Question

我正在尝试将NSDictionary数据放入表格视图中。但是我在访问值时遇到了问题。

字典看起来像这样：

multimedia =     {
        uploads =         {
            upload =             (
                                {
                    FileName =                     {
                        text = "\n      1-FB5A9792.MOV";
                    };
                    status =                     {
                        text = "\n      2";
                    };
                    Event =                     {
                        text = "\n      Test";
                    };
                    Date =                     {
                        text = "\n      9/7/2016 9:06:21 AM";
                    };
                    Publicacion =                     {
                        text = "\n      Example";
                    };
                    Seccion =                     {
                        text = "\n      Sistemas";
                    };
                    id =                     {
                        text = "\n  \n    \n      993";
                    };
                    text = "\n    ";
                },
                                {
                    FileName =                     {
                        text = "\n      2-FB5A9793.MOV";
                    };
                    status =                     {
                        text = "\n      2";
                    };
                    Event =                     {
                        text = "\n      Test";
                    };
                    Date =                     {
                        text = "\n      9/7/2016 9:06:21 AM";
                    };
                    Publicacion =                     {
                        text = "\n      Example";
                    };
                    Seccion =                     {
                        text = "\n      Sistemas";
                    };
                    id =                     {
                        text = "\n    \n      994";
                    };
                    text = "\n    ";
                },
                                {
                    FileName =                     {
                        text = "\n      1-IMG_0006.MOV";
                    };
                    status =                     {
                        text = "\n      2";
                    };
                    Event =                     {
                        text = "\n      Highest";
                    };
                    Date =                     {
                        text = "\n      9/7/2016 4:56:37 PM";
                    };
                    Publicacion =                     {
                        text = "\n      Example";
                    };
                    Seccion =                     {
                        text = "\n      Sistemas";
                    };
                    id =                     {
                        text = "\n    \n      995";
                    };
                    text = "\n    ";
                },...

我使用XMLReader将XML转换为Dictionary，然后将上述数据传递给tableData

 tableData = [jsonDictionary allKeys];

表

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return [tableData count];
}

创建单元格

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    ...
    NSString *key = [tableData objectAtIndex:indexPath.row];
    NSDictionary *dictionary = [jsonDictionary objectForKey:key];
    // get values from the dictionary and set the values for the displayed cell ...

    return cell;
}

我试图为每个FileName和状态值放置一个单元格，在这种情况下为每个FileName放置3个单元格。但我不知道该怎么做或得到FileName的数量。

这是XML

<multimedia>
  <uploads>
    <upload>
      <id>1136</id>
      <Date>9/9/2016 11:01:58 AM</Date>
      <FileName>IMG_0510.MOV</FileName>
      <status>2</status>
      <Publicacion>Example</Publicacion>
      <Seccion>Sistemas</Seccion>
      <Event>Q</Event>
    </upload>
  </uploads>
</multimedia>

Answer 1

在我看来，计数应该是1.

原始jsonDictionary只有一个项目。您应该更深入地进行上传，然后调用计数。

键@"upload"包含数组。因此，jsonDictionary[@"multimedia"][@"uploads"][@"upload"]应返回array。如果将其转换为NSDictionary，则会返回错误的结果，如果您尝试获取密钥File name的值，则会得到错误的结果。

字典的主要用途是您只有一个特定键值。这就是为什么如果将数组转换为File name，只能获得一个NSDictionary。

所以：

NSArray * array = _xmlDictionary[@"multimedia"][@"uploads"][@"upload"];
NSDictionary * onUpload = array[i];
NSDictionary * fileName = array[i][@"FileName"];
NSString * fileNameString = array[i][@"FileName"][@"text"];

所以在你的情况下：

tableData = jsonDictionary[@"multimedia"][@"uploads"][@"upload"];

然后

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    ...
    NSDictionary *upload = [tableData objectAtIndex:indexPath.row];
    NSString *fileName = upload[@"FileName"][@"text"];
    NSString *status = upload[@"status"][@"text"];
    NSString *event = upload[@"event"][@"text"];
    ...

    return cell;
}

Answer 2

获取以下数据：NSMutableArray *tableData = dict[@"multimedia"][@"uploads"][@"upload"];

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return [tableData count];
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    ...
    NSDictionary *upload = [tableData objectAtIndex:indexPath.row];
    // get values from the dictionary and set the values for the displayed cell ...

    NSString *event = upload[@"Event"][@"text"];
    event = [event stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
    cell.labelEvent.text = event;

    NSString *date = upload[@"Date"][@"text"];
    date = [date stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
    cell.labelDate.text  = date;  

    return cell;
}

Answer 3

我已将JSON放在本地JSON文件中并对其进行解析以显示结果。

所以你可以在获取字典后按照代码

所以你应该从这一行开始 NSArray *json = jsonTemp[@"multimedia"][@"uploads"][@"upload"];

jsonTemp包含您词典的所有数据。在我只显示文件名的代码中，您可以使用其他键来相应地显示其他数据。

这是我的代码：

- (void)loadJsonData
{
    NSString *filePath = [[NSBundle mainBundle] pathForResource:@"test" ofType:@"json"];
    NSData *jsonData = [[NSData alloc] initWithContentsOfFile:filePath];

    NSDictionary *jsonTemp = [NSJSONSerialization JSONObjectWithData:jsonData options:NSJSONReadingMutableLeaves error:nil];

    NSArray *json = jsonTemp[@"multimedia"][@"uploads"][@"upload"];

    for (NSDictionary *dictTemp in json) {
        [arrEvents addObject:dictTemp];
    }

    [tblView reloadData];
}

#pragma mark - TableView Delegate -
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
    return 1;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return [arrEvents count];
}

-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
    return 49;
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *simpleTableIdentifier = @"ListingIdentifier";

    UITableViewCell *cell = (UITableViewCell *)[tableView dequeueReusableCellWithIdentifier:simpleTableIdentifier];

    if (cell == nil) {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:simpleTableIdentifier];
    }

    NSDictionary *dictTemp = [arrEvents objectAtIndex:indexPath.row];
    NSString *fileName = dictTemp[@"FileName"][@"text"];

    cell.textLabel.text = [NSString stringWithFormat:@"File Name : %@", fileName];

    cell.backgroundColor = CLEAR_COLOR;
    cell.selectionStyle = UITableViewCellSelectionStyleNone;

    return cell;
}

输出：

希望有所帮助

快乐的编码......

将NSDictionary转换为UITableView

3 个答案: