1.ViewController.h

import "ViewController.h"

@interface ViewController ()
{
long long _totalLenght;
}

@property(nonatomic,strong)NSMutableData * receivedData;

@end

@implementation ViewController

• (void)viewDidLoad {
  [super viewDidLoad];

}

• (IBAction)GetButtonAction:(id)sender {
  //創(chuàng)建URL
  NSURL * url = [NSURL URLWithString:@"http://ipad-bjwb.bjd.com.cn/DigitalPublication/publish/Handler/APINewsList.ashx?date=20131129&startRecord=1&len=5&udid=1234567890&terminalType=Iphone&cid=213"];
  //創(chuàng)建網(wǎng)絡(luò)請求
  NSURLRequest * request = [[NSURLRequest alloc]initWithURL:url cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:10];
  //連接服務(wù)器
  NSData * recieved = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
  NSString * str = [[NSString alloc] initWithData:recieved encoding:NSUTF8StringEncoding];
  NSLog(@"%@",str);

}

• (IBAction)PostButtonAction:(id)sender {
  //創(chuàng)建URL
  NSString * string =@"http://ipad-bjwb.bjd.com.cn/DigitalPublication/publish/Handler/APINewsList.ashx";
  NSURL * url = [NSURL URLWithString:string];
  //創(chuàng)建請求
  NSString * postStr = @"date=20131129&startRecord=1&len=5&udid=1234567890&terminalType=Iphone&cid=213";
  //進(jìn)行網(wǎng)絡(luò)請求
  NSData * poatData = [postStr dataUsingEncoding:NSUTF8StringEncoding];
  NSMutableURLRequest * requedt =[[NSMutableURLRequest alloc] initWithURL:url cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:10];
  //設(shè)置請求方式為post，默認(rèn)Get
  [requedt setHTTPMethod:@"post"];
  //設(shè)置參數(shù)
  [requedt setHTTPBody:poatData];
  //進(jìn)行連接服務(wù)器
  NSData * recieved = [NSURLConnection sendSynchronousRequest:requedt returningResponse:nil error:nil];
  //轉(zhuǎn)換
  NSString * backstr = [[NSString alloc] initWithData:recieved encoding:NSUTF8StringEncoding];
  NSLog(@"%@",backstr);

}

• (IBAction)DelegateButton:(id)sender {
  NSString * strUrl=@"http://ipad-bjwb.bjd.com.cn/DigitalPublication/publish/Handler/APINewsList.ashx?date=20131129&startRecord=1&len=5&udid=1234567890&terminalType=Iphone&cid=213";
  NSURL * url = [NSURL URLWithString:strUrl];
  NSURLRequest * request = [NSURLRequest requestWithURL:url];
  //連接服務(wù)器
  [NSURLConnection connectionWithRequest:request delegate:self];
  //

}

pragma mark ---NSURLConnection 代理方法

//服務(wù)器開始響應(yīng)，準(zhǔn)備返回?cái)?shù)據(jù)
-(void)connection:(NSURLConnection *)connection didReceiveResponse:(nonnull NSURLResponse *)response{

//記錄數(shù)據(jù)的總長度，但是也可能沒有（由服務(wù)器決定）
_totalLenght = response.expectedContentLength;

//網(wǎng)絡(luò)??基于http協(xié)議時(shí)（url是以http開頭），reponse本質(zhì)就是NSHTTPURLResponse類型的
NSHTTPURLResponse * httpResponse = (NSHTTPURLResponse *)response;
//創(chuàng)建空的可變的data，接收服務(wù)器的data片段
self.receivedData= [NSMutableData dataWithCapacity:40];

 //NSLog(@"---%s",__FUNCTION__);

}
//客戶端接收數(shù)據(jù)
-(void)connection:(NSURLConnection *)connection didReceiveData:(nonnull NSData *)data{

 //NSLog(@"---%s",__FUNCTION__);
[_receivedData appendData:data];

}
//數(shù)據(jù)接收成功,網(wǎng)絡(luò)請求成功:
-(void)connectionDidFinishLoading:(NSURLConnection *)connection
{
NSLog(@"---%s",FUNCTION);
//開始處理數(shù)據(jù)
NSString * result = [[NSString alloc] initWithData:_receivedData encoding:NSUTF8StringEncoding];
NSLog(@"result =%@",result);

}

//網(wǎng)絡(luò)請求失敗:
-(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
{
NSLog(@"---%s",FUNCTION);
}

• (IBAction)BlokButton:(id)sender {
  NSString* string = @"http://blog.csdn.net/dianziagen/article/details/70185911";
  NSURL * url = [NSURL URLWithString:string];
  NSURLRequest * request = [NSURLRequest requestWithURL:url];
  //建立連接
  [NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse * _Nullable response, NSData * _Nullable data, NSError * _Nullable connectionError) {

    //DAta是服務(wù)器返回的完整數(shù)據(jù)
    //數(shù)據(jù)處理
    NSString * result = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
    NSLog(@"%@",result);
  

  }];

}