Question

您好我是ios post方法的新手。在我的应用程序中，我想显示值列表。请求格式为：

{"customerId":"000536","requestHeader":{"userId":"000536"}}

我使用的代码是：

NSOperationQueue *queue = [[NSOperationQueue alloc] init];
    NSString *post =[[NSString alloc] initWithFormat:@"customerId=%@&userId=%@",@"000536",@"000536"];
    NSLog(@"PostData: %@",post);

    NSURL *url=[NSURL URLWithString:@"https://servelet/URL"];
    NSDictionary *jsonDict = [[NSDictionary alloc] initWithObjectsAndKeys:
                              @"000536", @"customerId",
                              @"000536", @"userId",
                              nil];

    NSError *error;
    NSData *postData = [NSJSONSerialization dataWithJSONObject:jsonDict options:0 error:&error];

    NSString *postLength = [NSString stringWithFormat:@"%lu", (unsigned long)[postData length]];

    NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
    [request setURL:url];
    [request setHTTPMethod:@"POST"];
    [request setValue:postLength forHTTPHeaderField:@"Content-Length"];
    [request setValue:@"application/json" forHTTPHeaderField:@"Accept"];
    [request setValue:@"application/json; character=utf-8" forHTTPHeaderField:@"Content-Type"];
    [request setHTTPBody:postData];

    //[NSURLRequest setAllowsAnyHTTPSCertificate:YES forHost:[url host]];
    [NSURLConnection sendAsynchronousRequest:request queue:queue completionHandler:^(NSURLResponse *response,NSData *data, NSError *error){
        // NSLog(@"Response code: %ld", (long)[response statusCode]);
        if(error || !data){
            NSLog(@"Server Error : %@", error);
        }
        else
        {
            NSLog(@"Server Response :%@",response);
            NSError* error;
            NSDictionary* json = [NSJSONSerialization
                                  JSONObjectWithData:data
                                  options:kNilOptions
                                  error:&error];

            NSArray* latest = [json objectForKey:@"apptModel"];
            NSLog(@"items: %@", latest);
        }
    }
     ];

回复是：（null）

如何使用上面显示的相同格式请求值？提前感谢。

Answer 1

使用此代码

NSOperationQueue *queue = [[NSOperationQueue alloc] init];
NSString *post =[[NSString alloc] initWithFormat:@"customerId=%@&userId=%@",@"000536",@"000536"];
NSLog(@"PostData: %@",post);

NSURL *url=[NSURL URLWithString:@"https://servelet/URL"];
NSDictionary *jsonDict = [[NSDictionary alloc] initWithObjectsAndKeys:
                          @"000536", @"customerId",
                          @"000536", @"userId",
                          nil];

NSError *error;
NSData *postData = [NSJSONSerialization dataWithJSONObject:jsonDict options:0 error:&error];

NSString *postLength = [NSString stringWithFormat:@"%lu", (unsigned long)[postData length]];

NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
[request setURL:url];
[request setHTTPMethod:@"POST"];
[request setValue:postLength forHTTPHeaderField:@"Content-Length"];
[request setValue:@"application/json" forHTTPHeaderField:@"Accept"];
[request setValue:@"application/json; character=utf-8" forHTTPHeaderField:@"Content-Type"];
[request setHTTPBody:postData];

//[NSURLRequest setAllowsAnyHTTPSCertificate:YES forHost:[url host]];
NSURLSession *session = [NSURLSession sharedSession];
NSURLSessionDataTask *task = [session dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *err)
{
    // NSLog(@"Response code: %ld", (long)[response statusCode]);
    if(error || !data){
        NSLog(@"Server Error : %@", error);
    }
    else
    {
        NSLog(@"Server Response :%@",response);
        NSError* error;
        NSDictionary* json = [NSJSONSerialization
                              JSONObjectWithData:data
                              options:kNilOptions
                              error:&error];

        NSArray* latest = [json objectForKey:@"apptModel"];
        NSLog(@"items: %@", latest);
    }
}];
[task resume];

如何在post方法ios中向服务器请求数据？

1 个答案: