JSON数据，编辑方式

Posted 2023-03-15

【中文标题】JSON数据，编辑方式

【英文标题】：JSON data, the way to edit it

【发布时间】：2014-10-06 14:57:05

【问题描述】：

我需要获取 json 数组并向其中添加一个元素，然后将其发回。我的问题是如何编辑 json 数组元素？我能找到的唯一方法：

[firstElm addEntriesFromDictionary:[[forTheDopOp objectForKey:@"blablabla"] objectAtIndex:1]];
    NSDictionary * dic = [NSDictionary dictionaryWithObject:DateAndTime forKey:@"value"];
    [firstElm addEntriesFromDictionary:dic];
    [order addObject:firstElm];
    [secondElm addEntriesFromDictionary:[[forTheDopOp objectForKey:@"blablabla"] objectAtIndex:2]];
    NSDictionary * dic1 = [NSDictionary dictionaryWithObject:backDateAndTime forKey:@"value"];
    [secondElm addEntriesFromDictionary:dic1];
    [orderOpSender addObject:secondElm];

但是如果我需要循环执行它就行不通

for (int i = 0; i < [[[[forTheDopOp objectForKey:@"blablabla"] objectAtIndex:3] objectForKey:@"option_value"] count]; i++) 
        [valuesElm addEntriesFromDictionary:[[[[forTheDopOp objectForKey:@"blablabla"] objectAtIndex:3] objectForKey:@"blablabla"] objectAtIndex:i]];
        NSDictionary * dic = [NSDictionary dictionaryWithObject:[[[[[forTheDopOp objectForKey:@"blablabla"] objectAtIndex:3] objectForKey:@"blablabla"] objectAtIndex:i] objectForKey:@"name"] forKey:@"value"];
        [valuesElm addEntriesFromDictionary:dic];
        [orderOp addObject:valuesElm];
    

最后我得到了一个相同元素的数组。

我的 json 示例：

 "product_id": 83, "firstname":"111", "lastname": "222", "email": "[e-mail]", "telephone":"089234","options":[

"name":"\u0414\u0430\u0442\u0430 \u043f\u043e\u043b\u0443\u0447\u0435\u043d\u0438\u044f",
"type":"datetime",
"option_value":"",
"required":"1",
"value": "2014-09-01 9:10",
"product_option_id":"263",
"option_id":"15"
,
    
"name":"\u0414\u0430\u0442\u0430 \u0432\u043e\u0437\u0432\u0440\u0430\u0442\u0430",
"type":"datetime",
"option_value":"",
"required":"1",
"product_option_id":"264",
"value": "2014-10-01 10:10",
"option_id":"16"

我可以立即在选项中添加字符串吗？

【问题讨论】：

将 JSON 解析为 NSArrays/NSDictionarys，根据需要进行更新，然后序列化回 JSON。解析时一定要指定“可变容器”选项。

如前所述，你无法说出你想要什么。

【参考方案1】：

如果你想编辑你的值，你应该使用 NSMutableDictionary

【讨论】：

你能给我举个例子 firstElm 和 secondElm 是一个 NSMutableDictionary

我不确定我是否理解您的问题。也许这可以帮助你***.com/questions/6931104/…

使用 NSJSONSerialization 解析时指定“可变容器”选项。

【参考方案2】：

试试这个：

NSMutableArray *newForTheDopOp = [[NSMutableArray alloc]init];
for(NSDictionary *option in forTheDopOp[@"options"]))
   NSLog(@"option = %@", option);
   NSMutableDictionary *newOption = [[NSMutableDictionary alloc] init];
   [newOption addEntriesFromDictionary:option];
   [newOption setObject:@"test" forKey:@"option_value"];
   [newForTheDopOp addObject:newOption];
   NSLog(@"newOption = %@", newOption);

NSLog(@"newForTheDopOp = %@", newForTheDopOp);

【讨论】：

这将附加一个以somekey为键的对值，然后将修改后的数据添加到一个名为jsonModifiedOptions的NSMutableArray

*** 由于未捕获的异常“NSInternalInconsistencyException”而终止应用程序，原因：“-[__NSCFDictionary setObject:forKey:]: mutating method sent to immutable object”

@lhawks 它需要是一个可变数组，就像我的代码 NSMutableDictionary *data 你不能更改 NSArray

NSMutableArray *jsonModifiedOptions = [[NSMutableArray alloc] init]; for (NSMutableDictionary *data in [[[forTheDopOp objectForKey:@"options"] objectAtIndex:3] objectForKey:@"option_value"]) [data setObject:@"test" forKey:@"value"]; [jsonModifiedOptions addObject:data];

但是您访问的代码不同[[[forTheDopOp objectForKey:@"options"] objectAtIndex:3] objectForKey:@"option_value"]@lhawks