//
// ViewController.m
// get异步网络请求
//
// Created by YIem on 16/3/1.
// Copyright © 2016年 YIem. All rights reserved.
//

import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

• (void)viewDidLoad {

  [super viewDidLoad];
  // Do any additional setup after loading the view, typically from a nib.
  self.view.backgroundColor = [UIColor cyanColor];
  UIButton *getButton = [UIButton buttonWithType:UIButtonTypeSystem];
  getButton.frame = CGRectMake(100, 100, 100, 100);
  [getButton setTitle:@"get网络请求" forState:UIControlStateNormal];
  [getButton addTarget:self action:@selector(getAction) forControlEvents:UIControlEventTouchUpInside];
  [self.view addSubview:getButton];
  

  }

• (void)getAction
  {

  // 网络链接
  NSString *urlStr = @"http://api.map.baidu.com/place/v2/search?query=银行&region=大连&output=json&ak=6E823f587c95f0148c19993539b99295";
  // 当网址中有未明字符(如中文)时进行转码
  NSString *urlEncode = [urlStr stringByAddingPercentEncodingWithAllowedCharacters:[NSCharacterSet URLQueryAllowedCharacterSet]];
  
  NSURL *url = [NSURL URLWithString:urlEncode];
  // 请求
  NSURLRequest *request = [NSURLRequest requestWithURL:url];
  // 配置(默认配置)
  NSURLSession *session = [NSURLSession sessionWithConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration]];
  // 创建请求任务, 当异步请求完成时会调用block
  NSURLSessionDataTask *getTask = [session dataTaskWithRequest:request completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
      NSMutableDictionary *dic = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:nil];
      NSLog(@"--%@", dic);
      
  }];
  // 开始任务
  [getTask resume];

  }

• (void)didReceiveMemoryWarning {

  [super didReceiveMemoryWarning];
  // Dispose of any resources that can be recreated.

  }

@end