3 column picker blues

[Freshwreckage]

Hey all...

I am pulling my hair out on this one and for those who know this, it may be simple...

I am working on setting up an app that has three pickers. The backend seems to work as it returns the requested data. But, while wheel 1 and 2 have the requisite info, wheel 3 is visually identical to wheel 2. Yet when I hit the button, it is still pulling the proper info from the array.

Any help would be appreciated.

Thank you in advance...

Here is my code:

(Header file .h)

#import <UIKit/UIKit.h>
#define kfirstComponent 0	
#define kmiddleComponent 1
#define klastComponent 2

@interface DoubleComponentPickerViewController : UIViewController
	<UIPickerViewDelegate, UIPickerViewDataSource>
	{
		IBOutlet UIPickerView *doublePicker;
			NSArray *firstTypes;
			NSArray *middleTypes;
			NSArray *lastTypes;	
	}

@property (nonatomic,retain)  UIPickerView *doublePicker;
@property (nonatomic,retain)  NSArray *firstTypes;
@property (nonatomic,retain)  NSArray *middleTypes;
@property (nonatomic,retain)  NSArray *lastTypes;

-(IBAction)buttonPressed;



@end

(Config file .M)

#import "DoubleComponentPickerViewController.h"

@implementation DoubleComponentPickerViewController

@synthesize doublePicker;
@synthesize firstTypes;
@synthesize middleTypes;
@synthesize lastTypes;

-(IBAction)buttonPressed
	{
		NSInteger firstRow = [doublePicker selectedRowInComponent:kfirstComponent];
		NSInteger middleRow = [doublePicker selectedRowInComponent:kmiddleComponent];
		NSInteger lastRow = [doublePicker selectedRowInComponent:klastComponent];
		NSString *first = [firstTypes objectAtIndex:firstRow];
		NSString *middle = [middleTypes objectAtIndex:middleRow];
		NSString *last = [lastTypes objectAtIndex:lastRow];
		NSString *message = [[NSString alloc] initWithFormat:@"Your name is: %@ %@ %@.",first, middle, last];
		UIAlertView *alert = [[ UIAlertView alloc] initWithTitle:@"Full name"
			message:message
			delegate:nil
			cancelButtonTitle:@"Cancel"
			otherButtonTitles:nil];
		[alert show];
		[alert release];
		[message release];
	}

- (void)viewDidLoad 
	{
		NSArray *firstArray = [[NSArray alloc] initWithObjects:
			@"Willy",@"Peter",@"Michael",@"Sam",@"Bobby",nil];
		self.firstTypes = firstArray;
		[firstArray release];
	
		NSArray *middleArray = [[NSArray alloc] initWithObjects:
			@"Nathaniel",@"Joseph",@"Tad",@"Chad",@"Ross",nil];
		self.middleTypes = middleArray;
		[middleArray release];
		
		NSArray *lastArray = [[NSArray alloc] initWithObjects:
			 @"Jones",@"Pearson",@"Parker",@"Hart",@"Andersen",nil];
		self.lastTypes = lastArray;
		[lastArray release];

		
		[super viewDidLoad];
	}

-(NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView
	{
		return 3;
	}

-(NSInteger)pickerView:(UIPickerView *)pickerView
	numberOfRowsInComponent:(NSInteger)component
	
	{
		if (component == kfirstComponent)
			return[self.firstTypes count];
			return[self.middleTypes count];
			return[self.lastTypes count];
	}

 -(NSString *)pickerView:(UIPickerView *)pickerView
	titleForRow:(NSInteger)row
	forComponent:(NSInteger)component 
	{
		if (component == kfirstComponent)
			return [self.firstTypes objectAtIndex:row];
			return [self.middleTypes objectAtIndex:row]; 
		    return [self.lastTypes objectAtIndex:row];
	}
 

- (void)didReceiveMemoryWarning 
	{
	    [super didReceiveMemoryWarning];
	}

- (void)viewDidUnload 
	{
	}


- (void)dealloc 
	{
    [super dealloc];
	}

@end

Thank you again...


FW

[Robert Paulson]

Hi,

from your description, I am not sure I understand what's going wrong. However, there most certainly is something wrong here:

-(NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component {
		if (component == kfirstComponent)
			return[self.firstTypes count];
			return[self.middleTypes count];
			return[self.lastTypes count];
}

This doesn't make sense at all. What you want to do is this:

if (component == 0) {
	return [self.firstTypes count];
}

if (component == 1) {
	return [self.middleTypes count];
}

else {
	return [self.lastTypes count];
}

The same applies to your pickerView:titleForRow:forComponent: method. Google for a tutorial on if-statements to see the syntax you need in case you don't understand my code. Alternatively, you could use a switch-statement (I personally prefer that) but I thought it's best to stay as close to your code as possible.

Hope this helps.

Cheers,
Bob

[Freshwreckage]

Hey there...

Thanks!

Worked like a charm. Now I can put my hair back.
One more question if you don't mind...

Not finding anything in IB to manipulate the fornt style for the picker in IB.

Any pointers on a good place to look for that?

Thank you.

Originally Posted by Robert Paulson

Hi,

from your description, I am not sure I understand what's going wrong. However, there most certainly is something wrong here:

-(NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component {
		if (component == kfirstComponent)
			return[self.firstTypes count];
			return[self.middleTypes count];
			return[self.lastTypes count];
}

This doesn't make sense at all. What you want to do is this:

if (component == 0) {
	return [self.firstTypes count];
}

if (component == 1) {
	return [self.middleTypes count];
}

else {
	return [self.lastTypes count];
}

The same applies to your pickerView:titleForRow:forComponent: method. Google for a tutorial on if-statements to see the syntax you need in case you don't understand my code. Alternatively, you could use a switch-statement (I personally prefer that) but I thought it's best to stay as close to your code as possible.

Hope this helps.

Cheers,
Bob

[Robert Paulson]

Hi,

no, I don't mind. That's what this place is for.

Front style... you mean like the look of the picker? It's color etc.? As far as I know, you cannot change that. I wanted to do that myself the other day and haven't found something on it. The only 'solution' I found was some people suggesting to take a screen shot of the picker, customize it in Photoshop and then place the customized image over the real picker.

That's what I'll do since I haven't come across any better solution. Let me know if you find a way!

Hope this helps.

Cheers,
Bob

[Freshwreckage]

Sorry...

I fat fingered the word "font".

I want to change the font size and type.

I knew I should have paid closer attention in typing class...

Originally Posted by Robert Paulson

Hi,

no, I don't mind. That's what this place is for.

Front style... you mean like the look of the picker? It's color etc.? As far as I know, you cannot change that. I wanted to do that myself the other day and haven't found something on it. The only 'solution' I found was some people suggesting to take a screen shot of the picker, customize it in Photoshop and then place the customized image over the real picker.

That's what I'll do since I haven't come across any better solution. Let me know if you find a way!

Hope this helps.

Cheers,
Bob

[Robert Paulson]

Hey,

check out this thread over at Stack Overflow. Does that help?

Cheers,
Bob

[Freshwreckage]

Well, my first run is not necessarily producing the results I want heh... Unless of course I want blank wheels. Nope.

If I had hair I would have pulled it all out by now. You would think I would be getting this by now.

Here's my code.

#import "DoubleComponentPickerViewController.h"

@implementation DoubleComponentPickerViewController

@synthesize doublePicker;
@synthesize firstTypes;
@synthesize middleTypes;
@synthesize lastTypes;

-(IBAction)buttonPressed
{
	NSInteger firstRow = [doublePicker selectedRowInComponent:kfirstComponent];
	NSInteger middleRow = [doublePicker selectedRowInComponent:kmiddleComponent];
	NSInteger lastRow = [doublePicker selectedRowInComponent:klastComponent];
	NSString *first = [firstTypes objectAtIndex:firstRow];
	NSString *middle = [middleTypes objectAtIndex:middleRow];
	NSString *last = [lastTypes objectAtIndex:lastRow];
	NSString *message = [[NSString alloc] initWithFormat:@"%@ %@ %@ test.",first, middle, last];
	UIAlertView *alert = [[ UIAlertView alloc] initWithTitle:@"Description:"
													 message:message
													delegate:nil
										   cancelButtonTitle:@"Cancel"
										   otherButtonTitles:nil];
	[alert show];
	[alert release];
	[message release];
}


- (void)viewDidLoad 
{
	NSArray *firstArray = [[NSArray alloc] initWithObjects:
			@"a",@"b",@"c",@"d",nil];
		self.firstTypes = firstArray;
		[firstArray release];
	
		NSArray *middleArray = [[NSArray alloc] initWithObjects:
			@"A",@"B",@"C",@"D",nil];
		self.middleTypes = middleArray;
		[middleArray release];
		
		NSArray *lastArray = [[NSArray alloc] initWithObjects:
			@"1",@"2",@"3",@"4",nil];
		self.lastTypes = lastArray;
		[lastArray release];
	
	
	[super viewDidLoad];
}

-(NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView
{
	return 3;
}


/* Ugly attempt at sizing font */
/*

- (UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view 
{
	UILabel *pickerLabel = (UILabel *)view;
	// Reuse the label if possible, otherwise create and configure a new one
	if ((pickerLabel == nil) || ([pickerLabel class] != [UILabel class])) 
	{  //newlabel
		CGRect frame = CGRectMake(0.0, 0.0, 270, 32.0);
		pickerLabel = [[[UILabel alloc] initWithFrame:frame] autorelease];
		pickerLabel.textAlignment = UITextAlignmentLeft;
		pickerLabel.backgroundColor = [UIColor clearColor];
		pickerLabel.font = [UIFont fontWithName:@"AmericanTypewriter" size:8];
	}			
	pickerLabel.textColor = [UIColor blackColor];
	return pickerLabel;	
}

*/


-(NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component
{
	if (component == 0) 
	{
		return [self.firstTypes count];
	}
	
	if (component == 1) 
	{
		return [self.middleTypes count];
	}
	
	else 
	{
		return [self.lastTypes count];
	}
}

- (UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view 
{
	UILabel *pickerLabel = (UILabel *)view;
	// Reuse the label if possible, otherwise create and configure a new one
	if ((pickerLabel == nil) || ([pickerLabel class] != [UILabel class])) 
	{  //newlabel
		CGRect frame = CGRectMake(0.0, 0.0, 270, 32.0);
		pickerLabel = [[[UILabel alloc] initWithFrame:frame] autorelease];
		pickerLabel.textAlignment = UITextAlignmentLeft;
		pickerLabel.backgroundColor = [UIColor clearColor];
		pickerLabel.font = [UIFont fontWithName:@"AmericanTypewriter" size:8];
	}			
	pickerLabel.textColor = [UIColor blackColor];
	NSString*  text = nil;
	
	if (component == 0) 
	{
		text =  [self.firstTypes objectAtIndex:row];
	}
	else
		if (component == 1) 
		{
			text =  [self.middleTypes objectAtIndex:row];
		}
		else 
		{
			text =   [self.lastTypes objectAtIndex:row];
		}
	
	pickerLabel.text = text;
	
	return pickerLabel;	
}

/*
-(NSString *)pickerView:(UIPickerView *)pickerView
			titleForRow:(NSInteger)row forComponent:(NSInteger)component 
{
	if (component == 0) 
	{
		return [self.firstTypes objectAtIndex:row];
	}
	
	if (component == 1) 
	{
		return [self.middleTypes objectAtIndex:row];
	}
	
	else 
	{
		return [self.lastTypes objectAtIndex:row];
	}
	
	
}
*/

- (void)didReceiveMemoryWarning 
{
	[super didReceiveMemoryWarning];
}

- (void)viewDidUnload 
{
}


- (void)dealloc 
{
    [super dealloc];
}

@end

Any help in the right direction would be appreciated.

Thank you.