目标 C - 如何检查 NSMutableArray 的所有元素 (NSMutableString) 是否都有值？

Question

I store user's answers inside NSMutableString element of array. i want to show a pop up (call popGoResultsAlert) when all of the array's element has the value and user would complete the questionary , i search over the internet but didn't succeed to find the solution for that.

here is my code :

in first class

 [UserData updateUserAnswerValues:[userData objectForKey:@"userAnswerValues"]];

//second class ,part of the userData.m

static NSMutableArray *userAnswerValues;

+ (NSMutableArray *)getAnswersCompleted {

    return userAnswerValues;
}

+ (void)updateUserAnswerValues:(NSArray *)newAnswerValues
{
    userAnswerValues = [[NSMutableArray alloc] init];
    [userAnswerValues addObjectsFromArray:newAnswerValues];
}




+ (void)updateUserAnswerValueWithIndex:(NSUInteger)index andValue:(NSMutableString*)value
{
    [userAnswerValues setObject:value atIndexedSubscript:index];
}

in 3rd class:

- (void)viewWillAppear:(BOOL)animated
{
    NSMutableArray *userAnswerValues = [UserData getAnswersCompleted];

    for (int i=0; i<userAnswerValues.count; i++) {

        id object = userAnswerValues[i];// similar to [myArray objectAtIndex:0]

        if(object && [object length] !=0  && i!=0)
    {
         [self popGoResultsAlert];
        break;

    } else if (!object) {
        continue;
    }

    }

}

Edit : //4th class , here seems the origin data is populated to the userAnswerValues base on what user pick from PickerView , that index has the value and that value is put by selectedOptionValue variable ... I have debug the userAnswerValues and notice the value has 56 elements like userAnswerValues = ( "", "", "", "", "", "", "", "", 4, 3, 4, 3, "", ... (fill the rest with ,"" until 56 items> , "" ); so whenever a user select a value in PickerView one of the above element filled out with index number , so my question is how search through these mutable array and see if all item has value...

   NSUInteger index = [self.currentQuestion.index integerValue];
    [UserData updateUserAnswerWithIndex:index andValue:self.selectedOptionIndex];
    Option *selectedOption = [self.currentOptions objectAtIndex:[self.selectedOptionIndex integerValue]];
    NSString *selectedOptionValue = selectedOption.value;
    [UserData updateUserAnswerValueWithIndex:index andValue:selectedOptionValue];

there is 3 section of questionary that store all the answer's value in a single and same array. with above code , the alert pop up whenever each of 3 section would be completed , my intend is it would only show pop up when all 3 section is completed....

I have test [object length] !=0 , ![object isEqual:[NSNull null]] , ![object isEqualToString:@""] with no luck , all of the 3 has same behaviour (show pop up after each section is completed ,

These project has not written by me from the scratch so i am trying to debug and fix some of it's bugs , when i debug userAnswerValues , i see that the items of NSMutableArray had different type in different elements type, as you see item 32th is _NSFConstantString with empty value , while the item 33th is NSTagedPointerString... please see the attached file for more details.

Answer 1

What I think you need is very similar to the previous answer. Here, I'll translate to your data names.

- (void)viewWillAppear:(BOOL)animated
{
    [super viewWillAppear:animated];
    BOOL showPopup = YES;    // Assume success
    NSMutableArray *userAnswerValues = [UserData getAnswersCompleted];

    // Try to go all the way through the array without finding an empty string
    for (int i = 0; i < userAnswerValues.count; i++) {
        id object = userAnswerValues[i];
        if ([object length] == 0) {
            showPopup = NO;  // Something is not filled in
            break;
        }
    }
    if (showPopup) {
        [self popGoResultsAlert];
    }
}

Answer 2

Bool nilBool = 0;
for (int i = 0 ; i < yourArray.count; i ++)
{
      NSString *value = [yourArray ObjectAtIndex:i];

      if([value isEqual: @""] || value == nil)
      {
          nilBool = 1;
      }
}

if(nilBool)
{
     //one if your values is nil!
}
else
{
    //all values are filled, you are good to go
}