Use of common classes in cocos2d_x_03 _

Cocos2d-x cocos2d C ++ closure callback

I. Use of textfieldttf input box

# Pragma mark-custom method // custom method, add a textfieldvoid textfieldscene: addonetextfield (float X, float y) {textfieldttf * field = textfieldttf :: textfieldwit2d-aceholder ("Enter:", "", 50); field-> setposition (x, y); // Add the genie to the current layer this-> addchild (field ); // 2. instantiate a touch listener object auto listener = eventlistenertouchonebyone: Create (); // bind a closure function when the touch starts; // [] indicates the external object to be passed in. Field // () indicates the parameter listener-> ontouchbegan = [field] (touch * t, event * E) {// getlocation returns an OpenGL coordinate. // If the clicked vertex is in textfield, if (field-> getboundingbox () is allowed (). containspoint (t-> getlocation () {field-> attachwithime ();} else {field-> detachwithime ();} return false ;}; // 3. Get the event distributor and add an event listener to this. That is, listen to the Field object [text input box] Director: getinstance ()-> geteventdispatcher () -> addeventlistenerwithscenegraphpriority (listener, field );}

Ii. Custom class ball, inherited from spriteball. h
Create_func (type) Macro
Ball. cppinit method implementation
You can use a custom class in the home scenario to create an instance object either in the onenter () method or in Init () Method

3, Cocos2d-x memory management reference count recommended: when using, first retain, use release not recommended: delete simplified operation: After the creation is complete, use autorelease (); iv. Menu usage
Method 2: Set the callback function as a closure function. It belongs to the callback function type defined in the latest feature menu item of C ++ 11 as follows:

2nd Methods: Set the callback method for the menu item through the macro
Cc_callback_1 macro
Callback method declaration in. h file
Implementation of callback methods in. cpp files
V. Use of tableview
Import the cocos2d-x extension header file containing cctableview. h
Scenario inherited from datasouce and delegate
The following is the data source method declaration.
The following table view proxy Declaration
Instantiate a tableview
Complete header file for the entire scenario
Implementation of the entire scenario. cpp File

/// Tableviewscene. CPP // 01_cocos2d-x // created by beyond on 14-10-4. # include "tableviewscene. H "scene * tableviewscene: createscene () {// 'Scene 'is automatically released // create a scene auto scene = scene: Create (); // 'player' Automatically releases auto layer = tableviewscene: Create (); // adds a layer to the scene-> addchild (layer ); // return scene for the scenario where the layer is filled;} // In the "init" method, instantiate the bool tableviewscene: Init () {// 1. call the init of the parent class, CPP does not have s Uper, directly write the parent class name if (! Layer: Init () return false; // screen size winsize = Director: getinstance ()-> getvisiblesize (); // Add a tableview size = size (300,300); tableview * TV = tableview: Create (this, size); // set the TV-> setanchorpoint (point (0, 0); // set the position TV-> setposition (winsize. width/2, winsize. height/2); // set the proxy TV-> setdelegate (this); // Add it to this addchild (TV); Return true ;} # pragma mark-data source method // The following are all data source methods // total number of rows ssize_t tableviewscene: numberofcellsintableview (tableview * Table) {return 7 ;} // size of each row tableviewscene: tablecellsizeforindex (tableview * Table, ssize_t idx) {return size (300, 60);} // celltableviewcell * tableviewscene of each row :: tablecellatindex (tableview * Table, ssize_t idx) {// reuse mechanism, which is obtained from the cache pool first and cannot be obtained before tableviewcell * cell = table-> dequeuecell (); labelttf * label; if (cell = NULL) {// create a cell = tableviewcell: Create (); // create a new label Label = labelttf: Create (); // bind the tag label-> settag (5267); // set the font size label-> setfontsize (30); // set the anchorpoint label-> setanchorpoint (point (0, 0); // Add it to the cell-> addchild (Label);} else {// directly retrieve the label in the cell and assign a new label = (labelttf *) cell-> getchildbytag (5267);} STD: String arr [] = {"Baoyu", "Daiyu", "Baochai", "Xiangyun", "Spring ", "Miao Yu", "Qing Wen"}; // set the label content label-> setstring (stringutils: Format ("label % lD, % s", idx, arr [idx]. c_str (); // return the unique Cell Return cell;} # pragma mark-proxy method // The following are all proxy Methods // call void tableviewscene upon clicking :: tablecelltouched (tableview * Table, tableviewcell * cell) {labelttf * label = (labelttf *) cell-> getchildbytag (5267); STD: String content = stringutils :: format ("n rows clicked, content: % s", label-> getstring (). c_str (); MessageBox (content. c_str (), "title ");}

Focus:

Stringutils: Format (); <span style = "color: RGB (57, 57, 57); font-family: 'courier new'; font-size: 24px; line-Height: 32px; Background-color: RGB (245,245,245); "> <strong> method </strong> </span>

<Span style = "color: RGB (57, 57, 57); font-family: 'courier new'; font-size: 24px; line-Height: 32px; background-color: RGB (245,245,245); "> <strong> the returned STD: String object can be passed through c_str () </strong> </span> <span style = "font-family: 'courier new'; Background-color: RGB (245,245,245 ); "> convert the method to a C string </span>

Focus: reuse mechanism
Tablecelltouched is equivalent to didslectedrowatindexpath in IOS

Use of common classes in cocos2d_x_03 _