Question

我想通知我的用户有关上传某些Mpeg 3文件的进度。只有一个。但正如我在标题中所说的那样，我遇到了问题。

我的上传代码在这里

- (NSString *) upload: (NSData*) postData {

    NSString *str;
    NSURL *url = [NSURL URLWithString:@"http://example.com/test.php"];



    NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL:url cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:60.0];
    request.HTTPMethod = @"POST";


    NSString *boundary = @"unique-consistent-string";
    // set Content-Type in HTTP header
    NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@", boundary];
    [request setValue:contentType forHTTPHeaderField: @"Content-Type"];


    // post body
    NSMutableData *body = [NSMutableData data];

    // add params (all params are strings)
    [body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];

    // add mp3 data
    if (postData) {

        [body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
        [body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=%@; filename=audio\r\n", @"audioFormKey"] dataUsingEncoding:NSUTF8StringEncoding]];
        [body appendData:[@"Content-Type: audio/mpeg3\r\n\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
        [body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];

        [body appendData:postData];
        [body appendData:[[NSString stringWithFormat:@"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
    }

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

    // setting the body of the post to the reqeust
    [request setHTTPBody:body];

    // set the content-length
    NSString *postLength2 = [NSString stringWithFormat:@"%lu", (unsigned long)[body length]];
    [request setValue:postLength2 forHTTPHeaderField:@"Content-Length"];

    NSLog(postLength2);



    [NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue currentQueue] completionHandler:^(NSURLResponse *response, NSData *data, NSError *error) {

        if(data.length > 0)
        {
            NSError *error;
            NSURLResponse *response;
            NSData *urlData=[NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];
            NSString *str=[[NSString alloc]initWithData:urlData encoding:NSUTF8StringEncoding];

            NSLog(str);
        }
    }];
    return str;
}
- (void)connection:(NSURLConnection *)connection didSendBodyData:(NSInteger)bytesWritten totalBytesWritten:(NSInteger)totalBytesWritten totalBytesExpectedToWrite:(NSInteger)totalBytesExpectedToWrite {

    NSLog(@"bytes transfer %li" ,(long)bytesWritten);

}

这里永远不会调用Log“bytes transfer”。

非常感谢您的支持

Answer 1

在完成处理程序中调用sendAsynchronousRequest:然后调用sendSynchronousRequest:有点奇怪吗？

在任何情况下，您都没有将URL连接配置为具有委托，因此永远不会调用您的委托方法。

您需要分配并实例化URLConnection，然后将其配置为使用您的对象作为委托。它需要符合NSURLConnectionDelegate协议。

- connection：didSendBodyData：totalBytesWritten：totalBytesExpectedToWrite：never call

1 个答案: