NSURLConnection网络处理和NSURLSession网络处理

#import "ViewController.h"

@interface ViewController ()<NSURLConnectionDataDelegate>
@property (nonatomic,strong) NSMutableData *receiveData;
@end

@implementation ViewController
//getter方法
-(NSMutableData *)receiveData
{
    if (_receiveData == nil) {
        _receiveData = [NSMutableData data];
    }
    return _receiveData;
}
- (void)viewDidLoad {
    [super viewDidLoad];
//    //创建URL对象
//    NSURL *url = [NSURL URLWithString:@"http://www.baidu.com/s?wd=wtb"];
//    NSLog(@"%@",url);
//    //协议
//    NSLog(@"scheme:%@",url.scheme);
//    //域名
//    NSLog(@"HOST:%@",url.host);
//    //Query查询语句,是问号之后的语句
//    NSLog(@"query:%@",url.query);
//    //Path路径
//    NSLog(@"path:%@",url.path);
//    
//    //创建
//    NSURLRequest *request = [NSURLRequest requestWithURL:url];
    //使用网络链接类NSURLConnection发送网络请求
    
    //同步的网络请求
//   NSData *data = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
//    NSLog(@"%@",[[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding]);
//    
//    NSURLRequest *request1 = [NSURLRequest requestWithURL:url cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:30];
    
    //创建url对象
    NSURL *url2 = [NSURL URLWithString:@"http://ipad-bjwb.bjd.com.cn/DigitalPublication/publish/Handler/APINewsList.ashx?date=20151101&startRecord=1&len=5&udid=1234567890&terminalType=Iphone&cid=213"];
    //创建NSURLRequest对象
    NSURLRequest *request2 = [NSURLRequest requestWithURL:url2];
    //使用NSURLConnection网络连接器发送异步代理请求
//    [NSURLConnection connectionWithRequest:request2 delegate:self];
    
    //异步Block请求,使用Block的时候,代理不起作用,二者只能存在其一,但是session可以,session只有异步,没有同步
    [NSURLConnection sendAsynchronousRequest:request2 queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse * _Nullable response, NSData * _Nullable data, NSError * _Nullable connectionError) {
        NSString *str = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
        NSLog(@"%@",str);
    }];
    
    
}
//开始发送请求
-(NSURLRequest *)connection:(NSURLConnection *)connection willSendRequest:(NSURLRequest *)request redirectResponse:(NSURLResponse *)response
{
    return request;
}
//接收到服务器响应Response
-(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
    NSLog(@"接受的响应:%@",response);
    //HTTPResponse
    NSHTTPURLResponse *httpResponse = (NSHTTPURLResponse *)response;
    long long length = [httpResponse expectedContentLength];
    NSLog(@"%lld",length);
}
//接收到data
-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
    [self.receiveData appendData:data];
    NSLog(@"%ld",data.length);
}
//接收数据完成
-(void)connectionDidFinishLoading:(NSURLConnection *)connection
{
    NSLog(@"接收完成");
    NSString *str = [[NSString alloc] initWithData:self.receiveData encoding:NSUTF8StringEncoding];
    NSLog(@"%@",str);
}

//请求出错
-(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error

{
    NSLog(@"请求出错");
    
}
- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end

2.NSURLSession网络处理,都有的是代理和block ,session以后把同步删了，想同步用过期的NSURLSesssion

#import "ViewController.h"

@interface ViewController ()<NSURLSessionDataDelegate>

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    //由于浏览器不支持中文,所以要进行汉字转码
    NSString *str = @"http://www.baidu.com/s?wd=滑板鞋";
    NSString *result = [str stringByAddingPercentEncodingWithAllowedCharacters:[NSCharacterSet characterSetWithCharactersInString:str]];
    NSURL *url = [NSURL URLWithString:result];
    
    //创建request
    NSURLRequest *request = [[NSURLRequest alloc] initWithURL:url];
//    //异步block请求
//    [NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse * _Nullable response, NSData * _Nullable data, NSError * _Nullable connectionError) {
//        NSLog(@"%@",data);
//        NSLog(@"%@",connectionError);
//    }];
    
    //创建数据请求任务
//    NSURLSessionDataTask *dataTask = [[NSURLSession sharedSession] dataTaskWithURL:url completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
//        NSLog(@"%@",error);
//    }];
//    //恢复请求任务
//    [dataTask resume];
    
    //创建一个POST请求
    NSURL *url2= [NSURL URLWithString:@"http://ipad-bjwb.bjd.com.cn/DigitalPublication/publish/Handler/APINewsList.ashx"];
    //创建请求request
    NSMutableURLRequest *mRequest = [NSMutableURLRequest requestWithURL:url2];
    //设置请求方式为POST,添加body体
    mRequest.HTTPMethod = @"POST";
    mRequest.HTTPBody = [@"date=20151101&startRecord=1&len=5&udid=1234567890&terminalType=Iphone&cid=213" dataUsingEncoding:NSUTF8StringEncoding];
    //
//    NSURLSessionDataTask *postDataTask = [[NSURLSession sharedSession] dataTaskWithRequest:mRequest completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
//        NSString *str = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
//        NSLog(@"%@",str);
//    }];
//    [postDataTask resume];
    
    
    
    //使用NSURLSessionDataDelegate
    NSURLSession *session = [NSURLSession sessionWithConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration] delegate:self delegateQueue:[NSOperationQueue mainQueue]];
//    //创建数据请求任务
    
    //1.block
//    NSURLSessionDataTask *dataTask = [session dataTaskWithRequest:mRequest completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
//        NSLog(@"%@",data);
//    }];
//    //
//    [dataTask resume];
    
    //2.代理
    NSURLSessionDataTask *dataTask =[session dataTaskWithRequest:mRequest];
    [dataTask resume];
    
}
//接收服务器响应
-(void)URLSession:(NSURLSession *)session dataTask:(NSURLSessionDataTask *)dataTask didReceiveResponse:(NSURLResponse *)response completionHandler:(void (^)(NSURLSessionResponseDisposition))completionHandler
{
    NSLog(@"接收到服务器响应");
    //允许服务器继续发送数据
    completionHandler(NSURLSessionResponseAllow);
}
//接收到数据
-(void)URLSession:(NSURLSession *)session dataTask:(NSURLSessionDataTask *)dataTask didReceiveData:(NSData *)data
{
    NSLog(@"%ld",data.length);
}
//接收数据完成
-(void)URLSession:(NSURLSession *)session task:(NSURLSessionTask *)task didCompleteWithError:(NSError *)error

{
    NSLog(@"接收数据完成");

}

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