http上传图片

服务器提供的信息

Content-Disposition: form-data; name="image_file"; filename="pic.jpg"

  AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];    manager.responseSerializer.acceptableContentTypes = [NSSet setWithObjects:@"text/html",@"image/png",@"image/jpg",nil];    //NSURL *filePath = [NSURL URLWithString:[NSString stringWithFormat:@"file://%@",fullPath]];        [manager POST:@"http://api.0579.com/up/upload.php" parameters:nil constructingBodyWithBlock:^(id formData) {        NSString *path=[[NSBundle mainBundle] pathForResource:@"3" ofType:@"png"];                          UIImage *image=[UIImage imageNamed:@"3.png"];        NSData *data=[NSData dataWithContentsOfURL:imageURL];                data=UIImagePNGRepresentation(image);                                [formData appendPartWithFileData:data name:@"image_file"                                fileName:@"3.png" mimeType:@"image/png"];                    } success:^(AFHTTPRequestOperation *operation, id responseObject) {        NSLog(@"respon%@",responseObject);                    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {        NSLog(@"error%@",error);            }];