Question

我有一个UITableViewController，我正在尝试使用此代码从url获取JSON数据但我收到错误。我该怎么办？

  AFSecurityPolicy *securityPolicy = [[AFSecurityPolicy alloc] init];
        [securityPolicy setAllowInvalidCertificates:YES];

        NSString *urlPath = [NSString stringWithFormat:@"http://testurl.com/api/index.php"];
        AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];

        NSDictionary *parameters = @{@"process":@"search_customer",@"page": @""};
        manager.responseSerializer.acceptableContentTypes = [NSSet setWithObject:@"text/html"];

        [manager setSecurityPolicy:securityPolicy];
        manager.responseSerializer = [AFHTTPResponseSerializer serializer];

        [manager POST:urlPath parameters:parameters success:^(AFHTTPRequestOperation *operation, id responseObject) {
            NSString *string = [[NSString alloc] initWithData:responseObject encoding:NSUTF8StringEncoding];

            NSData *jsonData = [NSData dataWithContentsOfFile:string];
            NSError *error = nil;
            NSDictionary *dataDictionary = [NSJSONSerialization JSONObjectWithData:jsonData options:0 error:&error];
            self.customerCards = [NSMutableArray array];
            NSArray *customersArray = [dataDictionary objectForKey:@"musteri_list"];
            for (NSDictionary *customersDictionary in customersArray) {
                ApiClass *customer = [ApiClass customersWithTitle:[customersDictionary objectForKey:@"adi"]];
                customer.tel = [customersDictionary objectForKey:@"tel"];

                [self.customerCards addObject:customer];
            }

            NSLog(@"GET: %@", string);
            NSLog(@"POST: %@", parameters);
        } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
            NSLog(@"Error: %@", error);
        }];

这是错误集团

2015-03-26 14:27:37.656 SaphiraCrm[13770:3881729] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'data parameter is nil'

Answer 1

我认为问题可能在于您将responseObject视为NSData，但根据AFNetworking examples，默认情况下{{} 1}} AFHTTPRequestOperationManager是responseSerializer，因此AFJSONResponseSerializer已经是一个解析的JSON，表示为responseObject（取决于序列化程序）。

因此，行

NSDictionary

返回NSString *string = [[NSString alloc] initWithData:responseObject encoding:NSUTF8StringEncoding];，这会导致下一行

nil

提出异常。

我建议您检查NSData *jsonData = [NSData dataWithContentsOfFile:string];是否符合预期，并相应地重构您的代码。

responseObject

注意：上述情况很可能只是您设置seriliazer配置的前一个错误的结果，因为您首先先设置... [manager POST:urlPath parameters:parameters success:^(AFHTTPRequestOperation *operation, id responseObject) { if (responseObject) { NSLog(@"Response is a %@ and contains: %@", [responseObject class], responseObject); // Process responseObject according to its type ...，然后使用默认值覆盖它。

acceptableContentType

Answer 2

Okey我想出了我该怎么做。

有我的代码

AFSecurityPolicy *securityPolicy = [[AFSecurityPolicy alloc] init];
    [securityPolicy setAllowInvalidCertificates:YES];


    NSString *urlPath = [NSString stringWithFormat:@"http://test.com/api/index.php"];
    AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];

    NSDictionary *parameters = @{@"process":@"search_customer",@"page": @""};
    manager.responseSerializer.acceptableContentTypes = [NSSet setWithObject:@"text/html"];

    [manager setSecurityPolicy:securityPolicy];
    manager.responseSerializer = [AFHTTPResponseSerializer serializer];

    [manager POST:urlPath parameters:parameters success:^(AFHTTPRequestOperation *operation, id responseObject) {
        NSString *string = [[NSString alloc] initWithData:responseObject encoding:NSUTF8StringEncoding];
        NSError *error = nil;
        NSData *jsonData = [string dataUsingEncoding:NSUTF8StringEncoding];
        NSDictionary *dataDictionary = [NSJSONSerialization JSONObjectWithData:jsonData options:0 error:&error];

        self.customerCards = [NSMutableArray array];
        NSArray *customersArray = [dataDictionary objectForKey:@"musteri_list"];
        NSLog(@"%@",customersArray);
        for (NSDictionary *customersDictionary in customersArray) {
            ApiClass *customer = [ApiClass customersWithTitle:[customersDictionary objectForKey:@"adi"]];
            customer.tel = [customersDictionary objectForKey:@"tel"];

            [self.customerCards addObject:customer];

        }
        [self.tableView reloadData];

        NSLog(@"GET: %@", string);
    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        NSLog(@"Error: %@", error);
    }];

AFNetworking数据参数是nil JSON数据

2 个答案: