Parse Json for UITableView iOS

Question

这是我来自Web服务的Json响应，我无法解析它。例如，我想做的是在表视图中加载以下数据。3.7 作为节标题和行中的其他值。我该怎么做？？我想使用内置的API没有第三方框架。

任何帮助将不胜感激。

{"Links":{"3.7":[{"fld_app_download_id":"7111","fld_app_version_id":"1928","fld_date_added":"2012-10-04 08:40:38","fld_cracker":"vend3tta101","fld_download_link":"fiberupload.com","fld_url":"http://fiberupload.com/pwzmodjshwhr/1Password_Pro_(v3.7_v370009_Univ_os31)-vend3tta101.ipa","fld_status":"1"},{"fld_app_download_id":"7112","fld_app_version_id":"1928","fld_date_added":"2012-10-04 08:40:38","fld_cracker":"vend3tta101","fld_download_link":"depositfiles.com","fld_url":"http://depositfiles.com/files/eyhcw06b6","fld_status":"1"},{"fld_app_download_id":"7113","fld_app_version_id":"1928","fld_date_added":"2012-10-04 08:40:38","fld_cracker":"vend3tta101","fld_download_link":"turbobit.net","fld_url":"http://turbobit.net/vyc5jkr5s51k.html","fld_status":"1"}]}}

Answer 1

简单来说，看看下面的代码：

#import "YourViewController.h"
@interface NSDictionary(JSONCategories)
+(NSDictionary*)dictionaryWithContentsOfJSONURLString:(NSString*)urlAddress;
-(NSData*)toJSON;
@end
@implementation NSDictionary(JSONCategories)
+(NSDictionary*)dictionaryWithContentsOfJSONURLString:(NSString*)urlAddress{
NSData* data = [NSData dataWithContentsOfURL: [NSURL URLWithString: urlAddress] ];
__autoreleasing NSError* error = nil;
id result = [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:&error];
if (error != nil) return nil;
return result;
}
-(NSData*)toJSON{
NSError* error = nil;
id result = [NSJSONSerialization dataWithJSONObject:self options:kNilOptions error:&error];
if (error != nil) return nil;
return result;    
}
@end
@implementation YourViewController
-(IBAction)downloadData:(id)sender{
    NSString *yourResponseLink = @"YOUR RESPONSE LINK";
    NSURL *urlString = [NSURL URLWithString:urlWroteString];
    NSData* data = [NSData dataWithContentsOfURL:urlString];
    [self performSelectorOnMainThread:@selector(fetchedData:) withObject:data waitUntilDone:NO];
}
-(void)fetchedData:(NSData *)responseData {
    NSError* error;
    if (responseData == nil) {
        NSLog(@"NO DATA HAS BEEN FETCHED,ERROR = %@",error);
    }else{
        NSDictionary* json = [NSJSONSerialization JSONObjectWithData:responseData options:kNilOptions error:&error];
        NSArray *yourResponseArray = [json objectForKey:@"YOUR RESPONSE KEY"];
        NSLog("YOU RESPONSE IS = %@",yourResponseArray);
    }
}

@end

要显示来自响应的数据，请注意您的数据存储在 NSArray 上，因此在您的 cellForRowAtIndexPath 中，使用以下方法：

-(UITableViewCell *)tableView:(UITableView *)myTableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
    //initialize your cells normally and to display the data from your response use
    NSDictionary *yourSpecificData = [yourResponseArray objectAtIndex:[indexPath row]];
    //and finally display some text in the cell
    cell.textLabel.text = [yourSpecificData objectForKey:@"SOME KEY FROM RESPONSE"];
}

Answer 2

你看过NSJSONSerialization类吗？它处理 JSON 和属性列表之间的转换。

Answer 3

你可以在

ios5中使用"NSJsonSerialization";查看代码

-(void) parseJsonData:(NSData *)data
{
    NSError *error;
    NSDictionary *json = [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:&error];
    if (json == nil) {
        NSLog(@"json parse failed rn");
        return;
    }
    NSArray *songArray = [json objectForKey:@"song"];
    NSLog(@"song collection: %@rn",songArray);
    _song = songArray;
    self.songIndex = 0;
    NSDictionary *song = [songArray objectAtIndex:0];
    NSLog(@"song info: %@tn",song);

}