a child to scene
scene->addChild(layer);
// return the scene
return scene;
}
// on "init" you need to initialize your instance
bool ChartDemoScene::init()
{
bool bRet = false;
do{
CC_BREAK_IF(!Layer::init());
//大背景
winSize = Director::getInstance()->getWinSize();
file_path = FileUtils::getInstance()->getWritablePath() + "chartContent.txt";
chartWidth = winSize.width *3 / 5;
auto sprite = Sprite::create("orange_edit.png");
sprite->setScaleX(winSize.width / sprite->getContentSize().width);
sprite->setScaleY(winSize.height / sprite->getContentSize().height);
sprite->setAnchorPoint(Vec2::ANCHOR_MIDDLE);
sprite->setPosition(Vec2(winSize.width/2,winSize.height/2));
addChild(sprite);
auto layerColor = LayerColor::create(Color4B(43, 177, 233, 255));
layerColor->setContentSize(Size(winSize.width,100));
layerColor->ignoreAnchorPointForPosition(false);
layerColor->setAnchorPoint(Vec2::ANCHOR_MIDDLE_TOP);
layerColor->setPosition(Vec2(winSize.width/2,winSize.height));
addChild(layerColor,4);
//底部输入栏
auto layout = Layout::create();
layout->setSize(Size(winSize.width,100));
layout->setAnchorPoint(Vec2::ZERO);
layout->setPosition(Vec2::ZERO);
layout->setBackGroundColorType(cocos2d::ui::Layout::BackGroundColorType::SOLID);
layout->setBackGroundColor(Color3B(185,185,185));
//消息显示栏
_listView = ListView::create();
_listView->setDirection(ui::ScrollView::Direction::VERTICAL);
_listView->setTouchEnabled(true);
_listView->setBounceEnabled(true);
_listView->setGravity(cocos2d::ui::ListView::Gravity::BOTTOM);
//_listView->setItemsMargin(2);
_listView->setBackGroundColorType(cocos2d::ui::Layout::BackGroundColorType::SOLID);
_listView->setBackGroundColor(Color3B::WHITE);
_listView->setSize(Size(winSize.width,winSize.height-layout->getSize().height-25-100));
_listView->setAnchorPoint(Vec2::ANCHOR_MIDDLE_BOTTOM);
_listView->setPosition(Vec2(winSize.width/2,layout->getSize().height+25));
addChild(_listView);
//底部输入框背景
auto bg = Sprite::create("whitebg.png");
bg->setScaleX(winSize.width*3/5 / bg->getContentSize().width);
bg->setScaleY(80 / bg->getContentSize().height);
bg->setAnchorPoint(Vec2::ANCHOR_MIDDLE_LEFT);
bg->setPosition(Vec2(winSize.width/5,layout->getSize().height/2));
layout->addChild(bg);
//
editText = TextField::create("","",30);
editText->ignoreContentAdaptWithSize(false);
editText->setSize(Size(winSize.width*3/5,80));
editText->setTextHorizontalAlignment(cocos2d::TextHAlignment::LEFT);
editText->setTextVerticalAlignment(cocos2d::TextVAlignment::BOTTOM);
editText->setAnchorPoint(Vec2::ANCHOR_MIDDLE_LEFT);
editText->setPosition(Vec2(winSize.width/5,layout->getSize().height/2));
editText->setColor(Color3B::BLACK);
editText->addEventListener(CC_CALLBACK_2(ChartDemoScene::textFieldEvent, this));
layout->addChild(editText);
addChild(layout);
//发送按钮
sendBtn = ui::Button::create("orange_edit.png");
sendBtn->setAnchorPoint(Vec2::ANCHOR_MIDDLE_RIGHT);
sendBtn->setPosition(Vec2(winSize.width - 20,layout->getSize().height/2));
addChild(sendBtn);
sendBtn->addTouchEventListener(CC_CALLBACK_2(ChartDemoScene::touchEvent,this));
auto alert_Text = ui::Text::create();
alert_Text->setSize(Size(50, 200));
alert_Text->setTag(Alert_Tag);
alert_Text->setOpacity(0);
alert_Text->setFontSize(35);
char* userdata = "11";
alert_Text->setUserData(userdata);
alert_Text->setColor(Color3B::BLACK);
alert_Text->setPosition(Vec2(winSize.width/2,winSize.height/8));
addChild(alert_Text);
bRet = true;
}while(0);
return bRet;
}
Size ChartDemoScene::calculateFontSize(const char *str )
{
std::string tempString = str;
log("tempString = %s",tempString.c_str());
size_t computeCount = tempString.size();//如果字符串很长每次抽取100个字符来计算size；
Size size = Size(0,0);
for (int i = 0; isetHorizontalAlignment(cocos2d::TextHAlignment::LEFT);
Size tmpLsize = tempLabel->getContentSize();
size.width+=tmpLsize.width;
}
float fHeight= 0;
if( size.width > chartWidth)
{
fHeight = (size.width / 200 );
}
int nHeight =ceil(fHeight);
if (nHeight == 0)
{
nHeight = 1;
}
Size labelSize ;
if (size.width setAnchorPoint(Vec2::ANCHOR_MIDDLE);
text->setColor(Color3B::BLACK);
auto _timeLayout = Layout::create();
_timeLayout->setSize(Size(_listView->getSize().width,60));
_timeLayout->setLayoutType(cocos2d::ui::Layout::Type::RELATIVE);
auto rp_time = RelativeLayoutParameter::create();
rp_time->setAlign(cocos2d::ui::RelativeLayoutParameter::RelativeAlign::CENTER_IN_PARENT);
text->setLayoutParameter(rp_time);
_timeLayout->addChild(text);
_listView->pushBackCustomItem(_timeLayout);
if(count % 2)
{
count++;
auto _lLayout = Layout::create();
_lLayout->setSize(Size(_listView->getSize().width,80));
_lLayout->setLayoutType(cocos2d::ui::Layout::Type::RELATIVE);
auto _lHeader = ui::ImageView::create("logo_douban.png");
_lHeader->setAnchorPoint(Vec2::ANCHOR_MIDDLE);
_lHeader->setScale(0.5);
auto rp_l = RelativeLayoutParameter::create();
rp_l->setMargin(Margin(10,0,0,0));
rp_l->setRelativeName("head");
rp_l->setAlign(cocos2d::ui::RelativeLayoutParameter::RelativeAlign::PARENT_LEFT_CENTER_VERTICAL);
_lHeader->setLayoutParameter(rp_l);
_lLayout->addChild(_lHeader);
auto _lTextContent = TextField::create("","",30);
_lTextContent->ignoreContentAdaptWithSize(false);
auto size = calculateFontSize(str.c_str());
_lTextContent->setSize(size);
_lTextContent->setTextHorizontalAlignment(cocos2d::TextHAlignment::LEFT);
if(size.width setTextHorizontalAlignment(cocos2d::TextHAlignment::RIGHT);
}
_lTextContent->setTextVerticalAlignment(cocos2d::TextVAlignment::CENTER);
_lTextContent->setTouchEnabled(false);
_lTextContent->setTag(T_Tag);
_lTextContent->setAnchorPoint(Vec2::ANCHOR_MIDDLE_LEFT);
_lTextContent->setColor(Color3B::BLACK);
_lTextContent->setText(str);
_lLayout->addChild(_lTextContent);
str.clear();
auto rp_t = RelativeLayoutParameter::create();
rp_t->setMargin(Margin(10,0,0,0));
rp_t->setRelativeToWidgetName("head");
rp_t->setAlign(cocos2d::ui::RelativeLayoutParameter::RelativeAlign::LOCATION_RIGHT_OF_CENTER);
_lTextContent->setLayoutParameter(rp_t);
_listView->pushBackCustomItem(_lLayout);
}else
{
count++;
auto _rLayout = Layout::create();
_rLayout->setSize(Size(_listView->getSize().width,80));
_rLayout->setLayoutType(cocos2d::ui::Layout::Type::RELATIVE);
auto _rHeader = ui::ImageView::create("logo_mingdao.png");
_rHeader->setAnchorPoint(Vec2::ANCHOR_MIDDLE);
_rHeader->setScale(0.5);
auto rp_r = RelativeLayoutParameter::create();
rp_r->setMargin(Margin(0,0,10,0));
rp_r->setRelativeName("head");
rp_r->setAlign(cocos2d::ui::RelativeLayoutParameter::RelativeAlign::PARENT_RIGHT_CENTER_VERTICAL);
_rHeader->setLayoutParameter(rp_r);
_rLayout->addChild(_rHeader);
auto _rTextContent = TextField::create("","",30);
_rTextContent->setTag(T_Tag);
_rTextContent->ignoreContentAdaptWithSize(false);
auto size = calculateFontSize(str.c_str());
_rTextContent->setSize(size);
_rTextContent->setTextHorizontalAlignment(cocos2d::TextHAlignment::LEFT);
_rTextContent->setTextVerticalAlignment(cocos2d::TextVAlignment::CENTER);
_rTextContent->setTouchEnabled(false);
_rTextContent->setAnchorPoint(Vec2::ANCHOR_MIDDLE_RIGHT);
_rTextContent->setColor(Color3B::BLACK);
_rTextContent->setText(str);
str.clear();
auto rp_l = RelativeLayoutParameter::create();
rp_l->setMargin(Margin(0,0,10,0));
rp_l->setRelativeToWidgetName("head");
rp_l->setAlign(cocos2d::ui::RelativeLayoutParameter::RelativeAlign::LOCATION_LEFT_OF_CENTER);
_rTextContent->setLayoutParameter(rp_l);
_rLayout->addChild(_rTextContent);
_listView->pushBackCustomItem(_rLayout);
}
//if(_listView->getContentSize().height > _listView->getSize().height)
//{
_listView->scrollToBottom(0.5, true);
//}
editText->setText("");
if(count > 3 )
{
_listView->removeItem(0);//删除时间标签，此时Item(0)就是内容标签
auto temp = static_cast(_listView->getItem(0));//获取当前内容标签
if(_text)
{
removeChild(_text);
}
_text = static_cast(temp->getChildByTag(T_Tag));//获取内容标签
log("string = %s", _text->getStringValue().c_str());//获取内容
log("file_path = %s",file_path.c_str());
FILE* fp = std::fopen(file_path.c_str(),"at+");
CCASSERT(fp != NULL, "file open error");
length = _text->getStringValue().length();
log("length = %lu",length);
fwrite(_text->getStringValue().c_str(), length, 1, fp);
fclose(fp);
_listView->removeItem(0);
}
break;
}
default:
break;
}
}
void ChartDemoScene::textFieldEvent(cocos2d::Ref *pSender, TextField::EventType type)
{
switch (type)
{
case TextField::EventType::ATTACH_WITH_IME:
{
TextField* textField = dynamic_cast(pSender);
Size widgetSize = winSize;
runAction(CCMoveTo::create(0.225f,Vec2(0, widgetSize.height / 2.0f)));
textField->setTextHorizontalAlignment(TextHAlignment::LEFT);
textField->setTextVerticalAlignment(TextVAlignment::TOP);
}
break;
case TextField::EventType::DETACH_WITH_IME:
{
TextField* textField = dynamic_cast(pSender);
Size widgetSize = winSize;
runAction(CCMoveTo::create(0.175f, Vec2(0, 0)));
textField->setTextHorizontalAlignment(TextHAlignment::LEFT);
textField->setTextVerticalAlignment(TextVAlignment::CENTER);
str = editText->getStringValue().c_str();
str += "\n";
}
break;
case TextField::EventType::INSERT_TEXT:
break;
case TextField::EventType::DELETE_BACKWARD:
break;
default:
break;
}
}
void ChartDemoScene::showAlertShow(std::string contentString)
{
auto alert = dynamic_cast<:text>(getChildByTag(Alert_Tag));
if (alert->getUserData() == "11") {
alert->setOpacity(255);
char* userdata = "110";
alert->setUserData(userdata);
alert->setString(contentString);
auto call_func = CallFunc::create(CC_CALLBACK_0(ChartDemoScene::alertCallback, this,alert));
auto seq = Sequence::create(FadeOut::create(1.0f),call_func, NULL);
alert->runAction(seq);
}
}
void ChartDemoScene::alertCallback(ui::Text* alert)
{
alert->setString("");
char* userdata = "11";
alert->setUserData(userdata);
}
std::string ChartDemoScene::getcurrTime()//获取当前年月日
{
#if (CC_TARGET_PLATFORM == CC_PLATFORM_ANDROID || CC_TARGET_PLATFORM == CC_PLATFORM_IOS)
struct timeval now;
struct tm* time;
gettimeofday(&now, NULL);
time = localtime(&now.tv_sec);
int year = time->tm_year + 1900;
char date[32] = {0};
sprintf(date, "%d-%02d-%02d",(int)time->tm_year + 1900,(int)time->tm_mon + 1,(int)time->tm_mday);
return StringUtils::format("%s",date);
#endif
#if ( CC_TARGET_PLATFORM == CC_PLATFORM_WIN32 )
struct tm* tm;
time_t timep;
time(timep);
tm = localtime(&timep);
char date[32] = {0};
sprintf(date, "%d-%02d-%02d",(int)time->tm_year + 1900,(int)time->tm_mon + 1,(int)time->tm_mday);
return StringUtils::format("%s",date);
#endif
}
std::string ChartDemoScene::getcurrMonthTime()
{
#if (CC_TARGET_PLATFORM == CC_PLATFORM_ANDROID || CC_TARGET_PLATFORM == CC_PLATFORM_IOS)
struct timeval now;
struct tm* time;
gettimeofday(&now, NULL);
time = localtime(&now.tv_sec);
int year = time->tm_year + 1900;
log("year = %d",year);
char date1[24] = {0};
char date[8] = {0};
sprintf(date1, "%d:%02d:%02d:%02d:%02d:%02d",(int)time->tm_year + 1900,(int)time->tm_mon + 1,(int)time->tm_mday,time->tm_hour,time->tm_min,time->tm_sec);
sprintf(date, "%02d:%02d",time->tm_hour,time->tm_min);
return StringUtils::format("%s",date);
#endif
#if ( CC_TARGET_PLATFORM == CC_PLATFORM_WIN32 )
struct tm* tm;
time_t timep;
time(timep);
tm = localtime(&timep);
char date[32] = {0};
sprintf(date, "%d-%02d-%02d",(int)time->tm_year + 1900,(int)time->tm_mon + 1,(int)time->tm_mday);
return StringUtils::format("%s",date);
#endif
}
void ChartDemoScene::menuCloseCallback(Ref* pSender)
{
#if (CC_TARGET_PLATFORM == CC_PLATFORM_WP8) || (CC_TARGET_PLATFORM == CC_PLATFORM_WINRT)
MessageBox("You pressed the close button. Windows Store Apps do not implement a close button.","Alert");
return;
#endif
Director::getInstance()->end();
#if (CC_TARGET_PLATFORM == CC_PLATFORM_IOS)
exit(0);
#endif
}
