一剥险、異步
1萍聊、GET請求（BLOCK）
//初始化一個session
NSURLSession *session = [NSURLSession sharedSession];
//通過地址得到一個url
NSString *urlStr = @"http://ipad-bjwb.bjd.com.cn/DigitalPublication/publish/Handler/APINewsList.ashx?date=20151101&startRecord=1&len=5&udid=1234567890&terminalType=Iphone&cid=213";
NSURL *url = [NSURL URLWithString:urlStr];
//通過單例的session得到一個sessionTask喇澡，且通過URL初始化task 在block內部可以直接對返回的數據進行處理
NSURLSessionTask *task = [session dataTaskWithURL:url completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
//請求之后會調用這個block
NSString *resultStr = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
NSLog(@"resultStr->%@",resultStr);
}];
//啟動人物,讓task開始之前執(zhí)行
[task resume];
2黄刚、POST請求（BLOCK）
NSString *urlString = @"http://ipad-bjwb.bjd.com.cn/DigitalPublication/publish/Handler/APINewsList.ashx";
NSURL *url = [NSURL URLWithString:urlString];
//初始化request 并配置httpBody httpMethod
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url cachePolicy:0 timeoutInterval:30];
request.HTTPBody = [@"date=20151101&startRecord=1&len=5&udid=1234567890&terminalType=Iphone&cid=213" dataUsingEncoding:NSUTF8StringEncoding];
request.HTTPMethod = @"POST";
//配置session 并讓task開始執(zhí)行
NSURLSession *session = [NSURLSession sharedSession];
NSURLSessionTask *task = [session dataTaskWithRequest:request completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
NSString *resultStr = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
NSLog(@"resultStr->%@",resultStr);
}];
[task resume];
3灵寺、Delegate請求
#pragma mark - NSURLSessionDataDelegate代理方法
//服務器開始響應蹦骑，客戶端將要接收數據
- (void)URLSession:(NSURLSession *)session dataTask:(NSURLSessionDataTask *)dataTask didReceiveResponse:(NSURLResponse *)response
completionHandler:(void (^)(NSURLSessionResponseDisposition disposition))completionHandler
{
//允許服務器開始響應
completionHandler(NSURLSessionResponseAllow);
//? ? NSHTTPURLResponse *httpResponse = (NSHTTPURLResponse *)response;
self.mulData = [NSMutableData data];
}
//接收數據(會調用多次)
- (void)URLSession:(NSURLSession *)session dataTask:(NSURLSessionDataTask *)dataTask didReceiveData:(NSData *)data
{
//處理每次接受到得數據
//將每次接收到的data片段慈省，拼接到_mulData
[_mulData appendData:data];
}
//數據接收完成,網絡請求成功
-(void)URLSession:(NSURLSession *)session task:(NSURLSessionTask *)task didCompleteWithError:(NSError *)error
{
NSLog(@"result->%@",[[NSString alloc]initWithData:_mulData encoding:NSUTF8StringEncoding]);
}
