Question

我尝试像本教程那样存储JSON

http://www.touch-code-magazine.com/how-to-fetch-and-parse-json-by-using-data-models/

在教程中，它在LoanModel.h中声明了LocationModel。

@property (strong, nonatomic) LocationModel* location;

在projectDemo中哪个很棒，但是当我尝试在我的项目中使用它时

@property(strong,nonatomic) ContentDetailModel *content;

它将返回null。

删除该行后，它将起作用。

那么你可以查看我的代码，看看哪里出错了？

这是我尝试获取的JSON数据

{

"status": "success",

"content": [
    {
        "id": 11447,
        "title": "Arsenal's Afobe targets a full season on loan",
        "dateTime": "30.10.2014 06:38",
        "tags": [],
        "content": [
            {
                "type": "text",
                "subject": "Benik Afobe",
                "description": "The 21-year-old was last capped by the Three Lions in February 2013 when he featured for the Under-21s against Sweden at Walsall in a 4-0 win.\r\n\r\nA series of injuries since then have restricted his progress both on the club and international front and he spent the second half of last season on loan at Sheffield Wednesday."
            }
        ],
        "ingress": "Arsenal and England Under-21s striker Afobe is hoping a full season on loan can help to rejuvenate his career.\r\n",
        "image": "http://87.251.89.41/sites/default/files/afobe-celeb-dier.jpg",
        "created": 1407476424,
        "changed": 1414664497
    }
  ]
}

这是我在ContentListModel.h中的模型

@protocol ContentListModel

@end

@interface ContentListModel : JSONModel

@property (assign,nonatomic) NSString * id;
@property (strong,nonatomic) NSString * title;
@property (strong,nonatomic) NSString * dateTime;
@property (strong,nonatomic) NSArray  * tags;
@property (strong,nonatomic) NSString * ingress;
@property (strong,nonatomic) NSString * image;
@property (strong,nonatomic) NSString * created;
@property (strong,nonatomic) NSString *changed;

@property(strong,nonatomic) ContentDetailModel *content;

@end

这是我在ContentDetailModel.h中的模型

@interface ContentDetailModel : JSONModel

@property(strong,nonatomic) NSString * type;
@property(strong,nonatomic) NSString * subject;
@property(strong,nonatomic)NSString * description;

@end

这是FOTTFeed.h

#import <Foundation/Foundation.h>
#import "JSONModel.h"
#import "ContentListModel.h"

@interface FOTTFeed : JSONModel

@property (strong , nonatomic) NSArray<ContentListModel> *content;

@end

这是我的代码

#import "FeedList.h"
#import "SWRevealViewController.h"
#import "UIImageView+WebCache.h"
#import "JSONModelLib.h"
#import "FOTTFeed.h"
#import "HUD.h"
#import "FeedDetail.h"

@interface FeedList (){
    FOTTFeed *feed;
}

@end

@implementation FeedList{
    NSArray *tableData;

}
@synthesize tableView;
@synthesize detailView;

- (void)viewDidLoad {
    [super viewDidLoad];



    _menu.target = self.revealViewController;
    _menu.action = @selector(revealToggle:);
    [self.view addGestureRecognizer:self.revealViewController.panGestureRecognizer];

    //background image
    UIImage * background = [UIImage imageNamed:@"background_2.jpg"];
    UIImageView * imageView = [[UIImageView alloc]initWithImage:background];
    [self.tableView setBackgroundView:imageView];




    //set navigation bar colour
    [self.navigationController.navigationBar setBarTintColor:[UIColor colorWithRed:(29/255.0) green:(43/255.0) blue:(58/255.0) alpha:1.0]];

}


-(void)viewDidAppear:(BOOL)animated{

    [HUD showUIBlockingIndicatorWithText:@"Loading..."];

    //fetch the feed
    feed = [[FOTTFeed alloc]initFromURLWithString:@"http://87.251.89.41/application/11424/article/get_articles_list" completion:^(JSONModel * model, JSONModelError *err){



        //hide the loader view
        [HUD hideUIBlockingIndicator];

        //json fetch
       NSLog(@"Content:%@",feed.content);

        [self.tableView reloadData];

    }];

}

-(void)viewWillAppear:(BOOL)animated{



    [super viewWillAppear:animated];
    [self.tableView reloadData];
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}
- (NSInteger) tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
    return [feed.content count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
    static NSString *CellIdentifier = @"Cell";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];

    // Configure the cell...
    if (cell == nil) {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
    }
    cell.tag = indexPath.row;
    [cell setOpaque:NO];
    [cell setBackgroundColor: [UIColor clearColor]];


    ContentListModel *data = [feed.content objectAtIndex:indexPath.row];

    UIImageView *thumbnailImageView = (UIImageView *)[cell viewWithTag:100];
    UILabel *titleNews = (UILabel *)[cell viewWithTag:200];
    UILabel *Time = (UILabel *)[cell viewWithTag:300];
    UITextView * ingress = (UITextView *)[cell viewWithTag:400];

    ingress.editable = false;

    titleNews.text = data.title;


    ingress.text = data.ingress;


    Time.text = data.dateTime;



    [thumbnailImageView sd_setImageWithURL:[NSURL URLWithString:[NSString stringWithFormat:@"%@", data.image]] placeholderImage:[UIImage imageNamed:@"dot.png"]];


    return cell;

}

-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender{
    if([segue.identifier isEqualToString:@"showFeedDetail"]){
        NSIndexPath *indexpath = [self.tableView indexPathForSelectedRow];
        FeedDetail *detailView = segue.destinationViewController;
        detailView.data = [feed.content objectAtIndex:indexpath.row];


    }
}

@end

Answer 1

JSON Detail是一个数组：

"content": [
        {
            "type": "text",
            "subject": "Benik Afobe",
            "description": "The 21-year-old was last capped by the Three Lions in February 2013 when he featured for the Under-21s against Sweden at Walsall in a 4-0 win.\r\n\r\nA series of injuries since then have restricted his progress both on the club and international front and he spent the second half of last season on loan at Sheffield Wednesday."
        }
    ]

在您的模型ContentListModel中，＆＃34;内容＆＃34;我认为，财产应该是NSArray。

Answer 2

BWJSONMatcher是一个轻量级库，可帮助您轻松地将JSON字符串或JSON对象与数据模型匹配。如果数据模型的所有属性与json数据中的键一致， BWJSONMatcher 将自动匹配它们。

您可以找到详细的示例here。

JSONModel - 无法像本教程那样将获取的JSON分配给模型

2 个答案: