Unable to add more components to picker view - objective-c

Question

I pretty sure I'm using the method correctly:
-(NSInteger) numberOfComponentsinPickerView:(UIPickerView *)pickerView {
return 3;
}
Shouldn't that be enough to create three components in the picker, because when I run the program it just shows the one component that I originally had.
Here the code I used:
// Create the picker
-(void) createPickerData {
//Set up a path to the plist
NSString *path = [[NSBundle mainBundle] bundlePath];
NSString *finalPath = [path stringByAppendingPathComponent:#"WheelData.plist"];
NSDictionary *plistData = [NSDictionary dictionaryWithContentsOfFile:finalPath];
NSArray *letterArray = [NSArray arrayWithArray:[plistData objectForKey:#"LetterArray"]];
numberOfLetters = [letterArray count];
NSMutableArray *firstLetterArray = [[NSMutableArray alloc] initWithCapacity:numberOfLetters];
for (int i = 0; i < numberOfLetters; i++) {
[firstLetterArray addObject:[[letterArray objectAtIndex:i] objectForKey:#"Letter"]];
}
pickerDataForName = [NSArray arrayWithArray:firstLetterArray];
}
// Positions the picker on the screen
-(void) showPicker {
CGRect rect =CGRectMake(60, 650, self.frame.size.width - 120, 400);
enterNamePicker = [[UIPickerView alloc] initWithFrame:rect];
enterNamePicker.delegate = self;
[self addSubview:enterNamePicker];
}
//This sets the number of components wheels (or columns) in a picker view
-(NSInteger) numberOfComponentsinPickerView:(UIPickerView *)pickerView {
//Creating 3 wheels
return 3;
}
// Defines the how many rows (or items) are in the picker view
-(NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component {
return [pickerDataForName count];
}
// is run anytime you change the picker
-(UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent: (NSInteger)component reusingView:(UIView *)view {
//Here we are seting up a label for each object in each row / component
UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, self.frame.size.width, 50)];
label.textAlignment = NSTextAlignmentCenter;
label.backgroundColor = [UIColor whiteColor];
//label.adjustsFontSizeToFitWidth = YES;
label.textColor = [UIColor blackColor];
label.font = [UIFont fontWithName:universalFont size:30];
label.text = [NSString stringWithFormat:#"%#", [pickerDataForName objectAtIndex:row]];
return label;
}
-(void) pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component {
NSLog(#"Row %i selected", [enterNamePicker selectedRowInComponent:0]);
}