如何从具有多个数组的字典中获取特定键并存储到放置在表格视图单元格中的字符串中

Posted 2023-03-04

【中文标题】如何从具有多个数组的字典中获取特定键并存储到放置在表格视图单元格中的字符串中

【英文标题】：How to fetch a specific key from a dictionary having multiple arrays and store into string placed in table view cell

【发布时间】：2018-06-14 07:32:38

【问题描述】：

这是放置在tableView单元格中的标签，名称为a，b，c，d

//Want to store passenger_no here
    cell.a.text; 
//Want to store depart_city here
    cell.b.text; 
//Want to store name here
cell.d.text; 

这里是获取 JSON 数据并存储到名称数组的数组中，并将该数组存储到名为 dict 的字典中

NSArray *array = [_json valueForKey:@"result"];
NSDictionary *dict = array[indexPath.row];

JSON 看起来像这样：

 "result": [
         "passenger_no": 4,
          "destination_detail": [
                 "depart_city": "Indira Gandhi International"],
          "aircraft_info": [ "name": "CEAT 450"]
]

【参考方案1】：

在cellForRowAtIndexPath: 方法中，您可以将获取的值分配给单元格中的文本标签，如下所示：

NSArray *array = [_json valueForKey:@"result"];
NSDictionary *dict = array[indexPath.row];

//Want to store passenger_no here
cell.a.text = [dict valueForKey:@"passenger_no"];

//Want to store depart_city here
NSArray *destinationDetails = [dict valueForKey:@"destination_detail"];
NSDictionary *departcityInfo = destinationDetails.firstObject;
cell.b.text = [departcityInfo valueForKey:@"depart_city]"

//Want to store name here
NSArray *aircraftInfoList = [dict valueForKey:@"aircraft_info"];
NSDictionary *aircraftInfo = aircraftInfoList.firstObject;
cell.d.text = [aircraftInfo valueForKey:@"name"];

PS.在现代Objective-C语法中，您可以通过dict[@""passenger_no"]而不是[dict valueForKey:@"passenger_no"]访问NSDictionary的值。

希望这会有所帮助！

【参考方案2】：

所以在cellforrowatindexpath 你的代码将如下所示

NSDictionary *dict = array[indexPath.row];
    NSArray *destinationdetailarray = [dict valueForKey:@"destination_detail"];
    NSString *departcity = [[destinationdetailarray firstObject]valueForKey:@"depart_city"];
    NSString *passengerno = [NSString stringWithFormat:@"%@",[dict valueForKey:@"passenger_no"]];
    NSArray *aircraftinfo = [dict valueForKey:@"aircraft_info"];
    NSString *name = [[aircraftinfo firstObject]valueForKey:@"name"];