如何在 UITableView 上显示 JSON 数组

Posted 2023-03-04

【中文标题】如何在 UITableView 上显示 JSON 数组

【英文标题】：How to display JSON array on UITableView

【发布时间】：2012-06-07 06:48:30

【问题描述】：

JSON 数据是这样的......

"order_list_1":[
"name":"@SEVEN (7) OCLOCK BLADE PLATINUM","qty":1,"mrp":0.0,
"name":"ACT 2 POPCORN BUTTER PEPPER","qty":2,"mrp":0.0,
"name":"ACT 2 POPCORN CHILLY SURPRISE","qty":3,"mrp":0.0,
"name":"@MAGGI SOUP HOT N SOUR(1 1)","qty":4,"mrp":0.0,
"name":"ACT 2 POPCORN GOLDEN SIZZLE","qty":5,"mrp":0.0,
"name":"AMCHUR AAKHA 1kg","qty":6,"mrp":0.0]

json 数据显示在控制台而不是 tableview..

这是我的代码 sn-p...

-(void)fetchData

dispatch_async(bKQueue, ^
    NSData *data = [NSData dataWithContentsOfURL:latestURL];


    NSLog(@"LatestURL:%@",latestURL);       
    NSError* error=nil;  

    //Creating JSON Object
    NSDictionary *jsonDict= [NSJSONSerialization JSONObjectWithData:data                                                      options:kNilOptions error:&error];



    NSLog(@"JSON = %@", [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding]);

    //NSLog(@"dataaaa :%@",jsonDict);

    //[self performSelectorOnMainThread:@selector(fetchData:) withObject:data waitUntilDone:YES];



    dispatch_async(dispatch_get_main_queue(), ^

     //[self fetchData:responseData];
     [self.tableView reloadData];
     //NSLog(@"Value :%@",data);
     );




    NSDictionary *statuses=[jsonDict objectForKey:@"order_list_1"];


    NSLog(@"SomeStatus :%@",statuses);

    if (!statuses)
     
        NSLog(@"Error in Json :%@",error);
     
    else
    


        for(NSDictionary *newValu in statuses)
    

            NSString *name=[newValu objectForKey:@"name"];

            NSString *qty=[newValu objectForKey:@"qty"];

            NSString *mrp=[newValu objectForKey:@"mrp"];

            NSLog(@"Name :%@    Quantity :%@    MRP :%@ ",name,qty,mrp);
        
    


);

这是我的 Tableview 代码..

(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath 静态 NSString *CellIdentifier = @"Cell";

UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) 



 cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
 



NSError *error=nil;         
NSDictionary *jsonDict=[NSJSONSerialization JSONObjectWithData:responseData      options:kNilOptions error:&error];         
NSArray *statuses=[jsonDict objectForKey:@"order_list_1"];              
for (int i=0; i<jsonDict.count; i++)         
    NSDictionary *newDict=[statuses objectAtIndex:i];                 
NSLog(@"name :%@",[newDict valueForKey:@"name"]);    

NSDictionary *text=[statuses objectAtIndex:indexPath.row];    
cell.textLabel.text=[text objectForKey:@"name"];    



[self.tableView reloadData];
return cell;

【问题讨论】：

NSLog(@"name :%@",[newDict valueForKey:@"name"]);这是什么输出？它打印在控制台上吗？

1.正确格式化您的代码。 2.responseData是什么？ 3. 为什么要在cellForRowAtIndexPath 中创建字典对象，为什么里面有for-loop？ 4、为什么要从cellForRowAtIndexPath重新加载tableView

【参考方案1】：

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
    
        UITableViewCell *cell = [[UITableViewCell alloc]init];

        NSArray *geomery = [res objectForKey:@"results"];
        NSDictionary *item = [geomery objectAtIndex:indexPath.row];
        NSString *name = [item objectForKey:@"name"];
        //NSLog(name);
        //cell.textLabel.text =@"test" ;
        cell.textLabel.text= name;



        return cell;
    

这对我有用，检查字典索引是否正确发送

【参考方案2】：

-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath


    static NSString *CellIdentifier = @"Cell";

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];

    if (cell == nil)
    
        cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier] autorelease];
    
    dictJson = [self.aryJson objectAtIndex:indexPath.row];
    cell.textLabel.text = [dictJson objectForKey:@"title"];
    cell.textLabel.text = [dictJson objectForKey:@""];

    return cell;

【参考方案3】：

试试这个。

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
        static NSString *CellIdentifier = @"Cell";

        UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
        if (cell == nil) 

         cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
         

        NSError *error=nil;         
        NSDictionary *jsonDict=[NSJSONSerialization JSONObjectWithData:responseData      options:kNilOptions error:&error];         
        NSArray *statuses=[jsonDict objectForKey:@"order_list_1"];              
        NSDictionary *text=[statuses objectAtIndex:indexPath.row];    
        cell.textLabel.text=[text objectForKey:@"name"];    
        return cell;