使用OC进行实现GET和POST请求

//
//  ViewController.m
//  OC-13_02
//
//  Created by Ibokan on 15/12/28.
//  Copyright © 2015年 ibokan. All rights reserved.
//

#import "ViewController.h"
#import "WeiboModel.h"

@interface ViewController ()<NSURLConnectionDataDelegate>
{
    NSMutableData *mData;
    NSURLConnection *connentGet;
    NSMutableData *mPostData;
    NSURLConnection *connetionPost;

}
@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
    
    
}

//同步post
- (IBAction)synPost:(id)sender {
    NSString *urlString = @"https://api.weibo.com/2/statuses/update.json";
    //编码
    urlString = [urlString stringByAddingPercentEncodingWithAllowedCharacters:[NSCharacterSet URLQueryAllowedCharacterSet]];
    //转成NSURL
    NSURL *url = [NSURL URLWithString:urlString];
    //在OC中使用NSMutableURLRequest进行post请求
    NSMutableURLRequest *mRequest = [NSMutableURLRequest requestWithURL:url cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:60];
    
    NSString*bodyString = @"status=你好&access_token=2.00IujYFE8Evp8C32ce30bc02uNGpHE";
    
    NSData *data = [bodyString dataUsingEncoding:4];
    //设置方法体
    [mRequest setHTTPMethod:@"post"];
    [mRequest setHTTPBody:data];
    
    NSData *resultData = [NSURLConnection sendSynchronousRequest:mRequest returningResponse:nil error:nil];
    NSDictionary *dictionary = [NSJSONSerialization JSONObjectWithData:resultData options:NSJSONReadingAllowFragments error:nil];
    NSLog(@"dictionary = %@",dictionary);
    
}
//异步post
- (IBAction)asynPost:(id)sender {
    
    NSString*urlString = @"https://api.weibo.com/2/statuses/update.json";
    urlString = [urlString stringByAddingPercentEncodingWithAllowedCharacters:[NSCharacterSet URLQueryAllowedCharacterSet]];
    NSURL *url = [NSURL URLWithString:urlString];
    
    //在OC中使用NSMutableURLRequest发送post请求
    NSMutableURLRequest *mAsynRequest = [NSMutableURLRequest requestWithURL:url cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:60];
    
    NSString *bodyString = @"status=恭喜恭喜&access_token=2.00IujYFE8Evp8C32ce30bc02uNGpHE";
    NSData *data = [bodyString dataUsingEncoding:4];
    
    //设置方法体
    [mAsynRequest setHTTPMethod:@"post"];
    [mAsynRequest setHTTPBody:data];
    
    //连接
    connetionPost = [NSURLConnection connectionWithRequest:mAsynRequest delegate:self];
    
    
    
    
}

//同步
- (IBAction)synchronousGet:(id)sender {
    
    //拿到urlString
    NSString *urlString = @"https://api.weibo.com/2/statuses/home_timeline.json?access_token=2.00IujYFE8Evp8C32ce30bc02uNGpHE";
    
    //编码
    urlString = [urlString stringByAddingPercentEncodingWithAllowedCharacters:[NSCharacterSet URLQueryAllowedCharacterSet]];
    
    //转换成NSURL
    NSURL *url = [NSURL URLWithString:urlString];
    
    /*创建并返回一个URL请求，指向一个指定的URL，采用对应的缓存策略 和 超时相应时长（默认时长60秒）
     NSURLRequestCachePolicy 缓存策略
     ：【
       NSURLRequestUseProtocolCachePolicy：默认的缓存策略，如果缓存不存在，直接从服务端获取，如果缓存存在，会根据response中的Cache-Control字段判断下一步操作，如：Cache-Control字段为must-revalidata,则询问服务端该数据时否有更新，无更新的话直接返回给用户缓存数据，若已更新，则请求服务端。
     
       NSURLRequestReloadIgnoringLocalCacheData：忽略本地缓存数据，直接请求服务端
     
       NSURLRequestReloadIgnoringLocalAndRemoteCacheData：忽略本地缓存，代理服务器以及其他中介，直接请求源服务器
     
       NSURLRequestReloadIgnoringCacheData：= NSURLRequestReloadIgnoringLocalCacheData
     
       NSURLRequestReturnCacheDataElseLoad：有缓存就用它，不管其有效性（忽略Cache-Control字段），无则请求服务器
     
       NSURLRequestReturnCacheDataDontLoad：死活加载本地缓存，没有就失败（确定当前无网络时使用）
     
       NSURLRequestReloadRevalidatingCacheData：缓存数据必须得到服务端确认有效才使用
      】
     */
    NSURLRequest *request = [NSURLRequest requestWithURL:url cachePolicy:NSURLRequestReloadIgnoringCacheData timeoutInterval:10];
    //服务器返回的网络请求的一些参数
    NSURLResponse *httpUrlResponse;
    
    NSError *error ;
    
    //在OC中使用NSURLConnection类，和服务器连接，这里是同步连接
    NSData *data = [NSURLConnection sendSynchronousRequest:request returningResponse:&httpUrlResponse error:&error];
    
    //Json数据格式解析，利用系统提供的API进行Jison数据解析
    /*
     <#(NSJSONReadingOptions)#>
     
     NSJSONReadingMutableContainers :返回的时可变容器
     NSJSONReadingMutableLeaves :返回的Json对象中字符串的值为NSMutableString
     NSJSONReadingAllowFragments :允许Json字符串最外层既不是NSArray也不是NSDictionary，但是必须是有效的Json Fragment
     */
    NSDictionary *dictionary = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingAllowFragments error:&error];
//    NSLog(@"dictionary = %@",dictionary);
//    
//    NSArray *array =  dictionary[@"statuses"];
//    NSLog(@"array = %@",[array[0]valueForKey:@"text"]);
    WeiboModel *weibo = [[WeiboModel alloc]initWithDictionary:dictionary];
    
   // NSLog(@"%@",weibo.statuses[0]);
    NSLog(@"%@",[weibo.statuses[0] objectForKey:@"text"]);
    self.textView.text = [weibo.statuses[0] objectForKey:@"text"];
    
}
//异步
- (IBAction)asynchronousGet:(id)sender {
    
    //拿到urlString
    NSString *urlString = @"https://api.weibo.com/2/statuses/friends_timeline/ids.json?access_token=2.00IujYFE8Evp8C32ce30bc02uNGpHE";
    
    //编码
    urlString = [urlString stringByAddingPercentEncodingWithAllowedCharacters:[NSCharacterSet URLQueryAllowedCharacterSet]];
    
    //转换成NSURL
    NSURL *url = [NSURL URLWithString:urlString];
    
    NSURLRequest *request = [NSURLRequest requestWithURL:url cachePolicy:NSURLRequestReloadIgnoringCacheData timeoutInterval:10];

    //异步请求有两种方式；一种是使用代理，一种是使用block
    //使用代理方式进行异步请求
    connentGet = [NSURLConnection connectionWithRequest:request delegate:self];
    
    //使用block
    [NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse * _Nullable response, NSData * _Nullable data, NSError * _Nullable connectionError) {
        NSDictionary *dictionary = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingAllowFragments error:nil];
        WeiboModel *weibo = [[WeiboModel alloc]initWithDictionary:dictionary];
        
        //NSLog(@"%@",[weibo.statuses[0] objectForKey:@"text"]);
        
        dispatch_async(dispatch_get_main_queue(), ^{
            self.textView.text = [weibo.statuses[0] objectForKey:@"text"];
        });//更新UI
    
    }];
    
    
    
}

#pragma mark~~~~~~~~~~~~协议~~~~~~~~~~~~~
//服务器开始响应，准备想客户发送数据
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
    NSLog(@"服务器开始响应，准备想客户发送数据");
    if (connection == connentGet) {
        mData = [NSMutableData data];
    }
    if (connection == connetionPost) {
        mPostData = [NSMutableData data];
    }
}

//从服务器接收数据，并且此方法会执行很多次
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
    NSLog(@"从服务器接收数据，并且此方法会执行很多次");
    if (connection == connentGet) {
        [mData appendData:data];
    }
    if (connection == connetionPost) {
       [mPostData appendData:data];
    }
    
    
}

//接收数据完成
- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
    NSLog(@"接收数据完成");
    if (connection == connentGet) {
        NSDictionary *dictionary = [NSJSONSerialization JSONObjectWithData:mData options:NSJSONReadingAllowFragments error:nil];//使用系统的解析工具解析mData
        
        WeiboModel *weibo = [[WeiboModel alloc]initWithDictionary:dictionary];
        
        //[self.textView performSelectorOnMainThread:@selector(setText:) withObject:[weibo.statuses[0] objectForKey:@"text"] waitUntilDone:NO];
        self.textView.text = [weibo.statuses[0] objectForKey:@"text"];
        /*
         更新UI最好在主线程中更新，原因如下：
         1.在子线程中是不能进行UI更新的，二可以更新的结果只有一个幻想：因为子线程代码执行完毕，又自动进入到主线程，执行了主线程中的UI更新的函数栈，这中间的时间非常短，就让大家误以为子线程可以更新UI，如果子线程一直在运行，则子线程中的UI更新的函数栈，主线程无法获知，既无法更新
         2.之哟普极少数的UI能，因为开辟线程时会获取当前环境，如点击某个按钮，这个按钮响应的方式是开辟一个子线程，在子线程中对该按钮进行UI更新是能及时的，如换标题，换背景音乐，但是这没有任何意义
         */

    }
    if (connection == connetionPost) {
        [NSJSONSerialization JSONObjectWithData:mPostData options:NSJSONReadingAllowFragments error:nil];
    }
}




- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end

建立model

//
//  WeiboModel.h
//  OC-13_02
//
//  Created by Ibokan on 15/12/28.
//  Copyright © 2015年 ibokan. All rights reserved.
//

#import <Foundation/Foundation.h>

@interface WeiboModel : NSObject

@property (nonatomic,strong)NSArray *statuses;

@property (nonatomic,strong)NSArray *advertises;

@property (nonatomic,strong)NSArray *ad;

@property (nonatomic,strong)NSNumber *hasvisible;
@property (nonatomic,strong)NSNumber *previous_cursor;
@property (nonatomic,strong)NSNumber *next_cursor;
@property (nonatomic,strong)NSNumber *total_number;
@property (nonatomic,strong)NSNumber *interval;
@property (nonatomic,strong)NSNumber *uve_blank;
@property (nonatomic,strong)NSNumber *since_id;
@property (nonatomic,strong)NSNumber *max_id;
@property (nonatomic,strong)NSNumber *has_unread;

-(id)initWithDictionary:(NSDictionary *)dictionary;

@end

//
//  WeiboModel.m
//  OC-13_02
//
//  Created by Ibokan on 15/12/28.
//  Copyright © 2015年 ibokan. All rights reserved.
//

#import "WeiboModel.h"

@implementation WeiboModel

-(id)initWithDictionary:(NSDictionary *)dictionary
{
    if (self == [super init]) {
        [self setValuesForKeysWithDictionary:dictionary];
    }
    return self;

}

@end

建立Main.storyboard

配置网络协议从HTTPS-》HTTP

在 info右击=>openAs=>SourceCode 第24行加入