iOS Changing font size in uipicker program

[freshwreckage]

Hello all...

I am a noob at programming but I am making some headway so... thank you in advance for any help you may choose to give. I am building an app that displays a 3 column picker. The words in the array are long, so I am trying to resize the fonts. I found a method I am trying to implement, but when I insert it into my code, my wheels come up blank. I know that this is a noob issue. But have yet to find a solution.

Here is my code...

DoubleComponentPickerViewController.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

DoubleComponentPickerViewController.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:@"%@ %@ %@ Warning.",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:
			@"sample1a",@"sample2a",@"sample3a",nil];
		self.firstTypes = firstArray;
		[firstArray release];
	
		NSArray *middleArray = [[NSArray alloc] initWithObjects:
			@"sample1b",@"sample2b",@"sample3b",nil];
		self.middleTypes = middleArray;
		[middleArray release];
		
		NSArray *lastArray = [[NSArray alloc] initWithObjects:
			@"sample1c",@"sample2c",@"sample3c",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];
		}
	}

 -(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];
		}
		
		/*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 for your help...
(please be kind to the noob...

 

[PhoneyDeveloper]

I think you need to set the text for the label that you return in viewForRow before you return it. The idea is that you either provide viewForRow or titleForRow for a given row.

 

[freshwreckage]

If I understand you correctly, I had tried that... Or I think I did...

Is this what youmean?

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

I have the method ahead of the -(NSInteger) line at one point but still only recieved blank wheels...

 

[PhoneyDeveloper]

No this:

- (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;	
	}

 

[freshwreckage]

Tried and failed before with the code in this order.
I get blank wheels...
Not sure why though... it should work.

 

[meierjo]

Tried and failed before with the code in this order.
I get blank wheels...
Not sure why though... it should work.

it works - just change the CGRect frame width:

CGRect frame = CGRectMake(0.0, 0.0, 270, 32.0);
270 is pretty wide!

Try something like 44