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我想在我的表中添加一列。此列已添加到 SAP 系统的后端数据库中。当首次连接到 SAP 系统时，我还可以看到该值已填充到数据提取中。成功登录后，它运行材料提取功能模块并返回一列“价格”，我需要将其添加到我在 xcode 中的应用程序中。

请帮我。

错误：“以 NSException 类型的未捕获异常终止”由于未捕获异常“NSInvalidArgumentException”而终止应用程序，原因：“ * setObjectForKey：对象不能为 nil（键：itemPrice）”第一次抛出调用堆栈：

    if(!found){
            NSMutableDictionary *mDic = [[NSMutableDictionary alloc] init];
            [mDic setObject:[dic valueForKey:@"itemId"] forKey:@"itemId"];
            [mDic setObject:[dic valueForKey:@"itemR"] forKey:@"itemR"];
            [mDic setObject:[dic valueForKey:@"itemQty"] forKey:@"itemQty"];
            [mDic setObject:[dic valueForKey:@"itemDesc"] forKey:@"itemDesc"];
            [mDic setObject:[dic valueForKey:@"itemPack"] forKey:@"itemPack"];
            [mDic setObject:[dic valueForKey:@"itemUOM"] forKey:@"itemUOM"];
            [mDic setObject:[dic valueForKey:@"itemNACS"] forKey:@"itemNACS"];
            [mDic setObject:[dic valueForKey:@"itemPrice"] forKey:@"itemPrice"];  // This is where the error is occuring.
            int qty = [[dic valueForKey:@"itemQty"] intValue];
           // float price = [[dic valueForKey:@"itemPrice"] floatValue];
           // price = price * qty;
           // [mDic setObject:[NSString stringWithFormat:@"%.2f", price]  forKey:@"itemPrice"];

            mQty = qty;

            [mDic setObject:[dic valueForKey:@"itemLastSold"] forKey:@"itemLastSold"];
            [items addObject:mDic];
            [mDic release];
        }

Its actually not being retrieved from dic dictionary variable.

This is the code for adding that itemPrice to the table
 int mQty;
    //DELETE AND RE-ADD
    for (int i=0; i<[items count]; i++) {
        if([[dic valueForKey:@"itemId"] isEqualToString:[[items objectAtIndex:i] valueForKey:@"itemId"]]){
            NSLog(@"qty %@",[dic valueForKey:@"itemQty"]);
            int qty = [[dic valueForKey:@"itemQty"] intValue];

            qty = qty + [[[items objectAtIndex:i] valueForKey:@"itemQty"] intValue];
            NSDictionary *d =  [items objectAtIndex:i];
            NSLog([d description]);

            [[items objectAtIndex:i] setValue:[NSString stringWithFormat:@"%d", qty] forKey:@"itemQty"];
found = YES;
[items removeObjectAtIndex:i];
 NSMutableDictionary *mDic = [[NSMutableDictionary alloc] init];
            [mDic setObject:[dic valueForKey:@"itemId"] forKey:@"itemId"];
            [mDic setObject:[dic valueForKey:@"itemR"] forKey:@"itemR"];
            [mDic setObject:[NSString stringWithFormat:@"%d", qty] forKey:@"itemQty"];
            [mDic setObject:[dic valueForKey:@"itemDesc"] forKey:@"itemDesc"];
            [mDic setObject:[dic valueForKey:@"itemPack"] forKey:@"itemPack"];
            [mDic setObject:[dic valueForKey:@"itemUOM"] forKey:@"itemUOM"];
            [mDic setObject:[dic valueForKey:@"itemNACS"] forKey:@"itemNACS"];
            [mDic setObject:[dic valueForKey:@"itemPrice"] forKey:@"itemPrice"];  //added price column
 mQty = qty;
            [mDic setObject:[dic valueForKey:@"itemLastSold"] forKey:@"itemLastSold"];
//            [items insertObject:mDic atIndex:0];
            [items addObject:mDic];
            [mDic release];

            break;
}
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1 回答 1

0

您不能将 nil 放入 NSMutableDictionary。如果 dic 可能没有此密钥，则需要执行以下操作以防止崩溃：

if ([dic valueForKey:@"itemPrice"] != nil) {
    [mDic setObject:[dic valueForKey:@"itemPrice"] forKey:@"itemPrice"];
}

或者，您需要调查为什么 dic 不包含 itemPrice 键。

于 2013-10-24T18:02:39.543 回答