《如何使用 Cocos2D 2.X 制作基于 Tile 的游戏》使用 cocos2d V3 制作本教程

问题描述

我有一个小问题.在本教程中 如何使用 Cocos2D 2.X 制作基于 Tile 的游戏，使用 cocos2d V2.0，我想在 cocos2d V3.0 中制作.所以，它不起作用！谢谢！(我不会说英语)

I have a small problem. In this tutorial How To Make a Tile-Based Game with Cocos2D 2.X used cocos2d V2.0, I wanna make this in cocos2d V3.0. So, it doesn't work! Thanks! (I don't speak english)

我认为这行有问题 - self.position = viewPoint;

I think problem in this line - self.position = viewPoint;

@property (strong) CCTiledMap *tileMap;
@property (strong) CCTiledMapLayer *background;
@property (strong) CCSprite *player;



- (id)init
{
    // Apple recommend assigning self with supers return value
    self = [super init];
    if (!self) return(nil);

    // Enable touch handling on scene node
    self.userInteractionEnabled = YES;

    self.tileMap = [CCTiledMap tiledMapWithFile:@"TileMap.tmx"];
    self.background = [_tileMap layerNamed:@"Background"];
    [self addChild:_tileMap z:-1];

    CCTiledMapObjectGroup *objectGroup = [_tileMap objectGroupNamed:@"Objects"];
    NSAssert(objectGroup != nil, @"tile map has no objects object layer");

    NSDictionary *spawnPoint = [objectGroup objectNamed:@"SpawnPoint"];
    int x = [spawnPoint[@"x"] integerValue];
    int y = [spawnPoint[@"y"] integerValue];

    _player = [CCSprite spriteWithImageNamed:@"Player.png"];
    _player.position = ccp(x,y);

    [self addChild:_player];
    [self setViewPointCenter:_player.position];

    // done
    return self;
}


- (void)setViewPointCenter:(CGPoint) position {

    CGSize winSize = [CCDirector sharedDirector].viewSize;

    int x = MAX(position.x, winSize.width/2);
    int y = MAX(position.y, winSize.height/2);
    x = MIN(x, (_tileMap.mapSize.width * _tileMap.tileSize.width) - winSize.width / 2);
    y = MIN(y, (_tileMap.mapSize.height * _tileMap.tileSize.height) - winSize.height/2);
    CGPoint actualPosition = ccp(x, y);

    CGPoint centerOfView = ccp(winSize.width/2, winSize.height/2);
    CGPoint viewPoint = ccpSub(centerOfView, actualPosition);

    self.position = viewPoint;
}

-(void)touchBegan:(UITouch *)touch withEvent:(UIEvent *)event
{
    CGPoint touchLocation = [touch locationInView:touch.view];
    touchLocation = [[CCDirector sharedDirector] convertToGL:touchLocation];
    touchLocation = [self convertToNodeSpace:touchLocation];

    CGPoint playerPos = _player.position;
    CGPoint diff = ccpSub(touchLocation, playerPos);

    if ( abs(diff.x) > abs(diff.y) ) {
        if (diff.x > 0) {
            playerPos.x += _tileMap.tileSize.width;
        } else {
            playerPos.x -= _tileMap.tileSize.width;
        }
    } else {
        if (diff.y > 0) {
            playerPos.y += _tileMap.tileSize.height;
        } else {
            playerPos.y -= _tileMap.tileSize.height;
        }
    }

    CCLOG(@"playerPos %@",CGPointCreateDictionaryRepresentation(playerPos));

    // safety check on the bounds of the map
    if (playerPos.x <= (_tileMap.mapSize.width * _tileMap.tileSize.width) &&
        playerPos.y <= (_tileMap.mapSize.height * _tileMap.tileSize.height) &&
        playerPos.y >= 0 &&
        playerPos.x >= 0 )
    {
        [self setPlayerPosition:playerPos];
    }

    [self setViewPointCenter:_player.position];
    NSLog(@"%@", NSStringFromCGPoint(touchLocation));
}

-(void)setPlayerPosition:(CGPoint)position {
    _player.position = position;
}

推荐答案

问题是用户交互的区域默认绑定到场景的contentSize(屏幕大小).

The problem is that the area of the user interaction is by default bound to the contentSize of the scene (screen size).

当调用 setViewPointCenter 方法时，您将场景位置移出未处理触摸事件的区域.

When calling your setViewPointCenter method, you are moving the scene position out of this area where the touch event is not handled.

你必须像这样扩展瓦片地图的 contentSize 的这个区域:

You have to extend this area of the contentSize of the tile map like that :

[self setContentSize:[_tileMap contentSize]];
self.userInteractionEnabled = YES;

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