作者:Mitchell
一霞幅、NSURLConnection
- iOS7之后不建議使用
- GET請求
- 發(fā)送同步請求
// 1.創(chuàng)建一個(gè)URL
NSURL *url = [NSURL URLWithString:@"httpAddress"];
// 2.根據(jù)URL創(chuàng)建NSURLRequest對象
// 默認(rèn)情況下NSURLRequest會(huì)自動(dòng)給我們設(shè)置好請求頭
// request默認(rèn)情況下就是GET請求
NSURLRequest *request = [NSURLRequest requestWithURL:url];
// 3.利用NSURLConnection對象發(fā)送請求
/*
第一個(gè)參數(shù): 需要請求的對象
第二個(gè)參數(shù): 服務(wù)返回給我們的響應(yīng)頭信息
第三個(gè)參數(shù): 錯(cuò)誤信息
返回值: 服務(wù)器返回給我們的響應(yīng)體
*/
// NSURLResponse *response = nil;
NSHTTPURLResponse *response = nil; // 真實(shí)類型
// 注意點(diǎn): 如果是調(diào)用NSURLConnection的同步方法, 會(huì)阻塞當(dāng)前線程
NSData *data = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:nil];
- 發(fā)送異步請求
// 1.創(chuàng)建一個(gè)URL
NSURL *url = [NSURL URLWithString:@"httpAddress"];
// 2.根據(jù)URL創(chuàng)建NSURLRequest對象
// 默認(rèn)情況下NSURLRequest會(huì)自動(dòng)給我們設(shè)置好請求頭
// request默認(rèn)情況下就是GET請求
NSURLRequest *request = [NSURLRequest requestWithURL:url];
// 3.利用NSURLConnection對象發(fā)送請求
/*
第一個(gè)參數(shù): 需要請求的對象
第二個(gè)參數(shù): 回調(diào)block的隊(duì)列, 決定了block在哪個(gè)線程中執(zhí)行
第三個(gè)參數(shù): 回調(diào)block
*/
// 注意點(diǎn): 如果是調(diào)用NSURLConnection的同步方法, 會(huì)阻塞當(dāng)前線程
[NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {
/*
response: 響應(yīng)頭
data : 響應(yīng)體
connectionError : 錯(cuò)誤信息
*/
// NSLog(@"%@", [NSThread currentThread]);
NSLog(@"%@", [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding]);
}];
- POST請求:
// 1.創(chuàng)建一個(gè)URL
NSURL *url = [NSURL URLWithString:@"http://admin/login"];
// 2.根據(jù)URL創(chuàng)建NSURLRequest對象
// NSURLRequest *request = [NSURLRequest requestWithURL:url];
/*
NSMutableURLRequest中保存了請求的地址/請求頭/請求體
*/
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
// 2.1設(shè)置請求方式
// 注意: POST一定要大寫
request.HTTPMethod = @"POST";
// 2.2設(shè)置請求體
// 注意: 如果是給POST請求傳遞參數(shù): 那么不需要寫?號
request.HTTPBody = [@"username=Mitchell&pwd=123456&type=JSON" dataUsingEncoding:NSUTF8StringEncoding];
// 3.利用NSURLConnection對象發(fā)送請求
[NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {
NSLog(@"%@", [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding]);
}];
- NSURLConnection 與 NSRunLoop 的關(guān)聯(lián)使用
- 主要是區(qū)分 NSURLConnection 在主線程和子線程發(fā)送網(wǎng)絡(luò)請求的區(qū)別
- 主線程
- 1康谆、 直接發(fā)送網(wǎng)絡(luò)請求副硅,發(fā)送是異步的酪呻,但是代理方法是在主線程中執(zhí)行的:
NSURL*url = [NSURL URLWithString:@"http://mvvideo1.meitudata.com/55d99e5939342913.mp4"];
NSURLRequest*request = [NSURLRequest requestWithURL:url];
//這里分兩種方式發(fā)送請求
//2.1 直接發(fā)送網(wǎng)絡(luò)請求是異步的,但是回調(diào)方法是在主線程中執(zhí)行的
//[[NSURLConnection alloc]initWithRequest:request delegate:self];
* 2掉奄、如果按照如下設(shè)置,那么回調(diào)的代理方法也會(huì)運(yùn)行在子線程中:
NSURL*url = [NSURL URLWithString:@"http://mvvideo1.meitudata.com/55d99e5939342913.mp4"];
NSURLRequest*request = [NSURLRequest requestWithURL:url];
//2.2 設(shè)置回調(diào)方法也在子線程中運(yùn)行
NSURLConnection*conn = [[NSURLConnection alloc]initWithRequest:request delegate:self startImmediately:NO];
[conn setDelegateQueue:[[NSOperationQueue alloc] init]];
[conn start];
- 子線程
* `因?yàn)?NSURLConnection 是局部變量`夫否,當(dāng)我們創(chuàng)建的時(shí)候其實(shí)是會(huì)默認(rèn)`添加到當(dāng)前的 RunLoop 中`,如果是在主線程添加叫胁,主線程的 RunLoop 是默認(rèn)有的凰慈,無須我們創(chuàng)建,`然而如果再子線程中驼鹅,是默認(rèn)沒有 RunLoop 和輸入源的微谓,所以需要給子線程手動(dòng)添加 RunLoop` 。
* 為什么使用 `start` 方法就可以呢输钩?
因?yàn)?start
方法如果沒有 RunLoop 豺型,會(huì)默認(rèn)添加一個(gè) RunLoop 到當(dāng)前的線程中來。
dispatch_queue_t queue = dispatch_get_global_queue(0, 0);
dispatch_async(queue, ^{
NSURL*url = [NSURL URLWithString:@"http://mvvideo1.meitudata.com/55d99e5939342913.mp4"];
NSURLRequest*request = [NSURLRequest requestWithURL:url];
//2.1 這么設(shè)置還是可以的
//NSURLConnection*conn = [[NSURLConnection alloc]initWithRequest:request delegate:self startImmediately:NO];
//[conn setDelegateQueue:[[NSOperationQueue alloc] init]];
//[conn start];
//2.2 但是這樣設(shè)置就不行了
//[NSURLConnection connectionWithRequest:request delegate:self];
/*問題一:為什么买乃?
NSURLConnection 是臨時(shí)變量姻氨,當(dāng)運(yùn)行的時(shí)候被默認(rèn)添加到當(dāng)前線程的 RunLoop 中,由于主線程的RunLoop是默認(rèn)存在的剪验,所以可以運(yùn)行肴焊,這里不行能的原因就是當(dāng)前線程并沒有 RunLoop,如果想讓其運(yùn)行功戚,比需要?jiǎng)?chuàng)建RunLoop娶眷。
問題二:為什么2.1就可以?
因?yàn)閟tart方法:如果沒有一個(gè)runloop啸臀,它會(huì)自動(dòng)給當(dāng)前線程添加runLoop届宠,然后將connection加到runLoop中。
If you don’t schedule the connection in a run loop or an operation queue before calling this method, the connection is scheduled in the current run loop in the default mode.
*/
//2.2解決方式
NSRunLoop*loop = [NSRunLoop currentRunLoop];
[NSURLConnection connectionWithRequest:request delegate:self];
[loop run];
});
二乘粒、NSURLSession
- 推薦使用
- 簡單使用
- Get
- Get
//注意:如果需要改請求頭 需要使用這種方法
NSURL*url = [NSURL URLWithString:@"httpAddress"];
NSURLRequest*request = [NSURLRequest requestWithURL:url];
//1豌注、創(chuàng)建NSURLSession
NSURLSession*session = [NSURLSession sharedSession];
//2、利用NSURLSession創(chuàng)建Tash
NSURLSessionDataTask *task = [session dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
/*
data:服務(wù)器返回高i的數(shù)據(jù)
response:響應(yīng)頭
error:錯(cuò)誤信息
*/
NSLog(@"%@",[[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding]);
}];
//3灯萍、執(zhí)行Task
[task resume];
*
NSURL*url = [NSURL URLWithString:@"httpAddress"];
//1轧铁、創(chuàng)建NSURLSession
NSURLSession*session = [NSURLSession sharedSession];
//2、利用NSURLSession創(chuàng)建Tash
// 如果是通過url的方法創(chuàng)建Task竟稳,方法內(nèi)部會(huì)自動(dòng)根據(jù)URL創(chuàng)建一個(gè)request
// 如果是發(fā)送Get請求属桦,或者不需要設(shè)置請求頭信息熊痴,那么建議使用當(dāng)前方法發(fā)送請求
NSURLSessionDataTask*task = [session dataTaskWithURL:url completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
NSLog(@"%@",[[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding]);
}];
//3他爸、執(zhí)行Task
[task resume];
- POST
NSURL*url = [NSURL URLWithString:@"httpAddress"];
NSMutableURLRequest*request = [NSMutableURLRequest requestWithURL:url];
request.HTTPMethod = @"POST";
request.HTTPBody =@"需要發(fā)送的信息";
//1、創(chuàng)建NSURLSession
NSURLSession*session = [NSURLSession sharedSession];
//2果善、利用NSURLSession創(chuàng)建Tash
NSURLSessionDataTask*task = [session dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
NSLog(@"%@",[[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding]);
}];
//3诊笤、執(zhí)行Task
[task resume];
- 斷點(diǎn)下載
#import "ViewController.h"
#import "NSString+Mitchell.h"
@interface ViewController () <NSURLSessionDataDelegate>
@property (weak, nonatomic) IBOutlet UIProgressView *pro;
@property (weak, nonatomic) IBOutlet UIButton *startBtn;
@property (weak, nonatomic) IBOutlet UIButton *cancelBtn;
@property (nonatomic,strong) NSURLSession * session;
@property(nonatomic,assign)CGFloat totalLength;
@property(nonatomic,assign)CGFloat currentLength;
@property(nonatomic,strong)NSURLSessionDataTask*task;
@property(nonatomic,strong)NSOutputStream * stream;
@property(nonatomic,strong)NSString * path;
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
//初始化操作
//1、初始化文件路徑
self.path = [@"abc.mp4" cacheDir];
//2巾陕、初始化當(dāng)前下載進(jìn)度
self.currentLength = [self getFileSizeWithPath:self.path];
}
#pragma mark ------------------ delegate ------------------
//注意:NSURLSessionDataTask的代理方法中讨跟,默認(rèn)情況下是不接受服務(wù)器返回的數(shù)據(jù)的纪他,所以didCompleteWithError、didReceiveData默認(rèn)不會(huì)被調(diào)用
//如果想接受服務(wù)器返回的數(shù)據(jù)晾匠,必須手動(dòng)告訴系統(tǒng)茶袒,我們需要接受數(shù)據(jù)
- (void)URLSession:(NSURLSession *)session dataTask:(NSURLSessionDataTask *)dataTask didReceiveResponse:(NSURLResponse *)response completionHandler:(void (^)(NSURLSessionResponseDisposition))completionHandler{
NSLog(@"didReceiveResponse");
self.totalLength = response.expectedContentLength;
//告訴服務(wù)器接受,才能調(diào)用didCompleteWithError凉馆、didReceiveData兩個(gè)方法
NSString*path = [@"abc.mp4" cacheDir];
NSLog(@"%@",path);
_stream = [NSOutputStream outputStreamToFileAtPath:path append:YES];
[_stream open];
completionHandler(NSURLSessionResponseAllow);
}
-(void)URLSession:(NSURLSession *)session dataTask:(NSURLSessionDataTask *)dataTask didReceiveData:(NSData *)data{
self.currentLength +=data.length;
self.pro.progress = 1.0*_currentLength/_totalLength;
[_stream write:data.bytes maxLength:data.length];
NSLog(@"didReceiveData");
}
-(void)URLSession:(NSURLSession *)session task:(NSURLSessionTask *)task didCompleteWithError:(NSError *)error{
NSLog(@"didCompleteWithError");
[_stream close];
_stream = nil;
}
- (NSURLSession *)session{
if (!_session) {
//1薪寓、創(chuàng)建NSURLSession
_session = [NSURLSession sessionWithConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration] delegate:self delegateQueue:[NSOperationQueue mainQueue]];
}
return _session;
}
- (NSURLSessionDataTask *)task{
if (!_task) {
//圖片:http://img1.imgtn.bdimg.com/it/u=298400068,822827541&fm=21&gp=0.jpg%2F2008-09-08%2F200898163242920_2.jpg&bdtype=0&fr=ala&ala=1&alatpl=others&pos=1
//MP4:http://mvvideo1.meitudata.com/55d99e5939342913.mp4
NSURL*url = [NSURL URLWithString:@"http://mvvideo1.meitudata.com/55d99e5939342913.mp4"];
NSMutableURLRequest*request = [NSMutableURLRequest requestWithURL:url];
NSString*range = [NSString stringWithFormat:@"bytes:%zd-",[self getFileSizeWithPath:self.path]];
[request setValue:range forHTTPHeaderField:@"Range"];
//2、利用NSURLSession創(chuàng)建Tash
_task = [self.session dataTaskWithURL:url];
}
return _task;
}
- (NSUInteger)getFileSizeWithPath:(NSString*)path{
NSUInteger currentSize = [[[NSFileManager defaultManager]attributesOfItemAtPath:path error:nil][NSFileSize] integerValue];
return currentSize;
}
#pragma mark ------------------ 開始 ------------------
- (IBAction)start:(id)sender {
//3澜共、執(zhí)行Task
[self.task resume];
}
#pragma mark ------------------ 暫停 ------------------
- (IBAction)pause:(id)sender {
NSLog(@"暫停");
[self.task suspend];
}
#pragma mark ------------------ 繼續(xù) ------------------
- (IBAction)resume:(id)sender {
NSLog(@"繼續(xù)");
[self.task resume];
}
#pragma mark ------------------ 取消 ------------------
- (IBAction)cancel:(id)sender {
}
@end
- 下載進(jìn)度
#import "ViewController.h"
#import "NSString+Mitchell.h"
@interface ViewController ()<NSURLSessionDownloadDelegate>
@property (weak, nonatomic ) IBOutlet UIProgressView *pro;
@property (weak, nonatomic ) IBOutlet UIButton *startBtn;
@property (weak, nonatomic ) IBOutlet UIButton *cancelBtn;
@property (nonatomic,strong) NSURLSessionDownloadTask * task;
@property (nonatomic,strong) NSData * resumeData;
@property (nonatomic,strong) NSURLSession * session;
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
}
#pragma mark ------------------ didFinishDownloadingToURL ------------------
//下載完成時(shí)調(diào)用
- (void)URLSession:(NSURLSession *)session downloadTask:(NSURLSessionDownloadTask *)downloadTask
didFinishDownloadingToURL:(NSURL *)location{
NSString*toPath = [@"abc.mp4" cacheDir];
NSURL*toUrl = [NSURL fileURLWithPath:toPath];
NSFileManager *manager = [NSFileManager defaultManager];
[manager moveItemAtURL:location toURL:toUrl error:nil];
NSLog(@"%@",toUrl);
NSLog(@"didFinishDownloadingToURL");
_startBtn.userInteractionEnabled = YES;
}
#pragma mark ------------------ didWriteData ------------------
//接收服務(wù)器返回的數(shù)據(jù)時(shí)調(diào)用
- (void)URLSession:(NSURLSession *)session downloadTask:(NSURLSessionDownloadTask *)downloadTask
didWriteData:(int64_t)bytesWritten
totalBytesWritten:(int64_t)totalBytesWritten
totalBytesExpectedToWrite:(int64_t)totalBytesExpectedToWrite{
//bytesWritten:每次接收了多少
//totalBytesWritten:本地寫入了多少
//totalBytesExpectedToWrite:一共多少
NSLog(@"%zd,%zd,%zd",bytesWritten,totalBytesWritten,totalBytesExpectedToWrite);
self.pro.progress = 1.0* totalBytesWritten/totalBytesExpectedToWrite;
}
#pragma mark ------------------ didResumeAtOffset ------------------
//恢復(fù)下載時(shí)候調(diào)用(使用resumeData恢復(fù)下載的時(shí)候才能調(diào)用)
- (void)URLSession:(NSURLSession *)session downloadTask:(NSURLSessionDownloadTask *)downloadTask
didResumeAtOffset:(int64_t)fileOffset
expectedTotalBytes:(int64_t)expectedTotalBytes{
NSLog(@"didResumeAtOffset");
}
//下載完成時(shí)調(diào)用
//如果下載時(shí)候error有值向叉,代表著下載出錯(cuò)
-(void)URLSession:(NSURLSession *)session task:(NSURLSessionTask *)task didCompleteWithError:(NSError *)error{
NSLog(@"didCompleteWithError");
_startBtn.userInteractionEnabled = YES;
}
#pragma mark ------------------ 開始 ------------------
- (IBAction)start:(id)sender {
//圖片:http://img1.imgtn.bdimg.com/it/u=298400068,822827541&fm=21&gp=0.jpg%2F2008-09-08%2F200898163242920_2.jpg&bdtype=0&fr=ala&ala=1&alatpl=others&pos=1
//MP4:http://mvvideo1.meitudata.com/55d99e5939342913.mp4
NSURL*url = [NSURL URLWithString:@"http://mvvideo1.meitudata.com/55d99e5939342913.mp4"];
NSURLRequest*request = [NSURLRequest requestWithURL:url];
//1、創(chuàng)建NSURLSession
/*
第一個(gè)參數(shù):Session的配置信息
第二個(gè)參數(shù):代理
第三個(gè)參數(shù):規(guī)定了代理方法在哪個(gè)線程中執(zhí)行
*/
_session = [NSURLSession sessionWithConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration] delegate:self delegateQueue:[NSOperationQueue mainQueue]];
//2嗦董、利用NSURLSession創(chuàng)建Task
_task = [self.session downloadTaskWithRequest:request];
//3母谎、執(zhí)行Task
[_task resume];
_startBtn.userInteractionEnabled = NO;
}
#pragma mark ------------------ 暫停 ------------------
- (IBAction)pause:(id)sender {
NSLog(@"暫停");
[_task suspend];
}
#pragma mark ------------------ 繼續(xù) ------------------
- (IBAction)resume:(id)sender {
NSLog(@"繼續(xù)");
// [_task resume];
//恢復(fù)信息恢復(fù)下載,用獲取到resumeData繼續(xù)下載
self.task = [_session downloadTaskWithResumeData:_resumeData];
[self.task resume];
}
#pragma mark ------------------ 取消 ------------------
- (IBAction)cancel:(id)sender {
//取消
//注意點(diǎn):一旦取消京革,就不能恢復(fù)了
// [_task cancel];
//如果是調(diào)用了cancelByProducingResumeData方法奇唤,方法內(nèi)部會(huì)回調(diào)一個(gè)block,在block中會(huì)將resumeData傳遞給我們
//resumeData中就保存了當(dāng)前下載任務(wù)的配置信息(下載到什么地方存崖,從什么地方恢復(fù)等等)
[self.task cancelByProducingResumeData:^(NSData *resumeData) {
self.resumeData = resumeData;
}];
}
@end
- 上傳
#import "ViewController.h"
// 請求頭的
#define MitchellHeaderBoundary @"----xiaomage"
// 請求體的
#define MitchellBoundary [@"------xiaomage" dataUsingEncoding:NSUTF8StringEncoding]
// 結(jié)束符
#define MitchellEndBoundary [@"------xiaomage--" dataUsingEncoding:NSUTF8StringEncoding]
// 將字符串轉(zhuǎn)換為二進(jìn)制
#define MitchellEncode(str) [str dataUsingEncoding:NSUTF8StringEncoding]
// 換行
#define MitchellNewLine [@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]
@interface ViewController ()<NSURLSessionTaskDelegate>
@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{
NSURL*url = [NSURL URLWithString:@""];
NSMutableURLRequest*request = [NSMutableURLRequest requestWithURL:url];
//1冻记、創(chuàng)建Session
NSURLSession*session = [NSURLSession sessionWithConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration] delegate:self delegateQueue:[NSOperationQueue mainQueue]];
//2、根據(jù)Seesion創(chuàng)建Task
/*
//注意:fromFile方法是用于PUT請求上傳文件的
//而我們的服務(wù)器只支持POST請求上傳文件
NSURL*fileUrl = [NSURL fileURLWithPath:@""];
NSURLSessionUploadTask*task = [session uploadTaskWithRequest:request fromFile:fileUrl completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
}];
*/
/*請求體
第一個(gè)參數(shù):需要請求的地址/請求頭/
第二個(gè)參數(shù):需要上傳拼接之后的二進(jìn)制數(shù)據(jù)
*/
request.HTTPMethod = @"POST";
// NSURL*fileUrl = [NSURL fileURLWithPath:@""];
// NSData*data =[NSData dataWithContentsOfURL:fileUrl];
// 2.2設(shè)置請求體
NSMutableData *data = [NSMutableData data];
// 2.2.1設(shè)置文件參數(shù)
[data appendData:MitchellBoundary];
[data appendData:MitchellNewLine];
// name : 對應(yīng)服務(wù)端接收的字段類型(服務(wù)端參數(shù)的名稱)
// filename: 告訴服務(wù)端當(dāng)前的文件的文件名稱(也就是告訴服務(wù)器用什么名稱保存當(dāng)前上傳的文件)
[data appendData:[@"Content-Disposition: form-data; name=\"file\"; filename=\"videos.plist\"" dataUsingEncoding:NSUTF8StringEncoding]];
[data appendData:MitchellNewLine];
[data appendData:[@"Content-Type: application/octet-stream" dataUsingEncoding:NSUTF8StringEncoding]];
[data appendData:MitchellNewLine];
[data appendData:MitchellNewLine];
//上傳文件的數(shù)據(jù)
NSURL*fileUrl = [NSURL fileURLWithPath:@""];
NSData*imgData = [NSData dataWithContentsOfURL:fileUrl];
[data appendData:imgData];
[data appendData:MitchellNewLine];
[data appendData:MitchellNewLine];
// 2.2.2設(shè)置非文件參數(shù)
[data appendData:MitchellBoundary];
[data appendData:MitchellNewLine];
// name : 對應(yīng)服務(wù)端接收的字段類型(服務(wù)端參數(shù)的名稱)
[data appendData:[@"Content-Disposition: form-data; name=\"username\"" dataUsingEncoding:NSUTF8StringEncoding]];
[data appendData:MitchellNewLine];
[data appendData:MitchellNewLine];
[data appendData:[@"Mitchell" dataUsingEncoding:NSUTF8StringEncoding]];
[data appendData:MitchellNewLine];
// 2.2.3設(shè)置結(jié)束符號
[data appendData:MitchellEndBoundary];
//注意點(diǎn):如果利用NSURLSessionUploadTask上傳文件来惧,那么請求體必須卸載fromData參數(shù)中冗栗,不能設(shè)置在request中
//如果設(shè)置在request中會(huì)被忽略
//
request.HTTPBody = data;
NSURLSessionUploadTask*task = [session uploadTaskWithRequest:request fromData:data completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
}];
//3、執(zhí)行Task
[task resume];
}
#pragma mark ------------------ Delegate ------------------
//上傳過程中調(diào)用
//bytesSent:當(dāng)前這一次上傳的數(shù)據(jù)大小
//totalBytesSent:總共已經(jīng)上傳的數(shù)據(jù)大小
//totalBytesExpectedToSend:需要上傳文件的大小
-(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);
}
//請求完畢時(shí)調(diào)用
-(void)URLSession:(NSURLSession *)session task:(NSURLSessionTask *)task didCompleteWithError:(NSError *)error{
//用block方式 創(chuàng)建是不會(huì)調(diào)用這個(gè)方法
}
@end