Question

我是AfNetworking的新手，我希望在运行我的函数后得到数组，但我总是会崩溃，因为它很晚才将数据加载到数组中，有没有办法阻止它直到它将所有数据加载到数组中？

   -(void) getModelDetails :(NSString*)brandName  completionHandler:(void (^)(id array))success
{

    NSString *brand = [brandName stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
    [MBProgressHUD showHUDAddedTo:self.view animated:YES];
    AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
    NSString *link = [NSString stringWithFormat:@"http://phablet-fix.com/mob/get-model-details.php?model=%@",brand];
    NSLog(@"%@",link);
    manager.responseSerializer.acceptableContentTypes = [manager.responseSerializer.acceptableContentTypes setByAddingObject:@"text/html"];
    [manager GET:link parameters:nil success:^(AFHTTPRequestOperation *operation, id responseObject) {
        NSLog(@"JSON: %@", responseObject);
        NSMutableArray *dataArray = [[NSMutableArray alloc] init];
        NSDictionary *returnedDealDict = responseObject ;
        NSArray *returnArray = [returnedDealDict objectForKey:@"modeldetails"];
        for(NSDictionary *dealDict in returnArray)
        {
            model = [[ModelDC alloc] init];
            model.modelID = [[dealDict objectForKey:@"id"] intValue];
            model.model = [dealDict objectForKey:@"model"];
            model.mDeviceBrand = [dealDict objectForKey:@"device_brand"];
            model.mDeviceType = [dealDict objectForKey:@"device_type"];
            model.mProtectionPlanAvilable = [dealDict objectForKey:@"protection_plan_available"];
            model.mSilverPlan1year = [dealDict objectForKey:@"silver_plan_price_1year"];
            model.mSilverPlan2Year = [dealDict objectForKey:@"silver_plan_price_2year"];
            model.mSilverPlan3Year = [dealDict objectForKey:@"silver_plan_price_3year"];
            model.mGoldPlan1year = [dealDict objectForKey:@"gold_plan_price_1year"];
            model.mGoldPlan2year = [dealDict objectForKey:@"gold_plan_price_2year"];
            model.mGoldPlan3Year = [dealDict objectForKey:@"gold_plan_price_3year"];

            [dataArray addObject:model];

        }
        success(dataArray);
        [MBProgressHUD hideHUDForView:self.view animated:YES];
        if (dataArray.count == 0)
        {
            ALERT_VIEW(@"Please check your internet connection.");
            [MBProgressHUD hideHUDForView:self.view animated:YES];
        }
        else
        {
        }

    }
         failure:^(AFHTTPRequestOperation *operation, NSError *error) {
             NSLog(@"Error: %@", error);
             ALERT_VIEW(@"Error occured while loading data.");
             [MBProgressHUD hideHUDForView:self.view animated:YES];
         }];

}

在我的tableview中，我的数据为零

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath :(NSIndexPath *)indexPath
{
    model = [planArray objectAtIndex:indexPath.row];
    lblselectYourDevice.text = model.selectedModel;
    tblView.hidden = YES;
    modelDetailArray = [[NSMutableArray alloc] init];
    [self getModelDetails:model.selectedModel completionHandler:^(id array)
    {
        modelDetailArray = array;
    }];
    NSLog(@"%d",modelDetailArray.count);
    model = [[ModelDC alloc] init];
    model = [modelDetailArray objectAtIndex:indexPath.row];

}

Answer 1

这永远不会奏效：

modelDetailArray = [[NSMutableArray alloc] init];
[self getModelDetails:model.selectedModel completionHandler:^(id array)
{
    modelDetailArray = array;
}];
NSLog(@"%d",modelDetailArray.count);
model = [[ModelDC alloc] init];
model = [modelDetailArray objectAtIndex:indexPath.row];

因为您正在创建一个空数组，要求使用数据填充它，然后立即使用它而不等待填充（或检查实际获得的数据）。

更改为：

modelDetailArray = nil;

[self getModelDetails:model.selectedModel completionHandler:^(id array) {
    modelDetailArray = array;

    NSLog(@"%d", modelDetailArray.count);
    if (modelDetailArray.count > indexPath.row) {
        model = [modelDetailArray objectAtIndex:indexPath.row];

        // trigger the UI update or next piece of processing here
    } else {
        // deal with the error
    }
}];

请注意，这也不会创建您不会使用的空对象。

Afnetworking迟到的回应

1 个答案: