NSURLSession總結(jié)?

文件上傳方法中body處需要填寫request的請求體

#define XMGBoundary @"520it"
#define XMGEncode(string) [string dataUsingEncoding:NSUTF8StringEncoding]
#define XMGNewLine [@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]
#import "ViewController.h"
@interface ViewController ()
/** session */
@property (nonatomic, strong) NSURLSession *session;
@end
@implementation ViewController
- (NSURLSession *)session
{
? ? if (!_session) {
? ? NSURLSessionConfiguration *cfg = [NSURLSessionConfiguration defaultSessionConfiguration];
? ? cfg.timeoutIntervalForRequest = 10;
?  // 是否允許使用蜂窩網(wǎng)絡（手機自帶網(wǎng)絡）
?  cfg.allowsCellularAccess = YES;
?  _session = [NSURLSession sessionWithConfiguration:cfg];
?  }? 
?  return _session;
}
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
? ? NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:@"http://120.25.226.186:32812/upload"]];
? ? request.HTTPMethod = @"POST";
? ? // 設置請求頭(告訴服務器,這是一個文件上傳的請求)
? ? [request setValue:[NSString stringWithFormat:@"multipart/form-data; boundary=%@", XMGBoundary]forHTTPHeaderField:@"Content-Type"];
? ? // 設置請求體
? ? NSMutableData *body = [NSMutableData data];
? ? // 文件參數(shù)
? ? // 分割線
? ? [body appendData:XMGEncode(@"--")];
? ? [body appendData:XMGEncode(XMGBoundary)];
? ? [body appendData:XMGNewLine];
? ? // 文件參數(shù)名
? ? [body appendData:XMGEncode([NSString stringWithFormat:@"Content-Disposition: form-data; name=\"file\";filename=\"test.png\""])];
? ? [body appendData:XMGNewLine];
? ? // 文件的類型
? ? [body appendData:XMGEncode([NSString stringWithFormat:@"Content-Type: image/png"])];
? ? [body appendData:XMGNewLine];
? ? // 文件數(shù)據(jù)
? ?  [body appendData:XMGNewLine];
? ?  [body appendData:[NSData dataWithContentsOfFile:@"/Users/xiaomage/Desktop/test.png"]];
? ?  [body appendData:XMGNewLine];
? ? // 結(jié)束標記
? ? /*
? ? --分割線--\r\n
? ? */
? ? [body appendData:XMGEncode(@"--")];
? ? [body appendData:XMGEncode(XMGBoundary)];
? ? [body appendData:XMGEncode(@"--")];
? ? [body appendData:XMGNewLine];
? ?  [[self.session uploadTaskWithRequest:request fromData:body completionHandler:^(NSData *data, NSURLResponse *response, NSError *error)
? ? ? ? {
? ? ? ? ?  NSLog(@"-------%@", [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:nil]);
? ? ? ? ?  }] resume];
}
@end