NSURLSessionBaseDemo
@interface ViewController ()<NSURLSessionDataDelegate>
//存放请求返回的数据
@property (nonatomic,strong) NSMutableData *resultData;
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
//
// NSURLSession
//1 NSURL
NSURL *url = [NSURL URLWithString:@"http://10.0.8.8/sns/my/user_list.php"];
// 2(get)NSURLRequest
// NSURLRequest *request = [NSURLRequest requestWithURL:url];
// 2(post) NSMutableURLRequest
NSMutableURLRequest *request =[NSMutableURLRequest requestWithURL:url ];
request.HTTPMethod = @"post";
//post 传参数
request.HTTPBody = [@"number=10&page=2" dataUsingEncoding:NSUTF8StringEncoding];
//首先需要一个工作模式 1.普通的任务（get post）2.瞬时任务 3.后台任务
//3 工作模式 默认工作模式
NSURLSessionConfiguration *config = [NSURLSessionConfiguration defaultSessionConfiguration];
//请求的超时时间
config.timeoutIntervalForRequest = 60;
//4 创建NSURLSession
NSURLSession *session = [NSURLSession sessionWithConfiguration:config delegate:self delegateQueue:[NSOperationQueue mainQueue]];
//5 下载任务task
NSURLSessionDataTask *dataTask = [session dataTaskWithRequest:request];
//6 开始任务
[dataTask resume];
}
#pragma mark - NSURLSessionDataDelegae
- (void)URLSession:(NSURLSession *)session dataTask:(nonnull NSURLSessionDataTask *)dataTask didReceiveResponse:(nonnull NSURLResponse *)response completionHandler:(nonnull void (^)(NSURLSessionResponseDisposition))completionHandler {
//
NSLog(@"请求已经开始了，收到了回应 %@",response);
// "Content-Type" = "text/html"; 返回的内容类型
// "Content-Length" = 750; 内容的长度，将要下载的数据有多大
// status code: 200, 状态码
// URL: http://10.0.8.8/sns/my/user_list.php 我们请求的接口
//所有响应头内容（response响应）
NSDictionary *responseHeader = [(NSHTTPURLResponse*)response allHeaderFields];
NSLog(@"%@",responseHeader[@"Content-Length"]);
//初始化 存放数据的data
_resultData = [[NSMutableData alloc]init];
//这个block 一定要调用
completionHandler(NSURLSessionResponseAllow);
}
// 接受数据
- (void)URLSession:(NSURLSession *)session dataTask:(nonnull NSURLSessionDataTask *)dataTask didReceiveData:(nonnull NSData *)data {
NSLog(@"接受到数据 %ld",data.length);
//每次接受到数据的时候，都添加resultdata中
[self.resultData appendData:data];
}
- (void)URLSession:(NSURLSession *)session task:(NSURLSessionTask *)task didCompleteWithError:(NSError *)error {
NSLog(@"请求结束了");
if (error) {
NSLog(@"请求失败了 %@",error);
}else {
NSLog(@"请求成功了");
//json 解析
NSDictionary *dict = [NSJSONSerialization JSONObjectWithData:self.resultData options:NSJSONReadingMutableContainers error:nil];
NSLog(@"%@",dict);
}
}