Cocos2D:塔防游戏制作之旅(六)

概述现在,创建一个新的类用来表示炮塔.添加新的类文件,名称为Tower,继承于CCNode. 替换Tower.h文件为如下内容: #import "cocos2d.h"#import "HelloWorldLayer.h"#define kTOWER_COST 300@class HelloWorldLayer, Enemy;@interface Tower: CCNode {

现在,创建一个新的类用来表示炮塔.添加新的类文件,名称为Tower,继承于CCNode.

替换Tower.h文件为如下内容:

#import "cocos2d.h"#import "HelloWorldLayer.h"#define kTOWER_COST 300@class HelloWorldLayer,Enemy;@interface Tower: CCNode {    int attackRange;    int damage;    float fireRate;}@property (nonatomic,weak) HelloWorldLayer *theGame;@property (nonatomic,strong) CCSprite *mySprite;+(ID)nodeWithTheGame:(HelloWorldLayer*)_game location:(CGPoint)location;-(ID)initWithTheGame:(HelloWorldLayer *)_game location:(CGPoint)location;@end

现在将Tower.m替换为如下内容:

#import "Tower.h"@implementation Tower@synthesize mySprite,theGame;+(ID) nodeWithTheGame:(HelloWorldLayer*)_game location:(CGPoint)location{    return [[self alloc] initWithTheGame:_game location:location];}-(ID) initWithTheGame:(HelloWorldLayer *)_game location:(CGPoint)location{    if( (self=[super init])) {        theGame = _game;            attackRange = 70;            damage = 10;            fireRate = 1;            mySprite = [CCSprite spriteWithfile:@"tower.png"];        [self addChild:mySprite];            [mySprite setposition:location];            [theGame addChild:self];            [self scheduleUpdate];    }    return self;}-(voID)update:(ccTime)dt{}-(voID)draw{    ccDrawcolor4B(255,255,255);    ccDrawCircle(mySprite.position,attackRange,360,30,false);    [super draw];}@end

该炮塔类包含了一些属性:一个精灵,用来可视化表示一个炮塔;一个便于访问父节点的引用;以及3个变量:

攻击范围:确定炮塔可以攻击多远 伤害:确定炮塔可以造成敌人多少损伤 射击速率:确定炮塔重新装d射击需要间隔多长时间 总结

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