iOS - OC - 网络请求 - 中文转码

 #import "ViewController.h"

 @interface ViewController ()

 @end

 @implementation ViewController

 #pragma mark ----------------------
 #pragma mark Events
 -(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
 {
     [self post];
 }

 #pragma mark ----------------------
 #pragma mark Methods
 -(void)get
 {

     NSString *urlStr = @"http://120.25.226.186:32812/login2?username=小码哥&pwd=520it&type=JSON";

     NSLog(@"转码前: %@",urlStr);

     //中文转码处理：请求接口有中文
     urlStr =  [urlStr stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];

     NSLog(@"转码后: %@",urlStr);

     //1.url
     NSURL *url = [NSURL URLWithString:urlStr];

     //http://120.25.226.186:32812/login2?username=%E5%B0%8F%E7%A0%81%E5%93%A5&pwd=520it&type=JSON

     NSLog(@"url------%@",url);

     //2.urlrequest
     NSURLRequest *request = [NSURLRequest requestWithURL:url];

     //3.connect
     [NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse * _Nullable response, NSData * _Nullable data, NSError * _Nullable connectionError) {

         //容错处理
         if (connectionError) {
             NSLog(@"%@",connectionError);
             return ;
         }
         //4.解析
         NSLog(@"%@",[[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding]);
     }];

 }

 -(void)post
 {
     //观察URL中是否有中文,如果有中文则需要转码
     NSString *urlStr = @"http://120.25.226.186:32812/login2";

     //username=小码哥&pwd=520it&type=JSON
     //1.url
     NSURL *url = [NSURL URLWithString:urlStr];

     //2.urlrequest
     NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];

     //2.1 post
     request.HTTPMethod = @"POST";

     //2.2 body
     request.HTTPBody = [@"username=小码哥&pwd=520it&type=JSON" dataUsingEncoding:NSUTF8StringEncoding];

     //3.connect
     [NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse * _Nullable response, NSData * _Nullable data, NSError * _Nullable connectionError) {

         //容错处理
         if (connectionError) {
             NSLog(@"%@",connectionError);
             return ;
         }
         //4.解析
         NSLog(@"%@",[[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding]);
     }];

 }
 @end