在UITableView中加载本地json信息

Question

我有自己的json文件"list.json",用于下面的示例信息列表.我的json文件位于Xcode内部,我想向表中显示我的信息,请给我一些提示并帮助实现,如何解析本地json并在表中加载信息.

[
{
    "number": "1",
    "name": "jon"
},
{
    "number": "2",
    "name": "Anton"
},
{
    "number": "9",
    "name": "Lili"
},
{
    "number": "7",
    "name": "Kyle"
},
{
    "display_number": "8",
    "name": "Linda"
}
]

Answer 1

您可以创建一个继承自UITableViewController的自定义类.

将list.json文件的内容读入数组的代码是:

NSString * filePath =[[NSBundle mainBundle] pathForResource:@"list" ofType:@"json"];

    NSError * error;
    NSString* fileContents =[NSString stringWithContentsOfFile:filePath encoding:NSUTF8StringEncoding error:&error];


    if(error)
    {
        NSLog(@"Error reading file: %@",error.localizedDescription);
    }


    self.dataList = (NSArray *)[NSJSONSerialization
                                JSONObjectWithData:[fileContents dataUsingEncoding:NSUTF8StringEncoding]
                                options:0 error:NULL];

头文件是:

#import <UIKit/UIKit.h>

@interface TVNA_ReadingDataTVCViewController : UITableViewController

@end

实施是:

#import "TVNA_ReadingDataTVCViewController.h"

@interface TVNA_ReadingDataTVCViewController ()

@property  NSArray* dataList;

@end

@implementation TVNA_ReadingDataTVCViewController



- (void)viewDidLoad
{
    [super viewDidLoad];

    [self readDataFromFile];

    [self.tableView reloadData];
}


-(void)readDataFromFile
{
    NSString * filePath =[[NSBundle mainBundle] pathForResource:@"list" ofType:@"json"];

    NSError * error;
    NSString* fileContents =[NSString stringWithContentsOfFile:filePath encoding:NSUTF8StringEncoding error:&error];


    if(error)
    {
        NSLog(@"Error reading file: %@",error.localizedDescription);
    }


    self.dataList = (NSArray *)[NSJSONSerialization
                                JSONObjectWithData:[fileContents dataUsingEncoding:NSUTF8StringEncoding]
                                options:0 error:NULL];
}



#pragma mark - Table view data source

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{

    return 1;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{

    return self.dataList.count;
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *CellIdentifier = @"Cell";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];

    id keyValuePair =self.dataList[indexPath.row];

    cell.textLabel.text = keyValuePair[@"name"];

    cell.detailTextLabel.text=[NSString stringWithFormat:@"ID: %@", keyValuePair[@"number"]];
    return cell;
}


@end

最后,在您的故事板上,将此类指定为Table View Controller的自定义类.希望这可以帮助.