ios - 使用 Post 方法为 NSURLConnection 设置进度条

Question

我正在尝试为 post 方法设置 nsurlconection 的进度条，请查看设置进度条的代码和指南，我正在尝试本网站提供的所有可能方法。

    -(void)getCustomerDetails:(NSMutableDictionary *)tempDir
{
    self.downloadedMutableData = [[NSMutableData alloc] init];

    NSURL *url = [NSURL URLWithString:[CommonFunctions getPListFileValue:@"wsgetcustomers"]];

    NSError *error = nil;
    [tempDir setObject:[self md5:[CommonFunctions getPListFileValue:@"udid"]] forKey:@"encryptedvenderid"];
    [tempDir setObject:[CommonFunctions getPListFileValue:@"username"] forKey:@"username"];
    [tempDir setObject:[CommonFunctions getPListFileValue:@"password"] forKey:@"password"];
    [tempDir setObject:[CommonFunctions getPListFileValue:@"version"] forKey:@"version"];

    NSData *postData = [NSJSONSerialization dataWithJSONObject:tempDir
                                                       options:kNilOptions
                                                         error:&error];

    // Create the request
    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url cachePolicy:NSURLRequestReloadIgnoringLocalCacheData timeoutInterval:60.0];
    [request setHTTPMethod:@"POST"];
    [request setValue:@"application/json" forHTTPHeaderField:@"Accept"];
    [request setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
    [request setValue:@"json" forHTTPHeaderField:@"Data-Type"];
    [request setValue:@"no-cache" forHTTPHeaderField:@"cache-control"];
    [request setValue:[NSString stringWithFormat:@"%lu", (unsigned long)[postData length]]  forHTTPHeaderField:@"Content-Length"];
    [request setHTTPBody:postData];

    self.connectionManager = [[NSURLConnection alloc] initWithRequest:request
                                                                  delegate:self];
}
-(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
    NSLog(@"%lld", response.expectedContentLength);
    self.urlResponse = response;
}
-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
    [self.downloadedMutableData appendData:data];

    self.progressBar.progress = ((100.0/self.urlResponse.expectedContentLength)*self.downloadedMutableData.length)/100;

    NSLog(@"%.0f%%", ((100.0/self.urlResponse.expectedContentLength)*self.downloadedMutableData.length));
}
- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
    self.progressBar.hidden = YES;

    NSLog(@"Succeeded! Received %lu bytes of data", (unsigned long)[self.downloadedMutableData length]);

    NSDictionary *Response = [[[NSString alloc]initWithData:self.downloadedMutableData encoding:NSUTF8StringEncoding] JSONValue];
    NSDictionary *FinalDict = [[NSString stringWithFormat:@"%@",[Response objectForKey:@"d"]] JSONValue];

    NSLog(@"%@",FinalDict);

}

在这段代码中，在getCustomerDetails中，并没有计算在diredecievedata方法中获取的数据，而是直接导航到didfinish方法。

请帮我在我的项目中添加进度条。

Answer 1

试试这个方法

 - (void)connection:(NSURLConnection *)connection  didSendBodyData:(NSInteger)bytesWritten totalBytesWritten:(NSInteger)totalBytesWritten totalBytesExpectedToWrite:(NSInteger)totalBytesExpectedToWrite
    {
     float prog = (totalBytesWritten / (totalBytesExpectedToWrite * 1.0f) * 100);
     [self.progBar setProgress:prog];

    }

为了数据的进步