我试图找出如何从另一个数组中的JSON数组中获取数据。
这是JSON。我想从照片中获取一张图片网址。
[
{
"id":6901439,
"name":"INDTTIN CD",
"description":"Full-length released June 2013 via Little Heart Records. \r\n\r\nTrack Listing:\r\n\r\n1. Tired\r\n2. Time to Heal\r\n3. Gypsy Summer\r\n4. Sketchbooks\r\n5. I Never Deserve the Things I Need\r\n6. Say it With the \"I\"\r\n7. A Negative Mind\r\n8. Rafters\r\n9. Indrid Cold\r\n10. Present Tense ",
"short_url":"http://onmyhonor.storenvy.com/products/6901439-indttin-cd",
"status":"active",
"labels":null,
"preorder":false,
"on_sale":true,
"store_id":373949,
"price":"7.00",
"marketplace_category":"music-cds",
"marketplace_category_id":345,
"photos":[
{
"photo":{
"original":"//d111vui60acwyt.cloudfront.net/product_photos/15878486/inddthin_20vinyl_20image_201_original.jpg",
"large":"//d111vui60acwyt.cloudfront.net/product_photos/15878486/inddthin_20vinyl_20image_201_large.jpg",
"homepage":"//d111vui60acwyt.cloudfront.net/product_photos/15878486/inddthin_20vinyl_20image_201_homepage.jpg",
"medium":"//d111vui60acwyt.cloudfront.net/product_photos/15878486/inddthin_20vinyl_20image_201_medium.jpg",
"small":"//d111vui60acwyt.cloudfront.net/product_photos/15878486/inddthin_20vinyl_20image_201_small.jpg",
"64w":"//d111vui60acwyt.cloudfront.net/product_photos/15878486/inddthin_20vinyl_20image_201_64w.jpg",
"200w":"//d111vui60acwyt.cloudfront.net/product_photos/15878486/inddthin_20vinyl_20image_201_200w.jpg",
"400w":"//d111vui60acwyt.cloudfront.net/product_photos/15878486/inddthin_20vinyl_20image_201_400w.jpg",
"600w":"//d111vui60acwyt.cloudfront.net/product_photos/15878486/inddthin_20vinyl_20image_201_600w.jpg",
"1000w":"//d111vui60acwyt.cloudfront.net/product_photos/15878486/inddthin_20vinyl_20image_201_1000w.jpg",
"64sq":"//d111vui60acwyt.cloudfront.net/product_photos/15878486/inddthin_20vinyl_20image_201_64sq.jpg",
"200sq":"//d111vui60acwyt.cloudfront.net/product_photos/15878486/inddthin_20vinyl_20image_201_200sq.jpg",
"400sq":"//d111vui60acwyt.cloudfront.net/product_photos/15878486/inddthin_20vinyl_20image_201_400sq.jpg"
}
}
],
"variants":[
{
"variant":{
"id":14382188,
"name":"INDTTIN CD",
"position":1,
"sku":"",
"full_quantity":300,
"in_stock":300,
"percent_available":100,
"is_default_variant?":false,
"price":7.0,
"sold_out":false,
"status":"active"
}
}
],
"collections":[
],
"store":{
"id":373949,
"name":"On My Honor",
"marketplace_url":"http://www.storenvy.com/stores/373949-on-my-honor"
}
}
]
这是我的代码：
#define kBgQueue dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0)
#define storeURL [NSURL URLWithString: @"http://onmyhonor.storenvy.com/products.json"]
#import "GRSStoreViewController.h"
#import "GRSStoreDetailViewController.h"
@interface GRSStoreViewController ()
@end
@implementation GRSStoreViewController
@synthesize name, description, short_url, price, productImage, nameArray, descriptionArray, urlArray, priceArray, imageArray, url;
- (id)initWithStyle:(UITableViewStyle)style
{
self = [super initWithStyle:style];
if (self) {
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
self.title = @"Store";
self.tableView = [[UITableView alloc]initWithFrame:CGRectZero style:UITableViewStyleGrouped];
url = [NSURL URLWithString:@"http://onmyhonor.storenvy.com/products.json"];
dispatch_async(kBgQueue, ^{
NSData *data = [NSData dataWithContentsOfURL:url];
[self performSelectorOnMainThread:@selector(fetchedData:) withObject:data waitUntilDone:YES];
});
}
- (void)fetchedData:(NSData *)responseData
{
NSError *error;
nameArray = [[NSMutableArray alloc]init];
descriptionArray = [[NSMutableArray alloc]init];
urlArray = [[NSMutableArray alloc]init];
priceArray = [[NSMutableArray alloc]init];
imageArray = [[NSMutableArray alloc]init];
NSArray *json = [NSJSONSerialization JSONObjectWithData:responseData options:kNilOptions error:&error];
for (NSDictionary *item in json)
{
name = [item objectForKey:@"name"];
description = [item objectForKey:@"description"];
short_url = [item objectForKey:@"short_url"];
price = [item objectForKey:@"price"];
[nameArray addObject:name];
[descriptionArray addObject:description];
[urlArray addObject:short_url];
[priceArray addObject:price];
}
[self.tableView reloadData];
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [nameArray count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"Cell"];
if (cell == nil)
{
cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:@"Cell"];
cell.textLabel.font = [UIFont systemFontOfSize:16.0];
}
if (cell)
{
cell.textLabel.text = [nameArray objectAtIndex:indexPath.row];
cell.textLabel.textColor = [UIColor darkGrayColor];
}
return cell;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
GRSStoreDetailViewController *itemDetail = [[GRSStoreDetailViewController alloc]initWithNibName:@"GRSStoreDetailViewController" bundle:nil];
itemDetail.priceString = [priceArray objectAtIndex:indexPath.row];
itemDetail.descriptionString = [descriptionArray objectAtIndex:indexPath.row];
itemDetail.itemURL = [urlArray objectAtIndex:indexPath.row];
[self.navigationController pushViewController:itemDetail animated:YES];
[tableView deselectRowAtIndexPath:indexPath animated:YES];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end
答案 0 :(得分：1)
将循环更改为
for (NSDictionary *item in json)
{
NSArray *photos = item[@"photos"];
NSDictionary *dict = [photos[0] valueForKeyPath:"photo"];
NSLog(@"original = %@", dict[@"original"]);
name = [item objectForKey:@"name"];
description = [item objectForKey:@"description"];
short_url = [item objectForKey:@"short_url"];
price = [item objectForKey:@"price"];
[nameArray addObject:name];
[descriptionArray addObject:description];
[urlArray addObject:short_url];
[priceArray addObject:price];
}
答案 1 :(得分：1)
更改此
NSArray *json = [NSJSONSerialization JSONObjectWithData:responseData options:kNilOptions error:&error];
for (NSDictionary *item in json)
{
name = [item objectForKey:@"name"];
description = [item objectForKey:@"description"];
short_url = [item objectForKey:@"short_url"];
price = [item objectForKey:@"price"];
[nameArray addObject:name];
[descriptionArray addObject:description];
[urlArray addObject:short_url];
[priceArray addObject:price];
}
[self.tableView reloadData];
到此
NSdictionary *json = [NSJSONSerialization JSONObjectWithData:responseData options:kNilOptions error:&error];
name = [json objectForKey:@"name"];
description = [json objectForKey:@"description"];
short_url = [json objectForKey:@"short_url"];
price = [json objectForKey:@"price"];
// this is your photos array
NSArray *photos = [josn objectForKey:@"photos"];
// every object in this array is a dictionary. In your case this array has only one dictionary so
NSDictionary *photosDict = [photos firstObject];
// from here you can access all keys of photosDict
photosDict中的所有可用键：