使用 AFNetworking 和模型类解析 JSON

Posted 2023-03-16

【中文标题】使用 AFNetworking 和模型类解析 JSON

【英文标题】：JSON parsing with AFNetworking and model Class

【发布时间】：2015-10-05 05:05:34

【问题描述】：

我在使用模型从 json 获取数据并将数据显示到我的应用程序时有点困惑。

我有这种 json 数据：

result 
 [
    
        key : value
        key : value
        key : value
    
    
        key : value
        key : value
        key : value
    
 ]

我正在尝试这种代码：

json = [[NSMutableArray alloc]init];
            NSError *writeError = nil;
            NSData *jsonData = [NSJSONSerialization dataWithJSONObject:responseObject options:NSJSONWritingPrettyPrinted error:&writeError];

            NSDictionary *dic = [NSJSONSerialization JSONObjectWithData:jsonData
                                                                options:NSJSONReadingMutableContainers
                                                                  error:&writeError];


            json = dic[@"Result"];
            int i;
            for (i = 0; i <= json.count; i++)
            
                NSMutableArray *array = json[i];
                [json enumerateObjectsUsingBlock:^(id obj, NSUInteger index, BOOL *stop)
                 
                     // Dim = [[DimEntityFull alloc]initWithJSONDictionary:obj];
                      saveSearch = [[SaveSearchMaster alloc]initWithJSONDictionary:obj];
                  ];
            

我正在使用“AFNetworking”，我正在尝试获取数据并存储到模型类中，然后显示到自定义单元格标签。

我怎样才能得到它。

谢谢。

【问题讨论】：

您是否尝试过在提取的每个阶段记录数据？

是的，但它对我不起作用。我对如何存储到模型类有点困惑。

我知道 arrayOfRecords = [jsonData objectForKey:@"result"];然后 cell.lblName.text = [[arrayOfRecords objectAtIndex:indexPath.row]valueForKey:@"name"];是正确的流程。但是使用模型类我怎样才能得到相同的结果？

【参考方案1】：

在您的视图控制器中

- (void)viewDidLoad

    [super viewDidLoad];


    [self getUsersList];


-(void)getUsersList




    AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
    manager.responseSerializer = [AFJSONResponseSerializer serializer];
    manager.responseSerializer.acceptableContentTypes = [NSSet setWithObject:@"application/json"];
    [manager POST:[NSString stringWithFormat:@"http://www.yourdomainname.com/getUserList"] parameters:nil success:^(AFHTTPRequestOperation *operation, id responseObject)
    

        //we will add Modal class objects of users in this array

        usersArray=[[NSMutableArray alloc]init];

        //getting result dictionary from response
        NSDictionary *resultDictinary = [responseObject objectForKey:@"result"];
        for (NSDictionary *userDictionary in resultDictinary)
        
            //allocating new user from the dictionary
            User *newUSer=[[User alloc]initWithDictionary:userDictionary];
            [usersArray addObject:newUSer];
        

        //in users array, you have objects of User class

        //reload your tableview data
        [self.TableView reloadData];


     failure:^(AFHTTPRequestOperation *operation, NSError *error) 
        NSLog(@"Error: %@", error);
    ];

现在创建名为“用户”的新文件 在User.h

@interface User : NSObject

    NSString *userID;
    NSString *firstName;
    NSString *lastName;


@property (nonatomic, retain)NSString *userID;
@property (nonatomic, retain)NSString *firstName;
@property (nonatomic, retain)NSString *lastName;

-(id)initWithDictionary:(NSDictionary *)sourceDictionary;


@end

在User.m #import "用户.h"

@implementation User
@synthesize userID,firstName,lastName;


-(id)initWithDictionary:(NSDictionary *)sourceDictionary

    self = [super init];
    if (self != nil)
    
        self.firstName=[sourceDictionary valueForKey:@"firstName"];
        self.lastName=[sourceDictionary valueForKey:@"lastName"];
        self.userID=[sourceDictionary valueForKey:@"userID"];
    
    return self;


@end

在您的numberOfRowsInSection方法中return usersArray.count;

在您的 cellForRowAtIndexPath 方法中

User *user=(User *)[usersArray objectAtIndex:indexPath.row];
yourLabel.text=user.firstName;