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多线程与网络之NSURLConnection发送请求

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08/03
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*:first-child {
margin-top: 0 !important; }
body > *:last-child {
margin-bottom: 0 !important; }

a {
color: #4183C4; }
a.absent {
color: #cc0000; }
a.anchor {
display: block;
padding-left: 30px;
margin-left: -30px;
cursor: pointer;
position: absolute;
top: 0;
left: 0;
bottom: 0; }

h1, h2, h3, h4, h5, h6 {
margin: 20px 0 10px;
padding: 0;
font-weight: bold;
-webkit-font-smoothing: antialiased;
cursor: text;
position: relative; }

h1:hover a.anchor, h2:hover a.anchor, h3:hover a.anchor, h4:hover a.anchor, h5:hover a.anchor, h6:hover a.anchor {
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text-decoration: none; }

h1 tt, h1 code {
font-size: inherit; }

h2 tt, h2 code {
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h3 tt, h3 code {
font-size: inherit; }

h4 tt, h4 code {
font-size: inherit; }

h5 tt, h5 code {
font-size: inherit; }

h6 tt, h6 code {
font-size: inherit; }

h1 {
font-size: 28px;
color: black; }

h2 {
font-size: 24px;
border-bottom: 1px solid #cccccc;
color: black; }

h3 {
font-size: 18px; }

h4 {
font-size: 16px; }

h5 {
font-size: 14px; }

h6 {
color: #777777;
font-size: 14px; }

p, blockquote, ul, ol, dl, li, table, pre {
margin: 15px 0; }

hr {
background: transparent url(data:image/png;base64,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) repeat-x 0 0;
border: 0 none;
color: #cccccc;
height: 4px;
padding: 0;
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body > h2:first-child {
margin-top: 0;
padding-top: 0; }
body > h1:first-child {
margin-top: 0;
padding-top: 0; }
body > h1:first-child + h2 {
margin-top: 0;
padding-top: 0; }
body > h3:first-child, body > h4:first-child, body > h5:first-child, body > h6:first-child {
margin-top: 0;
padding-top: 0; }

a:first-child h1, a:first-child h2, a:first-child h3, a:first-child h4, a:first-child h5, a:first-child h6 {
margin-top: 0;
padding-top: 0; }

h1 p, h2 p, h3 p, h4 p, h5 p, h6 p {
margin-top: 0; }

li p.first {
display: inline-block; }
li {
margin: 0; }
ul, ol {
padding-left: 30px; }

ul :first-child, ol :first-child {
margin-top: 0; }

dl {
padding: 0; }
dl dt {
font-size: 14px;
font-weight: bold;
font-style: italic;
padding: 0;
margin: 15px 0 5px; }
dl dt:first-child {
padding: 0; }
dl dt > :first-child {
margin-top: 0; }
dl dt > :last-child {
margin-bottom: 0; }
dl dd {
margin: 0 0 15px;
padding: 0 15px; }
dl dd > :first-child {
margin-top: 0; }
dl dd > :last-child {
margin-bottom: 0; }

blockquote {
border-left: 4px solid #dddddd;
padding: 0 15px;
color: #777777; }
blockquote > :first-child {
margin-top: 0; }
blockquote > :last-child {
margin-bottom: 0; }

table {
padding: 0;border-collapse: collapse; }
table tr {
border-top: 1px solid #cccccc;
background-color: white;
margin: 0;
padding: 0; }
table tr:nth-child(2n) {
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table tr th {
font-weight: bold;
border: 1px solid #cccccc;
margin: 0;
padding: 6px 13px; }
table tr td {
border: 1px solid #cccccc;
margin: 0;
padding: 6px 13px; }
table tr th :first-child, table tr td :first-child {
margin-top: 0; }
table tr th :last-child, table tr td :last-child {
margin-bottom: 0; }

img {
max-width: 100%; }

span.frame {
display: block;
overflow: hidden; }
span.frame > span {
border: 1px solid #dddddd;
display: block;
float: left;
overflow: hidden;
margin: 13px 0 0;
padding: 7px;
width: auto; }
span.frame span img {
display: block;
float: left; }
span.frame span span {
clear: both;
color: #333333;
display: block;
padding: 5px 0 0; }
span.align-center {
display: block;
overflow: hidden;
clear: both; }
span.align-center > span {
display: block;
overflow: hidden;
margin: 13px auto 0;
text-align: center; }
span.align-center span img {
margin: 0 auto;
text-align: center; }
span.align-right {
display: block;
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clear: both; }
span.align-right > span {
display: block;
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margin: 13px 0 0;
text-align: right; }
span.align-right span img {
margin: 0;
text-align: right; }
span.float-left {
display: block;
margin-right: 13px;
overflow: hidden;
float: left; }
span.float-left span {
margin: 13px 0 0; }
span.float-right {
display: block;
margin-left: 13px;
overflow: hidden;
float: right; }
span.float-right > span {
display: block;
overflow: hidden;
margin: 13px auto 0;
text-align: right; }

code, tt {
margin: 0 2px;
padding: 0 5px;
white-space: nowrap;
border: 1px solid #eaeaea;
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border-radius: 3px; }

pre code {
margin: 0;
padding: 0;
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border: none;
background: transparent; }

.highlight pre {
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border: 1px solid #cccccc;
font-size: 13px;
line-height: 19px;
overflow: auto;
padding: 6px 10px;
border-radius: 3px; }

pre {
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border: 1px solid #cccccc;
font-size: 13px;
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pre code, pre tt {
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sup {
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vertical-align: super;
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* {
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@media screen and (min-width: 914px) {
body {
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margin:0 auto;
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}
@media print {
table, pre {
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pre {
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}
-->

HTTP

  • 1.简介
    • 1.URL:统一资源分配符
    • 2.协议名://主机地址/路径
    • 3.HTTP: 超文本传输协议

NSURLConnection

  • 1.基本简介:

    • 1.1 NSURLRequest: 一个这对象代表一个请求,里面有:
      • 一个NSURL对象
      • 请求方法,请求头,请求体
      • 请求超时...
    • 1.2 NSMutableURLRequest: NSURLRequest的子类

  • 2.使用步骤:

    • 2.1 创建一个NSURL对象,设置请求路径(协议名://主机地址/路径 + ? + 参数1 & 参数2)
    • 2.2 传入NSURL创建一个NSURLRequest对象,设置请求头和请求体(默认就有)
    • 2.3 使用NSURLConnection发送请求(得到服务器返回的数据)
    • 2.5 解析服务器响应的数据(将NSData转成NSString)

  • 3.发送GET请求

    // 第一种:同步
    // 1.创建一个NSURL对象,设置请求路径
    NSURL *url = [NSURL URLWithString:@"http://120.25.226.186:32812/login?username=xiao&pwd=xiao&type=JSON"];// 2.传入NSURL创建一个NSURLRequest对象,设置请求头和请求体(默认存在)
    NSURLRequest *request = [NSURLRequest requestWithURL:url];// 3.使用NSURLConnection发送请求,得到服务器返回的NSData数据
    NSURLResponse *response = nil; // 真实类型是NSHTTPURLResponse
    NSError *error = nil;
    /*
    第一个参数:请求对象
    第二个参数:响应头信息,传地址
    第三个参数:错误信息, 传地址
    */
    [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];// 第二种:异步
    // 1.创建一个NSURL对象.设置请求路径
    NSURL *url = [NSURL URLWithString:@"http://120.25.226.186:32812/login?username=520it&pwd=520it&type=JSON"];
    // 2.创建一个NSURLRequest对象,设置请求头和请求体(默认存在)
    NSURLRequest *request = [NSURLRequest requestWithURL:url];
    // 3.使用NSURLConnection发送网络请求
    [NSURLConnection sendAsynchronousRequest:request queue:[[NSOperationQueue alloc] init]
    completionHandler:^(NSURLResponse * _Nullable response, NSData * _Nullable data, NSError * _Nullable connectionError) { NSLog(@"%@", [NSThread currentThread]);
    // 4.解析服务器响应的数据
    NSString *str = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
    NSLog(@"%@", str);
    }];// 第三种:(异步代理)注意data一定要拼接
    - (void)sendAsyncDelegate
    {
    // 1.创建一个NSURL对象,设置请求路径
    NSURL *url = [NSURL URLWithString:@"http://120.25.226.186:32812/login?username=520it&pwd=520it&type=JSON"];
    // 2.创建一个NSURLRequest对象,设置请求头和请求体(默认存在)
    NSURLRequest *request = [NSURLRequest requestWithURL:url];// 3.使用NSURLConnection来发送请求(返回服务器响应的数据)
    // [NSURLConnection connectionWithRequest:request delegate:self]; // 第一种
    // [[NSURLConnection alloc] initWithRequest:request delegate:self]; // 第二种NSURLConnection *connect = [[NSURLConnection alloc] initWithRequest:request delegate:self startImmediately:NO]; // 第三种
    // 如果 startImmediately 设置成NO时,必须调用start方法调用
    [connect start];
    }
    // 实现代理方法
    // 1.当接受到服务器响应的时候调用
    - (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
    {
    self.dataM = [NSMutableData data];
    }
    // 2.当接收到服务器返回的二进制数据的时候调用, 会调用多次
    - (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
    {
    [self.dataM appendData:data];
    }
    // 3.当请求失败或者错误的时候调用(请求超时)
    - (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
    {}
    // 4.当请求结束的事后调用
    - (void)connectionDidFinishLoading:(NSURLConnection *)connection
    {
    // 解析数据
    NSString *str = [[NSString alloc] initWithData:self.dataM encoding:NSUTF8StringEncoding];
    NSLog(@"%@", str);
    }

  • 4.发送POST请求

    // 1.创建NSURL
    NSURL *url = [NSURL URLWithString:@"http://120.25.226.186:32812/login"];// 2.创建NSMutableURLRequest
    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
    // 2.1 设置NSMutableURLRequest的属性
    request.HTTPMethod = @"POST";
    request.HTTPBody = [@"username=520it&pwd=520it&type=JSON" dataUsingEncoding:NSUTF8StringEncoding];request.timeoutInterval = 10.0; //过期时间[request setValue:@"ios10" forHTTPHeaderField:@"User-Agent"];// 3.发送请求
    [NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue]
    completionHandler:^(NSURLResponse * _Nullable response, NSData * _Nullable data, NSError * _Nullable connectionError) { // 解析数据
    NSLog(@"%@", [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding]);
    }];