ios - 由于未捕获的异常 'NSInvalidArgumentException' 而终止应用程序，原因 : '-[Home isEqualToString:]

Question

我正在从网络服务中获取数据:

//temp1 is NSDictionary
//responseArr1 is NSMutableArray
for(temp1 in responseArr1)......., 
{
     quesTxt = [[temp1 objectForKey:@"question_text"] stringByReplacingOccurrencesOfString:@"%PROFILENAME%" withString:del.onlyFirstName];

     quesID = [temp1 objectForKey:@"idlife_stage_question"];

     Home *objHome=[[Home alloc] init];

     objHome.homeQuesTxt = quesTxt;
     objHome.homeQuesID = quesID;

     [quesArray addObject:objHome];

     //[quesArray addObject:[[temp1 objectForKey:@"question_text"] stringByReplacingOccurrencesOfString:@"%PROFILENAME%" withString:del.onlyFirstName]];//this works fine

        }

当我尝试在选择器 View 中填充所有日期时，它给出了异常。

选择器 View 委托(delegate):

- (UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view {
    UILabel *retval = (id)view;
    if (!retval) {
        retval= [[UILabel alloc] initWithFrame:CGRectMake(0.0f, 0.0f, [pickerView rowSizeForComponent:component].width, [pickerView rowSizeForComponent:component].height)];
    }

    retval.text = [quesArray objectAtIndex:row];.........// **EXCEPTION HERE**...

    retval.font = [UIFont boldSystemFontOfSize:14];
    retval.numberOfLines = 3;

    return retval;
}

我的网络服务示例:

{
        "idlife_stage_question" = 35;
        "life_stage_idlife_stage" = 1;
        "profile_idprofile" = 0;
        "question_text" = "When %PROFILENAME% first smiled?";..//%PROFILENAME% replaces with user name which i have
        sequence = 34;
    }

Home 是 NSObject 的子类

请帮忙。

Answer 1

retval.text = [quesArray objectAtIndex:row];

在这里您正在访问 quesArray。

如:[quesArray addObject:objHome];

objHome 是:Home *objHome=[[Home alloc] init];

所以您的错误就在这里，您试图将对象放入需要 NSString 的 retval 中。

你需要使用一些东西作为:

retval.text = [[quesArray objectAtIndex:row] homeQuesTxt]; //or anyother property that you want to show in text