ios - 使用xcode将图像从数据库上传到网络服务

Question

我想将图片从手机上传到网络服务，我的链接如下所示 “http://sample.com/upload_image.php” 我的代码如下:

-(IBAction) post:(id) sender
{
    count = 0;
    self.progress = [[UIProgressView alloc] initWithProgressViewStyle:UIProgressViewStyleDefault];

    self.progress.center = self.view.center; 
    progress.hidden = NO;
    [self.view addSubview:self.progress];
    nmyTimer = [NSTimer scheduledTimerWithTimeInterval:1 target:self selector:@selector(updateUI:) userInfo:nil repeats:YES];
    NSString *filename = [NSString alloc];
    filename = [self randomStringWithLength:5];
    NSData *imageData = UIImageJPEGRepresentation(imageView.image, 100);
    NSError *error;
    NSData *searchData;
    NSHTTPURLResponse *response;

    // setting up the URL to post to
    NSString *urlString = @"http://dev9.edisbest.com/upload_image.php";

    // setting up the request object now

    NSMutableURLRequest *request = [[[NSMutableURLRequest alloc] init] autorelease];
    [request setURL:[NSURL URLWithString:urlString]];
    [request setHTTPMethod:@"POST"];

    /*
     add some header info now
     we always need a boundary when we post a file
     also we need to set the content type

     You might want to generate a random boundary.. this is just the same 
     as my output from wireshark on a valid html post
     */
    NSString *boundary = [NSString stringWithString:@"---------------------------14737809831466499882746641449"];
    NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@",boundary];
    [request addValue:contentType forHTTPHeaderField: @"Content-Type"];

    /*
     now lets create the body of the post
     */

    NSMutableData *body = [NSMutableData data];
    [body appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];    

    [body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"userfile\"; filename=\"%@.jpg\"\r\n",filename] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[[NSString stringWithString:@"Content-Type: application/octet-stream\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[NSData dataWithData:imageData]];
    [body appendData:[[NSString stringWithFormat:@"\r\n--%@--\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
    // setting the body of the post to the reqeust
    searchData = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];
    NSLog(@"%@",response);
    NSString *imageName;
    imageName = [[NSString alloc] initWithData:searchData encoding:NSUTF8StringEncoding];

    NSLog(@"retrun Result of Upload Photo.. %@",imageName);

    [request setHTTPBody:body];

    // now lets make the connection to the web

    [NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue]                            completionHandler:^(NSURLResponse *response, NSData *data, NSError *error) 
    {                                NSLog(@"Finished with status code: %i", [(NSHTTPURLResponse *)response statusCode]);  }];

    NSData *returnData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
    ///self.returnString = [[NSString alloc] initWithData:returnData encoding:NSUTF8StringEncoding];
    NSString *returnString = [[NSString alloc] initWithData:returnData encoding:NSUTF8StringEncoding];
    NSLog(@"%@",returnString);

   }

当我构建和运行时，我会被要求选择图像，当我选择要上传的图像时

我收到如下消息

**[Switching to process 553 thread 0x4e03]
2015-04-28 12:08:12.856 image-video-upload[553:207] (null)
2015-04-28 12:08:12.857 image-video-upload[553:207] retrun Result of Upload Photo.. 
2015-04-28 12:08:12.889 image-video-upload[553:207] Finished with status code: 0**

上面的消息显示在我的控制台中并崩溃了

Answer 1

试试这个..

UIImage *image=[UIImage imageNamed:@"i3.png"];
NSData *imageData = UIImageJPEGRepresentation(image, 1.0);


NSString *encodedString = [imageData base64EncodedStringWithOptions:0];

NSMutableDictionary *dictionnary = [NSMutableDictionary dictionary];
[dictionnary setObject:encodedString forKey:@"imageData"];


NSError *error = nil;
NSData *jsonData = [NSJSONSerialization dataWithJSONObject:dictionnary
                                                   options:kNilOptions
                                                     error:&error];

NSString *urlString = @"http://Your url";
NSURL *url = [NSURL URLWithString:urlString];

// Prepare the request
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
[request setHTTPMethod:@"POST"];
[request setValue:@"application/json" forHTTPHeaderField:@"Accept"];
[request setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
[request setValue:@"json" forHTTPHeaderField:@"Data-Type"];
[request setValue:[NSString stringWithFormat:@"%lu", (unsigned long)[jsonData length]]  forHTTPHeaderField:@"Content-Length"];
[request setHTTPBody:jsonData];

NSError *errorReturned = nil;
NSURLResponse *theResponse =[[NSURLResponse alloc]init];
NSData *data = [NSURLConnection sendSynchronousRequest:request
                                     returningResponse:&theResponse
                                                 error:&errorReturned];