iOS开发中文件的上传和下载功能的基本实现

//    UIImage *image = [UIImage imageNamed:@"test"];
//    NSData *filedata = UIImagePNGRepresentation(image);
//    [self upload:@"file" filename:@"test.png" mimeType:@"image/png" data:filedata parmas:@{@"username" : @"123"}];
    
    // 给本地文件发送一个请求
    NSURL *fileurl = [[NSBundle mainBundle] URLForResource:@"itcast.txt" withExtension:nil];
    NSURLRequest *request = [NSURLRequest requestWithURL:fileurl];
    NSURLResponse *repsonse = nil;
    NSData *data = [NSURLConnection sendSynchronousRequest:request returningResponse:&repsonse error:nil];
    
    // 得到mimeType
    NSLog(@"%@", repsonse.MIMEType);
    [self upload:@"file" filename:@"itcast.txt" mimeType:repsonse.MIMEType data:data parmas:@{
                                                                                              @"username" : @"999",
                                                                                              @"type" : @"XML"}];
}

@end

补充说明：

 

文件上传请求数据格式

部分文件的MIMEType