IOS-网络（小文件下载）

 //
 //  ViewController.m
 //  IOS_0131_小文件下载
 //
 //  Created by ma c on 16/1/31.
 //  Copyright © 2016年 博文科技. All rights reserved.
 //

 #import "ViewController.h"

 @interface ViewController ()

 @end

 @implementation ViewController
 /*
  下载小文件的方式
  1.NSData dataWithContentOfURL
  2.NSURLConnection
  */

 - (void)viewDidLoad {
     [super viewDidLoad];

 }

 - (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
 {
     [self downloadFile1];
     [self downloadFile2];
 }

 ///1.NSData dataWithContentOfURL
 - (void)downloadFile1
 {
     dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, ), ^{

         NSURL *url = [NSURL URLWithString:@"http://localhost:8080/MJServer/resources/images/minion_01.png"];
         NSData *data = [NSData dataWithContentsOfURL:url];
         NSLog(@"downloadFile1---%ld",data.length);
     });
 }
 ///2.NSURLConnection
 - (void)downloadFile2
 {
     NSURL *url = [NSURL URLWithString:@"http://localhost:8080/MJServer/resources/images/minion_01.png"];

     NSURLRequest *request = [NSURLRequest requestWithURL:url];

     [NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse * _Nullable response, NSData * _Nullable data, NSError * _Nullable connectionError) {
         NSLog(@"downloadFile2---%ld",data.length);

     }];
 }

 @end