cocos2dx开发 之 使用TextField文本框登录页面的初步开发（代码内注释详细）

#pragma once
#include "cocos2d.h"
using namespace cocos2d;

#include "ui/CocosGUI.h"
using namespace ui;

class TextFieldDemo :public Scene
{
public:
	virtual bool init();
	CREATE_FUNC(TextFieldDemo);
	static Scene* createScene();
	char* FontToUTF8(const char* font);
private:
	TextField* id;  //id文本框
	TextField* key; //keyword文本框
	Button* go;     //登录按钮
};

以下是cpp文件

#include "TextFieldDemo.h"
#include "loding.h"
Scene* TextFieldDemo::createScene()
{
	return TextFieldDemo::create();
}

bool TextFieldDemo::init()
{
	if (!Scene::init())
	{
		return false;
	}
	//按钮创建
	go = Button::create("112.png", "113.png", "114.png"); 
	this->addChild(go);

	//权限默认为不能按
	go->setEnabled(false);

	//登陆背景
	auto put_in = Sprite::create("denglu.png");
	put_in->setAnchorPoint(Vec2::ANCHOR_MIDDLE);
	put_in->setPosition(Director::getInstance()->getVisibleSize()/2);
	this->addChild(put_in);

	//账号文本框初始化
	id = TextField::create();

	//设置账号文本框字体
	id->setFontName("arial");

	//设置文本框大小
	id->setFontSize(36);

	//设置账号文本框默认显示
	auto _id = String::create(TextFieldDemo::FontToUTF8("请输入您的账号"));
	id->setPlaceHolder(_id->getCString());

	//设置显示颜色
	id->setColor(Color3B::RED);
	this->addChild(id);

	//设置账号文本框坐标
	id->setAnchorPoint(Vec2::ANCHOR_MIDDLE);
	id->setPosition(put_in->getPosition()+Vec2(30,-50));

	//设置密码文本框
	key = TextField::create();
	key->setFontName("arial");
	key->setFontSize(36);
	auto _key = String::create(TextFieldDemo::FontToUTF8("请输入您的密码"));
	key->setPlaceHolder(_key->getCString());
	key->setColor(Color3B::RED);
	this->addChild(key);
	key->setAnchorPoint(Vec2::ANCHOR_MIDDLE);
	key->setPosition(put_in->getPosition() + Vec2(30, -160));

	//设置按钮的权限根据账号密码改动
	key->addEventListener([&](Ref* ref, ui::TextField::EventType type)
		{
			//类型转换
			auto temp = dynamic_cast(ref);

			//初始化设定为账号和密码大于8位才能使用go按钮进行登录
			if (temp->getStringLength() > 8 && id->getStringLength() > 8) 
			{
				go->setEnabled(true);
			}
			else   //如果少了就设置为不可按
			{
				go->setEnabled(false);
			}
		});

	//设置按钮事件
	go->addTouchEventListener([&](Ref* ref, ui::Button::TouchEventType type)
		{
			if (type == Button::TouchEventType::ENDED)
			{
				Director::getInstance()->replaceScene(loding::createScene());
			}
		});
	go->setAnchorPoint(Vec2::ANCHOR_MIDDLE_TOP);
	go->setPosition(key->getPosition() + Vec2(0, -100));
	return true;
}
//转cocos可识别中文
char* TextFieldDemo::FontToUTF8(const char* font) {
	int len = MultiByteToWideChar(CP_ACP, 0, font, -1, NULL, 0);
	wchar_t* wstr = new wchar_t[len + 1];
	memset(wstr, 0, len + 1);
	MultiByteToWideChar(CP_ACP, 0, font, -1, wstr, len);
	len = WideCharToMultiByte(CP_UTF8, 0, wstr, -1, NULL, 0, NULL, NULL);
	char* str = new char[len + 1];
	memset(str, 0, len + 1);
	WideCharToMultiByte(CP_UTF8, 0, wstr, -1, str, len, NULL, NULL);
	if (wstr)delete[] wstr;
	return str;
}