Cocos2d-x Series 4 common controls

1. Simple code analysis
Create a project and analyze the code

Main. cpp

int main(int argc, char **argv){    // create the application instance    AppDelegate app;    return Application::getInstance()->run();}

AppDelegate execution

Bool AppDelegate: applicationDidFinishLaunching () {// initialize ctor create ''auto ctor = director: getInstance (); auto glview = director-> getOpenGLView (); if (! Glview) {glview = GLView: create ("CGame"); ctor-> setOpenGLView (glview);} // turn on display FPS director-> setDisplayStats (true ); // set FPS. the default value is 1.0/60 if you don't call this ctor-> setAnimationInterval (1.0/60); // create a scene. it's an autorelease object Scene * scene = Scene: create (); // create a scenario Layer * layer = Layer: create (); // create a layer scene-> addChild (layer); // Add the layer to the scenario
Sprite * sprite = Sprite: create ("HelloWorld.jpg"); // create a sprite-> setAnchorPoint (Point (); // set the anchorpoint ), the default value is (0.5, 0.5); layer-> addChild (sprite); // Add sprite (sprite) to layer // run // director-> runWithScene (scene ); use runWithScene director-> runWithScene (scene) for the first time; // director-> replaceScene (); then use replaceScene return true ;}

2. text display and Input
> 1. LabelTTF text display label

Size size = Director: getInstance ()-> getVisibleSize (); // get the current screen Size LabelTTF * label = LabelTTF: create (); label-> setString ("Hello cocos2d-x"); label-> setFontSize (36); label-> setPosition (size. width/2, size. height/2); addChild (label); // Add a genie

> 2. TextFieldTTF text input label

Bool HelloWorld: init () {// 1. super init first if (! Layer: init () {return false;} Size size Size = Director: getInstance ()-> getVisibleSize (); TextFieldTTF * tf = TextFieldTTF :: textfieldwit2d-aceholder ("input here", "", 20); tf-> setPosition (size. width/2, size. height/2); addChild (tf); auto listener = EventListenerTouchOneByOne: create (); // [] the function closure is actually a code block and the tf variable cannot be accessed, to access tf, pass tf to the closure code block []; listener-> onTouchBegan = [tf] (Touch * t, Event * e) {if (tf-> getBoundingBox (). containsPoint (t-> getLocation () {tf-> attachWithIME ();} else {tf-> detachWithIME ();} return false ;}; // Add listener ctor:: getInstance ()-> getEventDispatcher ()-> addEventListenerWithSceneGraphPriority (listener, tf); return true ;}

> 3. Message prompt

• Log: log ("hello cocos2d-x % d", 200); // log can be output on each platform, usage is similar to printf ();
• Message pop-up box: MessageBox ("Message Title", "message content ");

3. Custom class
Since cocos2d is extended from objective-c, the encoding style of objective-c is extended. Let's look at a custom Sprite.
Ball. h

# Ifndef BALL_H # define BALL_H # include "cocos2d. h "using namespace cocos2d; class Ball: public cocos2d: Sprite {public: CREATE_FUNC (Ball); // macro constructor, Ball: create ();

Virtual bool init () {initWithFile ("Ball.jpg"); // in objective-c, an initialization method usually starts with init and returns true ;};}; # endif/* BALL_H */

 

    // create a scene. it's an autorelease object    auto scene = Scene::create();    auto b = Ball::create();    b->setPosition(200,200);    scene->addChild(b);    director->runWithScene(scene);

 

4. Use of TableView
TableView is similar to ListView in Android. It also includes the Adapter (TableViewDataSource) and the item Click Event (TableViewDelegate). Here is a simple example;
HelloWorldScene. h

#ifndef __HELLOWORLD_SCENE_H__#define __HELLOWORLD_SCENE_H__#include "cocos2d.h"#include "cocos-ext.h"USING_NS_CC_EXT;USING_NS_CC;class HelloWorld : public cocos2d::Layer,TableViewDataSource,TableViewDelegate{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();          // implement the "static create()" method manually    CREATE_FUNC(HelloWorld);    public:        virtual Size cellSizeForTable(TableView *table);        virtual TableViewCell* tableCellAtIndex(TableView *table, ssize_t idx);        virtual ssize_t numberOfCellsInTableView(TableView *table);    public:    virtual void scrollViewDidScroll(ScrollView* view){};       virtual void scrollViewDidZoom(ScrollView* view){};        virtual void tableCellTouched(TableView* table, TableViewCell* cell);};#endif // __HELLOWORLD_SCENE_H__

HelloWorldScene. cpp

# Include "HelloWorldScene. h "USING_NS_CC; Scene * HelloWorld: createScene () {// 'Scene 'is an autorelease object auto scene = scene: create (); // 'player' is an autorelease object auto layer = HelloWorld: create (); // add layer as a child to scene-> addChild (layer ); // return the scene return scene;} // on "init" you need to initialize your instancebool HelloWorld: init () {/////////////////////// //// // 1. super init first if (! Layer: init () {return false;} TableView * TV = TableView: create (this, Size (300,300); TV-> setAnchorPoint (Point (0, 0 )); // set the TV-> setPosition (); TV-> setDelegate (this); // set the row Click Event addChild (TV); return true;} Size HelloWorld :: cellSizeForTable (TableView * table) {// return the Size of each TableViewCell. return Size (300, 50);} TableViewCell * HelloWorld: tableCellAtIndex (TableView * table, ssize_t idx) {// return a TableViewCell, which is equivalent to the getView method TableViewCell * cell = table-> dequeueCell (); LabelTTF * label; if (cell = NULL) of the BaseAdapter in android) {cell = TableViewCell: create (); label = LabelTTF: create (); label-> setTag (2); label-> setFontSize (20 ); label-> setAnchorPoint (Point (0, 0); cell-> addChild (label);} else {label = (LabelTTF *) cell-> getChildByTag (2 );} label-> setString (StringUtils: format ("label % d", (int) idx); return cell;} ssize_t HelloWorld: numberOfCellsInTableView (TableView * table) {// return the number of rows in TableView return 100;} void HelloWorld: tableCellTouched (TableView * table, TableViewCell * cell) {// LabelTTF * label = (LabelTTF *) cell-> getChildByTag (2); log ("click % s", label-> getString (). c_str ());}

5. menu display

MenuItem * n1 = MenuItemImage: create ("normal.png", "press.png", [] (Ref * r) {log ("menu1 click ");}); menuItem * n2 = MenuItemImage: create ("press.png", "normal.png", [] (Ref * r) {log ("menu2 click ");}); // generate a menu and add the Click Event n1-> setPosition (Point (s. width/2-60, s. height/2-40); // The position of menu 1 n2-> setPosition (Point (s. width/2-60, s. height/2-100); // The position of menu 2: auto Menu = menu: create (n1, n2, NULL); // generate menu addChild (Menu );

 

 

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