将CCMenu与网格对齐

Question

有人知道让CCMenuItems数组与网格对齐的最佳实践方法吗？这是一个cocos2d问题

例如：

int levelCount = 10;

CCMenu *menuArray = [CCMenu menuWithItems:nil];

for (int x = 1; x<=levelCount; x++) {
    CCLOG(@"Creating level icon for Level %i", x);     
    [menuArray addChild:[CCMenuItemImage itemFromNormalImage:@"Button2n.png" 
                                               selectedImage:@"Button2s.png" 
                                                      target:self 
                                                    selector:@selector(onPlay:)]];

}

[menuArray alignToGridWouldbeGreat????!!!!];
[self addChild:menuArray];

我可以在列或行中垂直、水平对齐，但不能包装列或行配置。

提前感谢！

Answer 1

您只需调用其中一个重载的alignItemsInColumns或alignItemsInRows方法。例如，如果您有15个菜单项，并且想要3行5列，请执行以下操作：

CCMenu* menu = [CCMenu menuWithItems:...];
NSNumber* itemsPerRow = [NSNumber numberWithInt:5];
[menu alignItemsInColumns:itemsPerRow, itemsPerRow, itemsPerRow, nil];

唯一的缺点是，在对齐到网格时，似乎没有一种方法来设置填充。

Answer 2

好吧，虽然不像我想的那样灵活，但我已经有了一个足够好的解决方案来满足我的目的。如果其他任何人也觉得这段代码有用，他们可以随意使用它。

//////// Put images (or whatever) for all levels in an array /////////        

    int levelCount = 15;
    NSMutableArray* menuArray = [NSMutableArray arrayWithCapacity:levelCount];
    for (int x = 1; x<=levelCount; x++) {

        CCLOG(@"Creating level icon for Level %i", x);

        CCMenuItemImage* item = [CCMenuItemImage itemFromNormalImage:@"Button2n.png" 
                                                       selectedImage:@"Button2s.png" 
                                                              target:self 
                                                            selector:@selector(onPlay:)];
        [menuArray addObject:item];                        
    }

/以特定列数排列网格/

    CGSize screenSize = [CCDirector sharedDirector].winSize;

    int columns = 5;

    int spaceBetweenColumns = columns + 1;

    int spacing = screenSize.width / spaceBetweenColumns;

    CCLOG(@"screenWidth (%f) / columnsWithEdges (%i) = spacing = %i, ", screenSize.width, spaceBetweenColumns, spacing);

    CGPoint currentDrawPoint = CGPointMake(0, screenSize.height - spacing);  // start at the top 

    for (CCMenuItem *item in menuArray) {

        currentDrawPoint.x = currentDrawPoint.x + spacing;

        if (currentDrawPoint.x > (columns * spacing)) {
            // start a new line as we have reached the end of the previous one
            currentDrawPoint.x = spacing;
            currentDrawPoint.y = currentDrawPoint.y - spacing;
        }

        item.position = currentDrawPoint;
        [self addChild:item];

    }

Answer 3

这是我的解决方案，我希望它能有所帮助。

首先在某个地方定义这个结构：

typedef struct
{
 int cols;
}RowInfo;

然后：

-(void)layoutMenu:(CCMenu *)menu rowInfo:(RowInfo[])inf rows:(int)rows padding:(CGPoint)padding     
{
CCMenuItem *dummy = (CCMenuItem *)[menu.children objectAtIndex:0];
int itemIndex = 0;

float w = dummy.contentSize.width;
float h = dummy.contentSize.height;

CGSize screenSize = [[CCDirector sharedDirector]winSize];
CCArray *items = [menu children];

float startX;

for (int i = rows - 1; i >=0; i--)
{
    int colsNow = info[i].cols;

    startX = (screenSize.width - (colsNow * w + padding.x * (colsNow - 1)))/2;
    float y = i * (padding.y + h);

    for (int j = 0; j < colsNow; j++)
    {
        CCMenuItem *item = (CCMenuItem *)[items objectAtIndex:itemIndex];
        item.anchorPoint = ccp(0,0);
        item.position = ccp(startX, y);
        startX += padding.x + w;
        itemIndex++;
    }
}
}

调用是这样的(一个自定义键盘)：

//create custom keyboard
NSArray *captions = [NSArray arrayWithObjects:
@"Q", @"W", @"E", @"R", @"T", @"Y", @"U", @"I", @"O", @"P",
   @"A", @"S", @"D", @"F", @"G",@"H", @"J", @"K", @"L",
     @"Z", @"X", @"C", @"V", @"B", @"N", @"M", nil];

CCMenu *menu = [CCMenu menuWithItems:nil];

[self addChild:menu];

for (NSString *caption in captions)
{
    CCLabelTTF *label = [CCLabelTTF labelWithString:caption fontName:@"Courier" fontSize:25];
    CCMenuItemLabel *item = [CCMenuItemLabel itemWithLabel:label target:self selector:@selector(callDelegate:)];
    [menu addChild:item];
}

RowInfo info[3] = {{7}, {9}, {10}}; //inverse order

[self layoutMenu:menu withRowInfo:info rows:3 padding:ccp(15, 15)];