ios - 如何在ios中的成功 block 中返回数组

Question

我正在从 Web 服务获取数据。然后我想将该数据放入可变数组并返回该数组。我只是为了检查数组是否为空。

我已经在我的头文件中定义了这个

typedef void(^FailureBlock)(NSError *error);
typedef void(^SuccessBlock) (NSArray *responseArray);

这是我的实现文件

- (void)setupConnectionWithsuccess:(SuccessBlock)success failure:(FailureBlock)failure
{
    airportArray = nil;
    NSString *Code = [NSString stringWithFormat:@"something"];
    NSString *authCode = [NSString stringWithFormat:@"something"];
    NSString *baseurl = [NSString stringWithFormat:@"someurl%@%@",authCode,Code];
//    NSString *mainurlString = [NSString stringWithFormat:@""];
//    NSURL *mainurl = [NSURL URLWithString:mainurlString];

    AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
    [manager GET:baseurl parameters:nil progress:nil success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {

        NSArray *mainArray = (NSArray *)responseObject;

        airportArray = [[NSMutableArray alloc] init];
        for (NSDictionary *all in mainArray) {
            airports = [all objectForKey:@"port"];

            [airportArray addObject:airports];
            NSLog(@"%@", airports);
        }

        if(_successBlock){
            _successBlock(airportArray);
        }

        //NSLog(@"%@", responseObject);
    }
    failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {

        if (_failureBlock) {
            _failureBlock(error);
        }
        UIAlertController *mainAlert = [UIAlertController alertControllerWithTitle:@"Something Wrong!" message:[error localizedDescription] preferredStyle:UIAlertControllerStyleAlert];
        [self presentViewController:mainAlert animated:YES completion:nil];

    }];




}

- (void)printap
{   NSLog(@"ffffuuu");
    [self setupConnectionWithsuccess:^(NSArray *responseArray) {

        NSLog(@"Checking ::::%@", responseArray);

    } failure:^(NSError *error) {

        UIAlertController *failureAlert = [UIAlertController alertControllerWithTitle:@"Errrrr..." message:@"Errrrr...." preferredStyle:UIAlertControllerStyleAlert];
        [self presentViewController:failureAlert animated:YES completion:nil];
    }];
    NSLog(@"fkjfkdjkfjdkfjdk");
}

** 我想在检索到数据后使用这个 airportArray(想要返回数组)。我该怎么做

Answer 1

这些行:

    if(_successBlock){
        _successBlock(airportArray);
    }

应该是:

    if(success){
        success(airportArray);
    }

我不知道 _successBlock 是什么，但您想使用传递给 setupConnectionWithsuccess:failure: 方法的参数。

通过将 _failureBlock 替换为 failure 对失败 block 进行类似的更改。