- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component {

    if (pickerView == self.heightPickerView  && component == 0)
            return [self.heightTypeArray count];
    else if (pickerView == self.heightPickerView  && component == 1){

        if ([self.heightPickerView selectedRowInComponent:0] == 0)
            return    [self.meterListArray count];

        else if ([self.heightPickerView  selectedRowInComponent:0] == 1)
            return      [self.feetInchListArray count];
    }

    return 0;
}

- (NSString *)pickerView:(UIPickerView *)pickerView
             titleForRow:(NSInteger)row
            forComponent:(NSInteger)component{

    if (component == 0) {
        return [self.heightTypeArray objectAtIndex:row];
    }

    else if (pickerView == self.heightPickerView  && component == 1){

        if ([self.heightPickerView selectedRowInComponent:0] == 0)
           return   [self.meterListArray objectAtIndex:row];

        else if (pickerView == self.heightPickerView && [self.heightPickerView  selectedRowInComponent:0] == 1){

              return   [self.feetInchListArray objectAtIndex:row];
    }