IOS上传图片到服务器

-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info{

    NSLog(@"选择了图片:%@",[info objectForKey:UIImagePickerControllerEditedImage]);
    NSLog(@"dictionary:%@",info);

    [self.picShow setImage:[info objectForKey:UIImagePickerControllerEditedImage] forState:UIControlStateNormal];

    NSString *path=@"http://www.12311148.com";
    AFHTTPRequestOperationManager *manager=[AFHTTPRequestOperationManager manager];

    manager.responseSerializer=[AFHTTPResponseSerializer serializer];

    [manager POST:path parameters:@{@"user":@"15"} constructingBodyWithBlock:^(id formData){

        UIImage *image=[info objectForKey:UIImagePickerControllerEditedImage];
        NSData *data=UIImagePNGRepresentation(image);

        [formData appendPartWithFileData:data name:@"file" fileName:@"1.png" mimeType:@"image.jpg"];

    }success:^(AFHTTPRequestOperation *operation,id responseObject){
        NSString *str=[[NSString alloc]initWithData:responseObject encoding:NSUTF8StringEncoding];
        NSLog(@"%@",str);
    }failure:^(AFHTTPRequestOperation *operation,NSError *error){
        NSLog(@"%@",error.description);
    }];

    [picker dismissViewControllerAnimated:YES completion:nil];

}