添加和删​​除子节点错误

Question

我在CCNode中添加和删除CCScrollView，如下所示：

-(void)openShop
{
    CCNode *shopNode = [CCBReader loadAsScene:@"Shop"];
    CCScrollView *scroll = [[CCScrollView alloc]initWithContentNode:shopNode];
    if (visible == NO) {
        [shopNode setContentSizeInPoints:(CGSizeMake(320, 1000))];
        [scrollContainer addChild:scroll];
        [scroll setContentSizeInPoints:(CGSizeMake(320.0, 370.0))];
        [scroll setHorizontalScrollEnabled:NO];
        [scroll setPosition:(CGPointMake(0, 70))];
        [scroll setScrollPosition:(CGPointMake(0, 0))];
        visible = YES;
    } else {
        [scrollContainer removeChild:scroll];
        visible = NO;
    }
}

一切正常，但当我openShop运行removeChild:scroll时，程序崩溃并返回此错误：Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'This node does not contain the specified child.'我不明白，因为scroll显然添加到孩子..那么scrollContainer如何不包含scroll？

Answer 1

看看你的代码，它告诉你答案。您创建滚动并在创建后立即询问'确实包含滚动：当然没有任何内容包含它，因为您尚未将其添加到任何内容中。相反，试试这个：

-(void)openShop
{    
     if([scrollContainer containsChildByName:@"scrollName" recursively:NO]) {
         [scrollContainer removeChildByName:@"scrollName"];
         visible = NO;
     } else {
         CCNode *shopNode = [CCBReader loadAsScene:@"Shop"];
         CCScrollView *scroll = [[CCScrollView alloc]initWithContentNode:shopNode];
         [shopNode setContentSizeInPoints:(CGSizeMake(320, 1000))];
         [scrollContainer addChild:scroll z:0 name:@"scrollName"];
         [scroll setContentSizeInPoints:(CGSizeMake(320.0, 370.0))];
         [scroll setHorizontalScrollEnabled:NO];
         [scroll setPosition:(CGPointMake(0, 70))];
         visible = YES;
     }
}

使用任何cocos2d的CCNode后代的'name'属性对您有利。我假设你使用的是cocos的3.x版。

ob p：obcit：从内存来看，不确定这会编译，但它会给你一般的想法。