CCDictionaryを保持しているCCArrayやCCDictionaryのソート

CCArraySort.cpp

void CCArraySort::test()
{
    // ソート対象がCCArrayの場合
    auto table = makeDummyList();
    std::sort(table->data->arr, table->data->arr + table->data->num, compare);
    
    // 確認ログ
    CCObject* item;
    CCARRAY_FOREACH(table, item) {
        auto row = (CCDictionary *)item;
        CCLog("name:%s - price:%s", 
        ((CCString *)row->objectForKey("name"))->getCString(), 
        ((CCString *)row->objectForKey("price"))->getCString());
    }
    
    // ソート対象がCCDictionaryの場合
    auto table2 = makeDummyList2();
    // 一旦全部取り出し
    CCArray *values = CCArray::create();
    CCDictElement *elem;
    CCDICT_FOREACH(table2, elem) {
        values->addObject(elem->getObject());
    }
    // ほいでソート
    std::sort(values->data->arr, values->data->arr + values->data->num, compare);
    
    // 確認ログ
    CCLog("-----------------------");
    CCARRAY_FOREACH(values, item) {
        auto row = (CCDictionary *)item;
        // キーが欲しいなら
        auto key = table2->allKeysForObject(row);
        // 全く同じデータをもつのが複数いたら判別できなさげ
        CCLog("name:%s - price:%s [key:%s]",
              ((CCString *)row->objectForKey("name"))->getCString(),
              ((CCString *)row->objectForKey("price"))->getCString(),
              ((CCString *)key->objectAtIndex(0))->getCString());
    }
    
}

// 比較用メソッド (static定義)
bool CCArraySort::compare(cocos2d::CCObject *a, cocos2d::CCObject *b)
{
    CCDictionary *friendA = (CCDictionary*)a;
    CCDictionary *friendB = (CCDictionary*)b;
    
    return ((CCString *)friendA->objectForKey("price"))->intValue() > ((CCString *)friendB->objectForKey("price"))->intValue();
    // 昇順は比較演算子を変えればok
    //return ((CCString *)friendA->objectForKey("price"))->intValue() < ((CCString *)friendB->objectForKey("price"))->intValue();
}

// ダミーデータ作成(CCArray)
CCArray* CCArraySort::makeDummyList()
{
    auto arr = CCArray::create();
    
    /* こんなテーブル想定
     | name   | price |
     | ------ | ----- |
     | item 0 |    10 |
     | item 1 |    50 |
     | item 2 |    10 |
     | item 3 |   100 |
     | item 4 |    30 |
     */
    auto prices = CCArray::create(CCString::create("10"),
                                  CCString::create("50"),
                                  CCString::create("10"),
                                  CCString::create("100"),
                                  CCString::create("30"),
                                  NULL);
    
    CCDictionary *item;
    for (int i = 0; i < 5; i++) {
        item = CCDictionary::create();
        item->setObject(CCString::createWithFormat("item %d", i), "name");
        item->setObject(prices->objectAtIndex(i), "price");
        arr->addObject(item);
    }
    
    return arr;
}

// ダミーデータ作成(CCDictionary データ中身は一緒)
CCDictionary* CCArraySort::makeDummyList2()
{
    auto dic = CCDictionary::create();
    
    /* こんなテーブル想定
     | name   | price |
     | ------ | ----- |
     | item 0 |    10 |
     | item 1 |    50 |
     | item 2 |    10 |
     | item 3 |   100 |
     | item 4 |    30 |
     */
    auto prices = CCArray::create(CCString::create("10"),
                                  CCString::create("50"),
                                  CCString::create("10"),
                                  CCString::create("100"),
                                  CCString::create("30"),
                                  NULL);
    
    CCDictionary *item;
    for (int i = 0; i < 5; i++) {
        item = CCDictionary::create();
        item->setObject(CCString::createWithFormat("item %d", i), "name");
        item->setObject(prices->objectAtIndex(i), "price");
        
        dic->setObject(item, CCString::createWithFormat("key-%d", i)->getCString());
    }
    
    return dic;
}

log.txt

## 出力ログ

Cocos2d: name:item 3 - price:100
Cocos2d: name:item 1 - price:50
Cocos2d: name:item 4 - price:30
Cocos2d: name:item 0 - price:10
Cocos2d: name:item 2 - price:10
Cocos2d: -----------------------
Cocos2d: name:item 3 - price:100 [key:key-3]
Cocos2d: name:item 1 - price:50 [key:key-1]
Cocos2d: name:item 4 - price:30 [key:key-4]
Cocos2d: name:item 0 - price:10 [key:key-0]
Cocos2d: name:item 2 - price:10 [key:key-2]