一、基本使用
-(void)get
{
//1.确定URL
NSURL *url = [NSURL URLWithString:@"http://120.25.226.186:32812/login?username=hello&pwd=world&type=JSON"];
//2.创建请求对象
NSURLRequest *request =[NSURLRequest requestWithURL:url];
//3.创建会话对象
NSURLSession *session = [NSURLSession sharedSession];
//4.创建Task
/*
第一个参数:请求对象
第二个参数:completionHandler 当请求完成之后调用
data:响应体信息
response:响应头信息
error:错误信息当请求失败的时候 error有值
*/
NSURLSessionDataTask *dataTask = [session dataTaskWithRequest:request completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
//5.解析数据
NSLog(@"%@",[[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding]);
}];
//6.执行Task
[dataTask resume];
}
-(void)get2
{
//1.确定URL
NSURL *url = [NSURL URLWithString:@"http://120.25.226.186:32812/login?username=520it&pwd=520it&type=JSON"];
//2.创建请求对象
//NSURLRequest *request =[NSURLRequest requestWithURL:url];
//3.创建会话对象
NSURLSession *session = [NSURLSession sharedSession];
//4.创建Task
/*
第一个参数:请求路径
第二个参数:completionHandler 当请求完成之后调用
data:响应体信息
response:响应头信息
error:错误信息当请求失败的时候 error有值
注意:dataTaskWithURL 内部会自动的将请求路径作为参数创建一个请求对象(GET)
*/
NSURLSessionDataTask *dataTask = [session dataTaskWithURL:url completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
//6.解析数据
NSLog(@"%@",[[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding]);
}];
//5.执行Task
[dataTask resume];
}
-(void)post
{
//1.确定URL
NSURL *url = [NSURL URLWithString:@"http://120.25.226.186:32812/login"];
//2.创建请求对象
NSMutableURLRequest *request =[NSMutableURLRequest requestWithURL:url];
//2.1 设置请求方法为post
request.HTTPMethod = @"POST";
//2.2 设置请求体
request.HTTPBody = [@"username=520it&pwd=520it&type=JSON" dataUsingEncoding:NSUTF8StringEncoding];
//3.创建会话对象
NSURLSession *session = [NSURLSession sharedSession];
//4.创建Task
/*
第一个参数:请求对象
第二个参数:completionHandler 当请求完成之后调用 !!! 在子线程中调用
data:响应体信息
response:响应头信息
error:错误信息当请求失败的时候 error有值
*/
NSURLSessionDataTask *dataTask = [session dataTaskWithRequest:request completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
NSLog(@"%@",[NSThread currentThread]);
//6.解析数据
NSLog(@"%@",[[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding]);
}];
//5.执行Task
[dataTask resume];
}
二、NSURLSession代理方法
<NSURLSessionDataDelegate>
/** 接受响应体信息 */
@property (nonatomic, strong) NSMutableData *fileData;
{
if (_fileData == nil) {
_fileData = [NSMutableData data];
}
return _fileData;
}
//请求
//1.url
NSURL *url = [NSURL URLWithString:@"http://120.25.226.186:32812/login?username=123&pwd=123&type=JSON"];
//2.创建请求对象
NSURLRequest *request = [NSURLRequest requestWithURL:url];
//3.创建会话对象,设置代理
/*
第一个参数:配置信息 [NSURLSessionConfiguration defaultSessionConfiguration]
第二个参数:代理
第三个参数:设置代理方法在哪个线程中调用
*/
NSURLSession *session = [NSURLSession sessionWithConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration] delegate:self delegateQueue:[NSOperationQueue mainQueue]];
//4.创建Task
NSURLSessionDataTask *dataTask = [session dataTaskWithRequest:request];
//5.执行Task
[dataTask resume];
//代理方法
**
* 1.接收到服务器的响应 它默认会取消该请求
*
* @param session 会话对象
* @param dataTask 请求任务
* @param response 响应头信息
* @param completionHandler 回调 传给系统
*/
-(void)URLSession:(NSURLSession *)session dataTask:(NSURLSessionDataTask *)dataTask didReceiveResponse:(NSURLResponse *)response completionHandler:(void (^)(NSURLSessionResponseDisposition))completionHandler
{
NSLog(@"%s",__func__);
/*
NSURLSessionResponseCancel = 0,取消 默认
NSURLSessionResponseAllow = 1, 接收
NSURLSessionResponseBecomeDownload = 2, 变成下载任务
NSURLSessionResponseBecomeStream 变成流
*/
completionHandler(NSURLSessionResponseAllow);
}
/**
* 接收到服务器返回的数据 调用多次
*
* @param session 会话对象
* @param dataTask 请求任务
* @param data 本次下载的数据
*/
-(void)URLSession:(NSURLSession *)session dataTask:(NSURLSessionDataTask *)dataTask didReceiveData:(NSData *)data
{
NSLog(@"%s",__func__);
//拼接数据
[self.fileData appendData:data];
}
/**
* 请求结束或者是失败的时候调用
*
* @param session 会话对象
* @param dataTask 请求任务
* @param error 错误信息
*/
-(void)URLSession:(NSURLSession *)session task:(NSURLSessionTask *)task didCompleteWithError:(NSError *)error
{
NSLog(@"%s",__func__);
//解析数据
NSLog(@"%@",[[NSString alloc]initWithData:self.fileData encoding:NSUTF8StringEncoding]);
}
三、大文件下载
//1.url
NSURL *url = [NSURL URLWithString:@"http://120.25.226.186:32812/resources/images/minion_03.png"];
//2.创建请求对象
NSURLRequest *request = [NSURLRequest requestWithURL:url];
//3.创建session
NSURLSession *session = [NSURLSession sharedSession];
//4.创建Task
/*
第一个参数:请求对象
第二个参数:completionHandler 回调
location:
response:响应头信息
error:错误信息
*/
//该方法内部已经实现了边接受数据边写沙盒(tmp)的操作
NSURLSessionDownloadTask *downloadTask = [session downloadTaskWithRequest:request completionHandler:^(NSURL * _Nullable location, NSURLResponse * _Nullable response, NSError * _Nullable error) {
//6.处理数据
NSLog(@"%@---%@",location,[NSThread currentThread]);
//6.1 拼接文件全路径
NSString *fullPath = [[NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) lastObject] stringByAppendingPathComponent:response.suggestedFilename];
//6.2 剪切文件
[[NSFileManager defaultManager]moveItemAtURL:location toURL:[NSURL fileURLWithPath:fullPath] error:nil];
NSLog(@"%@",fullPath);
}];
//7.执行Task
[downloadTask resume];
}
2.大文件下载
/优点:不需要担心内存
//缺点:无法监听文件下载进度
-(void)download
{
//1.url
NSURL *url = [NSURL URLWithString:@"http://120.25.226.186:32812/resources/images/minion_03.png"];
//2.创建请求对象
NSURLRequest *request = [NSURLRequest requestWithURL:url];
//3.创建session
NSURLSession *session = [NSURLSession sharedSession];
//4.创建Task
/*
第一个参数:请求对象
第二个参数:completionHandler 回调
location:
response:响应头信息
error:错误信息
*/
//该方法内部已经实现了边接受数据边写沙盒(tmp)的操作
NSURLSessionDownloadTask *downloadTask = [session downloadTaskWithRequest:request completionHandler:^(NSURL * _Nullable location, NSURLResponse * _Nullable response, NSError * _Nullable error) {
//6.处理数据
NSLog(@"%@---%@",location,[NSThread currentThread]);
//6.1 拼接文件全路径
NSString *fullPath = [[NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) lastObject] stringByAppendingPathComponent:response.suggestedFilename];
//6.2 剪切文件
[[NSFileManager defaultManager]moveItemAtURL:location toURL:[NSURL fileURLWithPath:fullPath] error:nil];
NSLog(@"%@",fullPath);
}];
//7.执行Task
[downloadTask resume];
}
-(void)delegate
{
//1.url
NSURL *url = [NSURL URLWithString:@"http://120.25.226.186:32812/resources/images/minion_03.png"];
//2.创建请求对象
NSURLRequest *request = [NSURLRequest requestWithURL:url];
//3.创建session
NSURLSession *session = [NSURLSession sessionWithConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration] delegate:self delegateQueue:[NSOperationQueue mainQueue]];
//4.创建Task
NSURLSessionDownloadTask *downloadTask = [session downloadTaskWithRequest:request];
//5.执行Task
[downloadTask resume];
}
#pragma mark ----------------------
#pragma mark NSURLSessionDownloadDelegate
/**
* 写数据
*
* @param session 会话对象
* @param downloadTask 下载任务
* @param bytesWritten 本次写入的数据大小
* @param totalBytesWritten 下载的数据总大小
* @param totalBytesExpectedToWrite 文件的总大小
*/
-(void)URLSession:(NSURLSession *)session downloadTask:(NSURLSessionDownloadTask *)downloadTask didWriteData:(int64_t)bytesWritten totalBytesWritten:(int64_t)totalBytesWritten totalBytesExpectedToWrite:(int64_t)totalBytesExpectedToWrite
{
//1. 获得文件的下载进度
NSLog(@"%f",1.0 * totalBytesWritten/totalBytesExpectedToWrite);
}
/**
* 当恢复下载的时候调用该方法
*
* @param fileOffset 从什么地方下载
* @param expectedTotalBytes 文件的总大小
*/
-(void)URLSession:(NSURLSession *)session downloadTask:(NSURLSessionDownloadTask *)downloadTask didResumeAtOffset:(int64_t)fileOffset expectedTotalBytes:(int64_t)expectedTotalBytes
{
NSLog(@"%s",__func__);
}
/**
* 当下载完成的时候调用
*
* @param location 文件的临时存储路径
*/
-(void)URLSession:(NSURLSession *)session downloadTask:(NSURLSessionDownloadTask *)downloadTask didFinishDownloadingToURL:(NSURL *)location
{
NSLog(@"%@",location);
//1 拼接文件全路径
NSString *fullPath = [[NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) lastObject] stringByAppendingPathComponent:downloadTask.response.suggestedFilename];
//2 剪切文件
[[NSFileManager defaultManager]moveItemAtURL:location toURL:[NSURL fileURLWithPath:fullPath] error:nil];
NSLog(@"%@",fullPath);
}
/**
* 请求结束
*/
-(void)URLSession:(NSURLSession *)session task:(NSURLSessionTask *)task didCompleteWithError:(NSError *)error
{
NSLog(@"didCompleteWithError");
}
3.下载
@interface ViewController ()<NSURLSessionDownloadDelegate>
@property (nonatomic, strong) NSURLSessionDownloadTask *downloadTask;
@property (nonatomic, strong) NSData *resumData;
@property (nonatomic, strong) NSURLSession *session;
@implementation ViewController
- (IBAction)startBtnClick:(id)sender
{ //1.url
NSURL *url = [NSURL URLWithString:@"http://120.25.226.186:32812/resources/videos/minion_01.mp4"];
//2.创建请求对象
NSURLRequest *request = [NSURLRequest requestWithURL:url];
//3.创建session
NSURLSessionConfiguration *config = [NSURLSessionConfiguration defaultSessionConfiguration];
self.session = [NSURLSession sessionWithConfiguration:config delegate:self delegateQueue:[NSOperationQueue mainQueue]];
//4.创建Task
NSURLSessionDownloadTask *downloadTask = [self.session downloadTaskWithRequest:request];
//5.执行Task
[downloadTask resume];
self.downloadTask = downloadTask;
}
//暂停是可以恢复
- (IBAction)suspendBtnClick:(id)sender
{ NSLog(@"+++++++++++++++++++暂停");
[self.downloadTask suspend];
}
//cancel:取消是不能恢复
//cancelByProducingResumeData:是可以恢复
- (IBAction)cancelBtnClick:(id)sender
{
NSLog(@"+++++++++++++++++++取消");
//[self.downloadTask cancel];
//恢复下载的数据!=文件数据
[self.downloadTask cancelByProducingResumeData:^(NSData * _Nullable resumeData) {
self.resumData = resumeData;
}];
}
- (IBAction)goOnBtnClick:(id)sender
{
NSLog(@"+++++++++++++++++++恢复下载");
if(self.resumData)
{
self.downloadTask = [self.session downloadTaskWithResumeData:self.resumData];
}
[self.downloadTask resume];
}
//优点:不需要担心内存
//缺点:无法监听文件下载进度
-(void)download
{
//1.url
NSURL *url = [NSURL URLWithString:@"http://120.25.226.186:32812/resources/images/minion_03.png"];
//2.创建请求对象
NSURLRequest *request = [NSURLRequest requestWithURL:url];
//3.创建session
NSURLSession *session = [NSURLSession sharedSession];
//4.创建Task
/*
第一个参数:请求对象
第二个参数:completionHandler 回调
location:
response:响应头信息
error:错误信息
*/
//该方法内部已经实现了边接受数据边写沙盒(tmp)的操作
NSURLSessionDownloadTask *downloadTask = [session downloadTaskWithRequest:request completionHandler:^(NSURL * _Nullable location, NSURLResponse * _Nullable response, NSError * _Nullable error) {
//5.处理数据
NSLog(@"%@---%@",location,[NSThread currentThread]);
//5.1 拼接文件全路径
NSString *fullPath = [[NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) lastObject] stringByAppendingPathComponent:response.suggestedFilename];
//5.2剪切文件
[[NSFileManager defaultManager]moveItemAtURL:location toURL:[NSURL fileURLWithPath:fullPath] error:nil];
NSLog(@"%@",fullPath);
}];
//6.执行Task
[downloadTask resume];
}
#pragma mark ----------------------
#pragma mark NSURLSessionDownloadDelegate
/**
* 写数据
*
* @param session 会话对象
* @param downloadTask 下载任务
* @param bytesWritten 本次写入的数据大小
* @param totalBytesWritten 下载的数据总大小
* @param totalBytesExpectedToWrite 文件的总大小
*/
-(void)URLSession:(NSURLSession *)session downloadTask:(NSURLSessionDownloadTask *)downloadTask didWriteData:(int64_t)bytesWritten totalBytesWritten:(int64_t)totalBytesWritten totalBytesExpectedToWrite:(int64_t)totalBytesExpectedToWrite
{//1. 获得文件的下载进度
NSLog(@"%f",1.0 * totalBytesWritten/totalBytesExpectedToWrite);
}
/**
* 当恢复下载的时候调用该方法
*
* @param fileOffset 从什么地方下载
* @param expectedTotalBytes 文件的总大小
*/
-(void)URLSession:(NSURLSession *)session downloadTask:(NSURLSessionDownloadTask *)downloadTask didResumeAtOffset:(int64_t)fileOffset expectedTotalBytes:(int64_t)expectedTotalBytes
{NSLog(@"%s",__func__);
}
/**
* 当下载完成的时候调用
*
* @param location 文件的临时存储路径
*/
-(void)URLSession:(NSURLSession *)session downloadTask:(NSURLSessionDownloadTask *)downloadTask didFinishDownloadingToURL:(NSURL *)location
{
NSLog(@"%@",location);
//1 拼接文件全路径
NSString *fullPath = [[NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) lastObject] stringByAppendingPathComponent:downloadTask.response.suggestedFilename];
//2 剪切文件
[[NSFileManager defaultManager]moveItemAtURL:location toURL:[NSURL fileURLWithPath:fullPath] error:nil];
NSLog(@"%@",fullPath);
}
/**
* 请求结束
*/
-(void)URLSession:(NSURLSession *)session task:(NSURLSessionTask *)task didCompleteWithError:(NSError *)error
{
NSLog(@"didCompleteWithError");
}
2.通过文件句柄下载
<NSURLSessionDataDelegate>
@property (weak, nonatomic) IBOutlet UIProgressView *proessView;
/** 接受响应体信息 */
@property (nonatomic, strong) NSFileHandle *handle;
@property (nonatomic, assign) NSInteger totalSize;
@property (nonatomic, assign) NSInteger currentSize;
@property (nonatomic, strong) NSString *fullPath;
- (void)loadData{
//1.url
NSURL *url = [NSURL URLWithString:@"http://120.25.226.186:32812/resources/videos/minion_02.mp4"];
//2.创建请求对象
NSURLRequest *request = [NSURLRequest requestWithURL:url];
//3.创建会话对象,设置代理
/*
第一个参数:配置信息 [NSURLSessionConfiguration defaultSessionConfiguration]
第二个参数:代理
第三个参数:设置代理方法在哪个线程中调用
*/
NSURLSession *session = [NSURLSession sessionWithConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration] delegate:self delegateQueue:[NSOperationQueue mainQueue]];
//4.创建Task
NSURLSessionDataTask *dataTask = [session dataTaskWithRequest:request];
//5.执行Task
[dataTask resume];
}
#pragma mark NSURLSessionDataDelegate
/**
* 1.接收到服务器的响应 它默认会取消该请求
*
* @param session 会话对象
* @param dataTask 请求任务
* @param response 响应头信息
* @param completionHandler 回调 传给系统
*/
-(void)URLSession:(NSURLSession *)session dataTask:(NSURLSessionDataTask *)dataTask didReceiveResponse:(NSURLResponse *)response completionHandler:(void (^)(NSURLSessionResponseDisposition))completionHandler
{
//获得文件的总大小
self.totalSize = response.expectedContentLength;
//获得文件全路径
self.fullPath = [[NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) lastObject] stringByAppendingPathComponent:response.suggestedFilename];
//创建空的文件
[[NSFileManager defaultManager]createFileAtPath:self.fullPath contents:nil attributes:nil];
//创建文件句柄
self.handle = [NSFileHandle fileHandleForWritingAtPath:self.fullPath];
[self.handle seekToEndOfFile];
/*
NSURLSessionResponseCancel = 0,取消 默认
NSURLSessionResponseAllow = 1, 接收
NSURLSessionResponseBecomeDownload = 2, 变成下载任务
NSURLSessionResponseBecomeStream 变成流
*/
completionHandler(NSURLSessionResponseAllow);
}
/**
* 接收到服务器返回的数据 调用多次
*
* @param session 会话对象
* @param dataTask 请求任务
* @param data 本次下载的数据
*/
-(void)URLSession:(NSURLSession *)session dataTask:(NSURLSessionDataTask *)dataTask didReceiveData:(NSData *)data
{
//写入数据到文件
[self.handle writeData:data];
//计算文件的下载进度
self.currentSize += data.length;
NSLog(@"%f",1.0 * self.currentSize / self.totalSize);
self.proessView.progress = 1.0 * self.currentSize / self.totalSize;
}
/**
* 请求结束或者是失败的时候调用
*
* @param session 会话对象
* @param dataTask 请求任务
* @param error 错误信息
*/
-(void)URLSession:(NSURLSession *)session task:(NSURLSessionTask *)task didCompleteWithError:(NSError *)error
{
NSLog(@"%@",self.fullPath);
//关闭文件句柄
[self.handle closeFile];
self.handle = nil;
}
3.文件断点续传
@property (weak, nonatomic) IBOutlet UIProgressView *proessView;
/** 接受响应体信息 */
@property (nonatomic, strong) NSFileHandle *handle;
@property (nonatomic, assign) NSInteger totalSize;
@property (nonatomic, assign) NSInteger currentSize;
@property (nonatomic, strong) NSString *fullPath;
@property (nonatomic, strong) NSURLSessionDataTask *dataTask;
@property (nonatomic, strong) NSURLSession *session;
-(NSString *)fullPath
{
if (_fullPath == nil) {
//获得文件全路径
_fullPath = [[NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) lastObject] stringByAppendingPathComponent:FileName];
}
return _fullPath;
}
-(NSURLSession *)session
{
if (_session == nil) {
//3.创建会话对象,设置代理
/*
第一个参数:配置信息 [NSURLSessionConfiguration defaultSessionConfiguration]
第二个参数:代理
第三个参数:设置代理方法在哪个线程中调用
*/
_session = [NSURLSession sessionWithConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration] delegate:self delegateQueue:[NSOperationQueue mainQueue]];
}
return _session;
}
-(NSURLSessionDataTask *)dataTask
{
if (_dataTask == nil) {
//1.url
NSURL *url = [NSURL URLWithString:@"http://120.25.226.186:32812/resources/videos/minion_01.mp4"];
//2.创建请求对象
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
//3 设置请求头信息,告诉服务器请求那一部分数据
self.currentSize = [self getFileSize];
NSString *range = [NSString stringWithFormat:@"bytes=%zd-",self.currentSize];
[request setValue:range forHTTPHeaderField:@"Range"];
//4.创建Task
_dataTask = [self.session dataTaskWithRequest:request];
}
return _dataTask;
}
-(NSInteger)getFileSize
{
//获得指定文件路径对应文件的数据大小
NSDictionary *fileInfoDict = [[NSFileManager defaultManager]attributesOfItemAtPath:self.fullPath error:nil];
NSLog(@"%@",fileInfoDict);
NSInteger currentSize = [fileInfoDict[@"NSFileSize"] integerValue];
return currentSize;
}
- (IBAction)startBtnClick:(id)sender
{
[self.dataTask resume];
}
- (IBAction)suspendBtnClick:(id)sender
{
NSLog(@"_________________________suspend");
[self.dataTask suspend];
}
//注意:dataTask的取消是不可以恢复的
- (IBAction)cancelBtnClick:(id)sender
{
NSLog(@"_________________________cancel");
[self.dataTask cancel];
self.dataTask = nil;
}
- (IBAction)goOnBtnClick:(id)sender
{
NSLog(@"_________________________resume");
[self.dataTask resume];
}
#pragma mark ----------------------
#pragma mark NSURLSessionDataDelegate
/**
* 1.接收到服务器的响应 它默认会取消该请求
*
* @param session 会话对象
* @param dataTask 请求任务
* @param response 响应头信息
* @param completionHandler 回调 传给系统
*/
-(void)URLSession:(NSURLSession *)session dataTask:(NSURLSessionDataTask *)dataTask didReceiveResponse:(NSURLResponse *)response completionHandler:(void (^)(NSURLSessionResponseDisposition))completionHandler
{
//获得文件的总大小
//expectedContentLength 本次请求的数据大小
self.totalSize = response.expectedContentLength + self.currentSize;
if (self.currentSize == 0) {
//创建空的文件
[[NSFileManager defaultManager]createFileAtPath:self.fullPath contents:nil attributes:nil];
}
//创建文件句柄
self.handle = [NSFileHandle fileHandleForWritingAtPath:self.fullPath];
//移动指针
[self.handle seekToEndOfFile];
/*
NSURLSessionResponseCancel = 0,取消 默认
NSURLSessionResponseAllow = 1, 接收
NSURLSessionResponseBecomeDownload = 2, 变成下载任务
NSURLSessionResponseBecomeStream 变成流
*/
completionHandler(NSURLSessionResponseAllow);
}
/**
* 接收到服务器返回的数据 调用多次
*
* @param session 会话对象
* @param dataTask 请求任务
* @param data 本次下载的数据
*/
-(void)URLSession:(NSURLSession *)session dataTask:(NSURLSessionDataTask *)dataTask didReceiveData:(NSData *)data
{
//写入数据到文件
[self.handle writeData:data];
//计算文件的下载进度
self.currentSize += data.length;
NSLog(@"%f",1.0 * self.currentSize / self.totalSize);
self.proessView.progress = 1.0 * self.currentSize / self.totalSize;
}
/**
* 请求结束或者是失败的时候调用
*
* @param session 会话对象
* @param dataTask 请求任务
* @param error 错误信息
*/
-(void)URLSession:(NSURLSession *)session task:(NSURLSessionTask *)task didCompleteWithError:(NSError *)error
{ NSLog(@"%@",self.fullPath);
//关闭文件句柄
[self.handle closeFile];
self.handle = nil;
}
-(void)dealloc
{ //清理工作
//finishTasksAndInvalidate
[self.session invalidateAndCancel];
}
4、文件上传
#define Kboundary @"----WebKitFormBoundaryjv0UfA04ED44AhWx"
#define KNewLine [@"
" dataUsingEncoding:NSUTF8StringEncoding]
@interface ViewController ()<NSURLSessionDataDelegate>
/** 注释 */
@property (nonatomic, strong) NSURLSession *session;
-(NSURLSession *)session
{
if (_session == nil) {
NSURLSessionConfiguration *config = [NSURLSessionConfiguration defaultSessionConfiguration];
//是否运行蜂窝访问
config.allowsCellularAccess = YES;
config.timeoutIntervalForRequest = 15;
_session = [NSURLSession sessionWithConfiguration:config delegate:self delegateQueue:[NSOperationQueue mainQueue]];
}
return _session;
}
-(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{
[self upload2];
}
-(void)upload
{
//1.url
NSURL *url = [NSURL URLWithString:@"http://120.25.226.186:32812/upload"];
//2.创建请求对象
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
//2.1 设置请求方法
request.HTTPMethod = @"POST";
//2.2 设请求头信息
[request setValue:[NSString stringWithFormat:@"multipart/form-data; boundary=%@",Kboundary] forHTTPHeaderField:@"Content-Type"];
//3.创建会话对象
// NSURLSession *session = [NSURLSession sharedSession];
//4.创建上传TASK
/*
第一个参数:请求对象
第二个参数:传递是要上传的数据(请求体)
第三个参数:
*/
NSURLSessionUploadTask *uploadTask = [self.session uploadTaskWithRequest:request fromData:[self getBodyData] completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
//6.解析
NSLog(@"%@",[[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding]);
}];
//5.执行Task
[uploadTask resume];
}
-(void)upload2
{
//1.url
NSURL *url = [NSURL URLWithString:@"http://120.25.226.186:32812/upload"];
//2.创建请求对象
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
//2.1 设置请求方法
request.HTTPMethod = @"POST";
//2.2 设请求头信息
[request setValue:[NSString stringWithFormat:@"multipart/form-data; boundary=%@",Kboundary] forHTTPHeaderField:@"Content-Type"];
//3.创建会话对象
//4.创建上传TASK
/*
第一个参数:请求对象
第二个参数:传递是要上传的数据(请求体)
*/
NSURLSessionUploadTask *uploadTask = [self.session uploadTaskWithRequest:request fromData:[self getBodyData] completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
//6.解析
NSLog(@"%@",[[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding]);
}];
//5.执行Task
[uploadTask resume];
}
-(NSData *)getBodyData
{
NSMutableData *fileData = [NSMutableData data];
//5.1 文件参数
/*
--分隔符
Content-Disposition: form-data; name="file"; filename="Snip20160225_341.png"
Content-Type: image/png(MIMEType:大类型/小类型)
空行
文件参数
*/
[fileData appendData:[[NSString stringWithFormat:@"--%@",Kboundary] dataUsingEncoding:NSUTF8StringEncoding]];
[fileData appendData:KNewLine];
//name:file 服务器规定的参数
//filename:Snip20160225_341.png 文件保存到服务器上面的名称
//Content-Type:文件的类型
[fileData appendData:[@"Content-Disposition: form-data; name="file"; filename="Sss.png"" dataUsingEncoding:NSUTF8StringEncoding]];
[fileData appendData:KNewLine];
[fileData appendData:[@"Content-Type: image/png" dataUsingEncoding:NSUTF8StringEncoding]];
[fileData appendData:KNewLine];
[fileData appendData:KNewLine];
UIImage *image = [UIImage imageNamed:@"Snip20160226_90"];
//UIImage --->NSData
NSData *imageData = UIImagePNGRepresentation(image);
[fileData appendData:imageData];
[fileData appendData:KNewLine];
//5.2 非文件参数
/*
--分隔符
Content-Disposition: form-data; name="username"
空行
123456
*/
[fileData appendData:[[NSString stringWithFormat:@"--%@",Kboundary] dataUsingEncoding:NSUTF8StringEncoding]];
[fileData appendData:KNewLine];
[fileData appendData:[@"Content-Disposition: form-data; name="username"" dataUsingEncoding:NSUTF8StringEncoding]];
[fileData appendData:KNewLine];
[fileData appendData:KNewLine];
[fileData appendData:[@"123456" dataUsingEncoding:NSUTF8StringEncoding]];
[fileData appendData:KNewLine];
//5.3 结尾标识
/*
--分隔符--
*/
[fileData appendData:[[NSString stringWithFormat:@"--%@--",Kboundary] dataUsingEncoding:NSUTF8StringEncoding]];
return fileData;
}
#pragma mark NSURLSessionDataDelegate
/*
* @param bytesSent 本次发送的数据
* @param totalBytesSent 上传完成的数据大小
* @param totalBytesExpectedToSend 文件的总大小
*/
-(void)URLSession:(NSURLSession *)session task:(NSURLSessionTask *)task didSendBodyData:(int64_t)bytesSent totalBytesSent:(int64_t)totalBytesSent totalBytesExpectedToSend:(int64_t)totalBytesExpectedToSend
{
NSLog(@"%f",1.0 *totalBytesSent / totalBytesExpectedToSend);
}