网络热恋之json解析

现在的app开发很少有用到XML解析的了，主流的则是JSON。

//
//  ViewController.m
//  CX－JSON解析（三方JSONKit-master）

#import "ViewController.h"
#import "JSONKit.h"
@interface ViewController ()


@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];

    NSString * urlString = @"http://localhost/city.json";
    
    NSURL * url = [NSURL URLWithString:urlString];
    
    NSURLRequest * request = [[NSURLRequest alloc]initWithURL:url cachePolicy:0 timeoutInterval:15];
    
    [NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse * _Nullable response, NSData * _Nullable data, NSError * _Nullable connectionError) {
       //重点是这行代码，理解就可以，这个三方很好用。
        NSDictionary * dict = [data objectFromJSONData];
        
        NSArray * array = [dict objectForKey:@"city"];
        
        for (NSDictionary * dictTwo in array) {
            
            NSLog(@"%@",dictTwo);
            
        }
        
        
    }];
    
}
/*
 一部分结果
 2016-03-18 19:53:11.441 CX－JSON解析（三方JSONKit-master）[6130:389488] {
 city =     (
 {
 "city_id" = 1;
 "city_name" = "U897fU57ceU533a";
 },
 {
 "city_id" = 2;
 "city_name" = "U671dU9633U533a";
 },
 {
 "city_id" = 3;
 "city_name" = "U6d77U6dc0U533a";
 },
 {
 "city_id" = 4;
 "city_name" = "U4e30U53f0U533a";
 },
 {
 "city_id" = 5;
 "city_name" = "U77f3U666fU5c71U533a";
 },
 {
 "city_id" = 6;
 "city_name" = "U901aU5ddeU533a";
 },
 {
 "city_id" = 7;
 "city_name" = "U987aU4e49U533a";
 },
 {
 "city_id" = 8;
 "city_name" = "U623fU5c71U533a";
 },
 {
 "city_id" = 9;
 "city_name" = "U5927U5174U533a";
 },
 {
 "city_id" = 10;
 "city_name" = "U660cU5e73U533a";
 },
 {
 "city_id" = 11;
 "city_name" = "U6000U67d4U533a";
 },
 {
 "city_id" = 12;
 "city_name" = "U5e73U8c37U533a";
 },
 {
 "city_id" = 13;
 "city_name" = "U95e8U5934U6c9fU533a";
 },
 {
 "city_id" = 14;
 "city_name" = "U5bc6U4e91U53bf";
 },
 
   */

@end