//

//  ViewController.m

//  NSURLSession代理簡介

#import "ViewController.h"

@interface ViewController ()<NSURLSessionDataDelegate>

@end

@implementation ViewController

- (void)viewDidLoad {

    [super viewDidLoad];

}

//這是為了測試而建立的點擊屏幕事件。

-(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{

    //代理 測試

    NSURL * url = [NSURL URLWithString:@"http://localhost/login.php?username=haha&password=123"];

    //創(chuàng)建自定義Session

    NSURLSession * session = [NSURLSession sessionWithConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration] delegate:self delegateQueue:[[NSOperationQueue alloc]init]];

    NSURLSessionTask * task = [session dataTaskWithURL:url];

    //開啟任務(wù)

    [task resume];

}

#pragma mark - deleDate

//接受到服務(wù)器響應(yīng)

-(void)URLSession:(NSURLSession *)session dataTask:(NSURLSessionDataTask *)dataTask didReceiveResponse:(NSURLResponse *)response completionHandler:(void (^)(NSURLSessionResponseDisposition))completionHandler

{

    //__FUNCTION__ c語言字符串用s

    NSLog(@"%s",__FUNCTION__);

    //允許服務(wù)器回傳數(shù)據(jù)

    completionHandler(NSURLSessionResponseAllow);

}

//接受服務(wù)器回傳的數(shù)據(jù)可能執(zhí)行多次

-(void)URLSession:(NSURLSession *)session dataTask:(NSURLSessionDataTask *)dataTask didReceiveData:(NSData *)data{

    NSLog(@"%@",[[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding]);

}

//請求成功或者失敗

-(void)URLSession:(NSURLSession *)session didBecomeInvalidWithError:(NSError *)error{

    NSLog(@"%@",error);

}

@end

 //

 //  ViewController.m

 //  NSURLSession大文件下載

 //

 //

 #import "ViewController.h"

 @interface ViewController ()<NSURLSessionDownloadDelegate>

 @property (nonatomic, strong) NSURLSessionDownloadTask * task;

 @property (nonatomic, strong) NSData * resumeData;

 @property (nonatomic, strong) NSURLSession * session;

 @end

 @implementation ViewController

 - (IBAction)start:(id)sender {

     NSURLSession * session = [NSURLSession sessionWithConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration] delegate:self delegateQueue:[[NSOperationQueue alloc] init]];

     self.session = session;

     self.task = [session downloadTaskWithURL:[NSURL URLWithString:[@"http://192.168.1.200/DOM解析.mp4"stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]]];

     [self.task resume];

 }

 - (IBAction)pause:(id)sender {

     //暫停就是將任務(wù)掛起

     [self.task cancelByProducingResumeData:^(NSData * _Nullable resumeData) {

         //保存已下載的數(shù)據(jù)

         self.resumeData = resumeData;

     }];

 }

 - (IBAction)resume:(id)sender {

     //可以使用ResumeData創(chuàng)建任務(wù)

     self.task = [self.session downloadTaskWithResumeData:self.resumeData];

     //開啟繼續(xù)下載

     [self.task resume];

 }

 - (void)viewDidLoad {

     [super viewDidLoad];

     // Do any additional setup after loading the view, typically from a nib.

     NSLog(@"%@",NSSearchPathForDirectoriesInDomains(, , ));

 }

 /* 

  監(jiān)測臨時文件下載的數(shù)據(jù)大小，當(dāng)每次寫入臨時文件時，就會調(diào)用一次

  bytesWritten 單次寫入多少

  totalBytesWritten  已經(jīng)寫入了多少

  totalBytesExpectedToWrite 文件總大小

  */

 - (void)URLSession:(NSURLSession *)session downloadTask:(NSURLSessionDownloadTask *)downloadTask

       didWriteData:(int64_t)bytesWritten

  totalBytesWritten:(int64_t)totalBytesWritten

 totalBytesExpectedToWrite:(int64_t)totalBytesExpectedToWrite {

     //打印下載百分比

     NSLog(@"%f",totalBytesWritten * 1.0 / totalBytesExpectedToWrite);

 }

 //下載完成

 - (void)URLSession:(NSURLSession *)session downloadTask:(NSURLSessionDownloadTask *)downloadTask

 didFinishDownloadingToURL:(NSURL *)location {

     NSString * cachesPath = [[NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) lastObject] stringByAppendingPathComponent:downloadTask.response.suggestedFilename];

     NSFileManager * mgr = [NSFileManager defaultManager];

     [mgr moveItemAtURL:location toURL:[NSURL fileURLWithPath:cachesPath] error:NULL];

 }

 - (void)URLSession:(NSURLSession *)session task:(NSURLSessionTask *)task didCompleteWithError:(NSError *)error {

     NSLog(@"%@",error);

 }

 - (void)didReceiveMemoryWarning {

     [super didReceiveMemoryWarning];

     // Dispose of any resources that can be recreated.

 }

 @end