未找到 Cocos2d 2.0 实例方法；接收者是前锋类

Question

我的 GameScene.m 文件：

#import "GameScene.h"

// Needed to obtain the Navigation Controller
#import "AppDelegate.h"

#pragma mark - GameScene

// GameScene implementation
@implementation GameScene

// on "init" you need to initialize your instance
-(id) init
{
self = [super init];
if (self != nil)
{
    [self addChild:[GameLayer node]];
}
return self;
}


- (void) dealloc
{
[super dealloc];
}

@end
@implementation GameLayer
@synthesize hero;

-(id) init
{
if( (self=[super init] )) 
{
    hero = [[Hero alloc] initWithGame:self];
}
return self;
}

-(void) dealloc
{
[super dealloc];
}

@end

我的 GameScene.h 文件：

#import <GameKit/GameKit.h>

// When you import this file, you import all the cocos2d classes
#import "cocos2d.h"

// GameScene
@interface GameScene : CCScene 
{
}

@end

@class Hero;

@interface GameLayer : CCLayer
{
Hero * _hero;

NSMutableArray * _bullets;
bool _playerFiring;

NSMutableArray * _enemies;
float _lastTimeEnemyLaunched;
float _enemyInterval;

int _score;
int _lives;
int _bombs;
int _level;
}

@property (nonatomic,retain) Hero * hero;
@property (nonatomic,readwrite) bool playerFiring;
@property (nonatomic,readwrite) float lastTimeEnemyLaunched;
@property (nonatomic,readwrite) float enemyInterval;
@property (nonatomic,retain) NSMutableArray * enemies;
@property (nonatomic,retain) NSMutableArray * bullets;
@property (assign,readwrite) int score;
@property (assign,readwrite) int lives;
@property (assign,readwrite) int bombs;
@property (assign,readwrite) int level;

@end

我的 Hero.h 文件：

#import <Foundation/Foundation.h>
#import "cocos2d.h"
#import "GameScene.h"

@class GameLayer;

@interface Hero : CCNode
{
CCSprite * mySprite;
GameLayer * theGame;
float _lastTimeFired;
float _fireInterval;
float _firingSpeed;
float _movementSpeed;
}

@property (nonatomic,retain) CCSprite * mySprite;
@property (nonatomic,retain) GameLayer * theGame;
@property (nonatomic,readwrite) float lastTimeFired;
@property (nonatomic,readwrite) float fireInterval;
@property (nonatomic,readwrite) float firingSpeed;
@property (nonatomic,readwrite) float movementSpeed;

@end

还有我的 Hero.m 文件：

#import "Hero.h"

@implementation Hero

@synthesize theGame,mySprite;

-(id) initWithGame:(GameLayer *)game
{
self = [super init];
if(self != nil)
{

    // ask director for the window size
    CGSize size = [[CCDirector sharedDirector] winSize];

    self.theGame = game;
    mySprite = [CCSprite spriteWithFile:@"hero.png"];
    [theGame addChild:mySprite z:2];
    [mySprite setPosition:ccp(size.width/2,50)];

    self.lastTimeFired = 0;
    self.fireInterval = 3;
    self.firingSpeed = 10;
    self.movementSpeed = 5;

}
return self;
}

-(void) dealloc
{
[super dealloc];
}

@end

这是我的问题：我收到两个警告 - 1.“未找到实例方法 -initWithGame（返回类型默认为 'id'）”和 2.“接收者 'Hero' 是一个转发类，对应的 @interface 可能不是存在”

我尝试在 Hero.h 界面中添加“-(id) initWithGame:(GameLayer *)game” 行，但它不起作用。我尝试添加该行，但使用 + 而不是 -，但什么也没有。

我最终没有在屏幕上显示我的英雄。有谁知道如何解决这个问题（我使用的是最新版本的 Xcode）？

Answer 1

在GameScene.m，你应该

#import "Hero.h"

这解释了为什么您会收到“前向类”警告：由于您没有导入标头，因此编译器在 GameScene 编译单元中唯一知道的就是前向声明。

一旦你这样做了，如果你还在 Hero.h 中声明了initWithGame，那么你将不会收到任何警告。