title: NSRangeException when I have multiple pickerViews for multiple textfields
body: <pre><code>#import "ProfileViewController.h"
  
  @implementation ProfileViewController{
      NSArray *currentArray;
      UITextField *currentTextField;
  }
  
  @synthesize picker, Feets, Inchs, Weights, Months, Days, Years, HeightValue, WeightValue, DOBValue;
  @synthesize scrollView;
  int variabla;
  
  // Control the textfield go up when tap the textfield and keyboard coming out
  - (void)textFieldDidBeginEditing:(UITextField *)textField
  {
      CGPoint scrollPoint = CGPointMake(0, textField.frame.origin.y);
      [scrollView setContentOffset:scrollPoint animated:YES];
      [textField resignFirstResponder];
      [picker setHidden:YES];
      currentTextField = textField;
      NSLog(@"222222");
      if (currentTextField == HeightValue)
      {
          NSLog(@"3333333");
          [HeightValue resignFirstResponder];
          [picker setHidden:NO];
          variabla = 1;
      }
      else if (currentTextField == WeightValue)
      {
          NSLog(@"4444444");
          [WeightValue resignFirstResponder];
          [picker setHidden:NO];
          variabla = 2;
      }
      else if (currentTextField == DOBValue){
          NSLog(@"5555555");
          [DOBValue resignFirstResponder];
          [picker setHidden:NO];
          variabla = 3;
      }
      NSLog(@"variabla %d",variabla);
      [picker reloadAllComponents];
  }
  
  - (void)viewDidLoad {
      [super viewDidLoad];
      NSLog(@"111111");
   NSString *path = [[NSBundle mainBundle]pathForResource:@"WeightList" ofType:@"plist"];
      Weights = [[NSMutableArray alloc]initWithContentsOfFile:path];
  
      [picker setHidden:YES];
  
   Feets = [[NSMutableArray alloc]initWithObjects:@"0ft", @"1ft", @"2ft", @"3ft", @"4ft", @"5ft", @"6ft", @"7ft", @"8ft", @"9ft",nil];
      Inchs = [[NSMutableArray alloc]initWithObjects:@"0in", @"1in", @"2in", @"3in", @"4in", @"5in", @"6in", @"7in", @"8in", @"9in", @"10in", @"11in",nil];
      Months = [[NSMutableArray alloc]initWithObjects:@"1", @"2", @"3",nil];
      Days = [[NSMutableArray alloc]initWithObjects:@"1", @"2", @"3",nil];
      Years = [[NSMutableArray alloc]initWithObjects:@"1", @"2", @"3",nil];
  
  
  #pragma mark - UIPcikerView DataSource and Delegate method
      // returns the number of 'columns' to display.
  - (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView{
      if (variabla == 1){
          return 2;
      }
      else if (variabla == 2){
          return 1;
      }
      else
          return 3;
  }
  
      // returns the # of rows in each component..
  - (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component{
      if (variabla == 1){
          if (component == feetComponent)
              return [Feets count];
          if (component == inchComponent)
              return [Inchs count];
      }
      if (variabla == 2){
          return [Weights count];
      }
      else{
          if (component == monthComponent)
              return [Months count];
          if (component == dayComponent)
              return [Days count];
          else
              return [Years count];
      }
  }
  
  
    // set the row text to the textfield
  - (nullable NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component __TVOS_PROHIBITED{
      if (variabla == 1){
          if (component == feetComponent)
              return Feets[row];
          if (component == inchComponent)
              return Inchs[row];
      }
      if (variabla == 2){
          return Weights[row];
      }
      else{
          if (component == monthComponent)
              return Months[row];
          if (component == dayComponent)
              return Days[row];
          else
              return Years[row];
      }
  }
  
  
  - (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component __TVOS_PROHIBITED{
      if (currentTextField == HeightValue){
          NSInteger feetRow = [picker selectedRowInComponent:feetComponent];
          NSInteger inchRow = [picker selectedRowInComponent:inchComponent];
          NSString *feet = Feets[feetRow];
          NSString *inch = Inchs[inchRow];
          NSString *msg = [[NSString alloc]initWithFormat:@"%@ %@", feet, inch];
          HeightValue.text = msg;
      }
      if (currentTextField == WeightValue){
          NSInteger weightRow = [picker selectedRowInComponent:weightComponent];
          NSString *weight = Weights[weightRow];
          NSString *msg2 = [[NSString alloc]initWithFormat:@"%@",weight];
          WeightValue.text = msg2;
      }
      if (currentTextField == DOBValue){
          NSInteger monthRow = [picker selectedRowInComponent:monthComponent];
          NSInteger dayRow = [picker selectedRowInComponent:dayComponent];
          NSInteger yearRow = [picker selectedRowInComponent:yearComponent];
          NSString *month = Months[monthRow];
          NSString *day = Days[dayRow];
          NSString *year = Years[yearRow];
          NSString *msg3 = [[NSString alloc]initWithFormat:@"%@ / %@ / %@", month, day, year];
          WeightValue.text = msg3;
      }
  
  }
  
  @end
  </code></pre>
  
  <p>Above is the <code>.m</code> file code. When I run the simulator, the first textfield for the Height is working fine, but in the Weight and Date textfield, the picker view got the exception. </p>
  
  <p><a href="http://i.stack.imgur.com/WcBRo.png" rel="nofollow">Simulator screen shot</a></p>
  
  <p><a href="http://i.stack.imgur.com/ebyl4.png" rel="nofollow">NSRangeException screen shot</a></p>