#import "XNUploadFile.h"  #define kTimeOut 5.0f  @implementation XNUploadFile /** 分隔字符串 */ static NSString *boundaryStr = @"--"; /** 本次上傳標示字符串 */ static NSString *randomIDStr; /** 上傳(php)腳本中，接收文件字段 */ static NSString *uploadID;  - (instancetype)init {  self = [super init];  if (self) {  /** 本次上傳標示字符串 */  randomIDStr = @"itcastupload";  /** 上傳(php)腳本中，接收文件字段 */  // 可以咨詢公司的網站開發程序員  // 或者用FireBug自己跟蹤調試  uploadID = @"uploadFile";  }  return self; }  #pragma mark - 成員方法. 用NSURLSession來完成上傳 - (void)uploadFile:(NSString *)path fileName:(NSString *)fileName completion:(void (^)(NSString *string))completion {  // 1. url 提示：真正負責文件上傳的是php文件，而不是html文件  NSURL *url = [NSURL URLWithString:@"http://localhost/new/post/upload.php"];   // 2. request  NSURLRequest *request = [self requestForUploadURL:url uploadFileName:fileName localFilePath:path];   // 3. session（回話）  // 全局網絡回話，為了方便程序員使用網絡服務  NSURLSession *session = [NSURLSession sharedSession];   // 4. 數據任務-> 任務都是由回話發起的  /** URLSession的任務，默認都是在其他線程工作的，默認都是異步的 */  [[session dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {    id result = [NSJSONSerialization JSONObjectWithData:data options:0 error:NULL];    NSLog(@"%@ %@", result, [NSThread currentThread]);    dispatch_async(dispatch_get_main_queue(), ^{   if (completion) {   completion(@"下載完成");   }  });  }] resume];   // NSURLSessionDataTask *task = [session dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {  //  // id result = [NSJSONSerialization JSONObjectWithData:data options:0 error:NULL];  //  // NSLog(@"%@ %@", result, [NSThread currentThread]);  //  // dispatch_async(dispatch_get_main_queue(), ^{  //  if (completion) {  //  completion(@"下載完成");  //  }  // });  // }];  //  // // 5. 啟動任務  // [task resume]; }  #pragma mark - 私有方法 ： 拼字符串 /** 拼接頂部字符串 */ - (NSString *)topStringWithMimeType:(NSString *)mimeType uploadFile:(NSString *)uploadFile {  NSMutableString *strM = [NSMutableString string];   [strM appendFormat:@"%@%@/n", boundaryStr, randomIDStr];  [strM appendFormat:@"Content-Disposition: form-data; name=/"%@/"; filename=/"%@/"/n", uploadID, uploadFile];  [strM appendFormat:@"Content-Type: %@/n/n", mimeType];   NSLog(@"頂部字符串：%@", strM);  return [strM copy]; }  /** 拼接底部字符串 */ - (NSString *)bottomString {  NSMutableString *strM = [NSMutableString string];   [strM appendFormat:@"%@%@/n", boundaryStr, randomIDStr];  [strM appendString:@"Content-Disposition: form-data; name=/"submit/"/n/n"];  [strM appendString:@"Submit/n"];  [strM appendFormat:@"%@%@--/n", boundaryStr, randomIDStr];   NSLog(@"底部字符串：%@", strM);  return [strM copy]; }  /** 指定全路徑文件的mimeType */ - (NSString *)mimeTypeWithFilePath:(NSString *)filePath {  // 1. 判斷文件是否存在  if (![[NSFileManager defaultManager] fileExistsAtPath:filePath]) {  return nil;  }   // 2. 使用HTTP HEAD方法獲取上傳文件信息  NSURL *url = [NSURL fileURLWithPath:filePath];  NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];   // 3. 調用同步方法獲取文件的MimeType  NSURLResponse *response = nil;  [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:NULL];   return response.MIMEType; }  /** 上傳文件網絡請求 */ - (NSURLRequest *)requestForUploadURL:(NSURL *)url uploadFileName:(NSString *)fileName localFilePath:(NSString *)filePath {  // 0. 獲取上傳文件的mimeType  NSString *mimeType = [self mimeTypeWithFilePath:filePath];  if (!mimeType) return nil;   // 1. 拼接要上傳的數據體  NSMutableData *dataM = [NSMutableData data];  [dataM appendData:[[self topStringWithMimeType:mimeType uploadFile:fileName] dataUsingEncoding:NSUTF8StringEncoding]];  // 拼接上傳文件本身的二進制數據  [dataM appendData:[NSData dataWithContentsOfFile:filePath]];  [dataM appendData:[[self bottomString] dataUsingEncoding:NSUTF8StringEncoding]];   // 2. 設置請求  NSMutableURLRequest *requestM = [NSMutableURLRequest requestWithURL:url cachePolicy:0 timeoutInterval:kTimeOut];  // 1> 設定HTTP請求方式  requestM.HTTPMethod = @"POST";  // 2> 設置數據體  requestM.HTTPBody = dataM;  // 3> 指定Content-Type  NSString *typeStr = [NSString stringWithFormat:@"multipart/form-data; boundary=%@", randomIDStr];  [requestM setValue:typeStr forHTTPHeaderField:@"Content-Type"];  // 4> 指定數據長度  NSString *lengthStr = [NSString stringWithFormat:@"%@", @([dataM length])];  [requestM setValue:lengthStr forHTTPHeaderField:@"Content-Length"];   return [requestM copy]; } 

- (void)putFile {  // 1. url 最后一個是要上傳的文件名  NSURL *url = [NSURL URLWithString:@"http://localhost/uploads/abcd"]; //abcd為文件名   // 2. request  NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];  request.HTTPMethod = @"PUT"; // request.HTTPMethod = @"DELETE";   // 設置用戶授權  // BASE64編碼：一種對字符串和二進制數據進行編碼的一種“最常用的網絡編碼方式”，此編碼可以將二進制數據轉換成字符串！  // 是很多加密算法的底層算法  // BASE64支持反編碼，是一種雙向的編碼方案  NSString *authStr = @"admin:123";  NSString *authBase64 = [NSString stringWithFormat:@"Basic %@", [self base64Encode:authStr]];  [request setValue:authBase64 forHTTPHeaderField:@"Authorization"];   // 3. URLSession  NSURLSession *session = [NSURLSession sharedSession];   // 4. 由session發起任務  NSURL *localURL = [[NSBundle mainBundle] URLForResource:@"001.png" withExtension:nil];  [[session uploadTaskWithRequest:request fromFile:localURL completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {    NSString *result = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];    NSLog(@"sesult---> %@ %@", result, [NSThread currentThread]);  }] resume]; }  - (NSString *)base64Encode:(NSString *)str {  // 1. 將字符串轉換成二進制數據  NSData *data = [str dataUsingEncoding:NSUTF8StringEncoding];   // 2. 對二進制數據進行base64編碼  NSString *result = [data base64EncodedStringWithOptions:0];   NSLog(@"base464--> %@", result);   return result; }