////  ViewController.m//  03-掌握-NSURLSession#import "ViewController.h"@interface ViewController ()@end@implementation ViewController- (void)viewDidLoad {    [super viewDidLoad];        NSLog(@"%@", [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) lastObject]);    // Do any additional setup after loading the view, typically from a nib.}- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {    [self download];}- (void)download{    // 获得NSURLSession对象    NSURLSession *session = [NSURLSession sharedSession];        // 获得下载任务    NSURLSessionDownloadTask *task = [session downloadTaskWithURL:[NSURL URLWithString:@"http://120.25.226.186:32812/resources/videos/minion_01.mp4"] completionHandler:^(NSURL *location, NSURLResponse *response, NSError *error) {        // 文件将来存放的真实路径        NSString *file = [[NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) lastObject] stringByAppendingPathComponent:response.suggestedFilename];                // 剪切location的临时文件到真实路径        NSFileManager *mgr = [NSFileManager defaultManager];        [mgr moveItemAtURL:location toURL:[NSURL fileURLWithPath:file] error:nil];    }];        // 启动任务    [task resume];}- (void)post{    // 获得NSURLSession对象    NSURLSession *session = [NSURLSession sharedSession];        // 创建请求    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:@"http://120.25.226.186:32812/login"]];    request.HTTPMethod = @"POST"; // 请求方法    request.HTTPBody = [@"username=520it&pwd=520it" dataUsingEncoding:NSUTF8StringEncoding]; // 请求体        // 创建任务    NSURLSessionDataTask *task = [session dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {        NSLog(@"%@", [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:nil]);    }];        // 启动任务    [task resume];}- (void)get2{    // 获得NSURLSession对象    NSURLSession *session = [NSURLSession sharedSession];        // 创建任务    NSURLSessionDataTask *task = [session dataTaskWithURL:[NSURL URLWithString:@"http://120.25.226.186:32812/login?username=123&pwd=4324"] completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {        NSLog(@"%@", [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:nil]);    }];        // 启动任务    [task resume];}- (void)get{    // 获得NSURLSession对象    NSURLSession *session = [NSURLSession sharedSession];        // 创建任务    NSURLSessionDataTask *task = [session dataTaskWithRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:@"http://120.25.226.186:32812/login?username=123&pwd=4324"]] completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {        NSLog(@"%@", [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:nil]);    }];        // 启动任务    [task resume];}@end

////  ViewController.m//  04-掌握-NSURLSession-代理方法#import "ViewController.h"@interface ViewController () <NSURLSessionDataDelegate, NSURLConnectionDataDelegate>@end@implementation ViewController- (void)viewDidLoad {    [super viewDidLoad];    // Do any additional setup after loading the view, typically from a nib.}- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {    // 获得NSURLSession对象    NSURLSession *session = [NSURLSession sessionWithConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration] delegate:self delegateQueue:[[NSOperationQueue alloc] init]];        // 创建任务    NSURLSessionDataTask *task = [session dataTaskWithRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:@"http://120.25.226.186:32812/login?username=123&pwd=4324"]]];        // 启动任务    [task resume];}#pragma mark - <NSURLSessionDataDelegate>/** * 1.接收到服务器的响应 */- (void)URLSession:(NSURLSession *)session dataTask:(NSURLSessionDataTask *)dataTask didReceiveResponse:(NSURLResponse *)response completionHandler:(void (^)(NSURLSessionResponseDisposition))completionHandler{    NSLog(@"%s", __func__);        // 允许处理服务器的响应，才会继续接收服务器返回的数据    completionHandler(NSURLSessionResponseAllow);        // void (^)(NSURLSessionResponseDisposition)}/** * 2.接收到服务器的数据（可能会被调用多次） */- (void)URLSession:(NSURLSession *)session dataTask:(NSURLSessionDataTask *)dataTask didReceiveData:(NSData *)data{    NSLog(@"%s", __func__);}/** * 3.请求成功或者失败（如果失败，error有值） */- (void)URLSession:(NSURLSession *)session task:(NSURLSessionTask *)task didCompleteWithError:(NSError *)error{    NSLog(@"%s", __func__);}@end