Tap label to toggle between two pieces of text. A nice trick to de-clutter an interface.

DoubleLabel.h

//
//  DoubleLabel.h
//  LongTermTimer
//
//  Created by Jason Moore on 11-05-31.
//  Copyright 2011 xinsight. All rights reserved.
//

#import <UIKit/UIKit.h>


@interface DoubleLabel : UIView {

	UILabel *front;
	UILabel *back;
	UILabel *end;
	
	BOOL isFrontVisible;
}

@property (nonatomic,assign) NSString* frontText;
@property (nonatomic,assign) NSString* backText;

- (id) initWithFrame:(CGRect)frame Front:(NSString*)front_ Back:(NSString*)back_;

@end

DoubleLabel.m

//
//  DoubleLabel.m
//  LongTermTimer
//
//  Created by Jason Moore on 11-05-31.
//  Copyright 2011 xinsight. All rights reserved.
//

#import "DoubleLabel.h"

@implementation DoubleLabel

@synthesize frontText, backText;

- (void) dealloc;
{
	[front release];
	[back release];	
	[end release];
	
    [super dealloc];
}

- (id) initWithFrame:(CGRect)frame;
{
	return [self initWithFrame:frame Front:@"" Back:@""];
}

- (id) initWithFrame:(CGRect)frame Front:(NSString*)front_ Back:(NSString*)back_;
{    
    self = [super initWithFrame:frame];
    if (self) {
		
		UILabel *label;
		
		label = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, frame.size.width, frame.size.height)];
		label.backgroundColor = [UIColor clearColor];
		label.textColor = UIColorFromRGBHex(0x848484);
		label.textAlignment = UITextAlignmentCenter;
		label.text = front_;
		label.font = [UIFont systemFontOfSize:14];
		front = label;
		
		[self addSubview:front];

		label = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, frame.size.width, frame.size.height)];
		label.backgroundColor = [UIColor clearColor];
		label.textColor = UIColorFromRGBHex(0x848484);
		label.textAlignment = UITextAlignmentCenter;
		label.text = back_;
		label.font = [UIFont systemFontOfSize:14];
		label.alpha = 0;
		back = label;

		[self addSubview:back];
		
		label = [[UILabel alloc] initWithFrame:CGRectMake(frame.size.width-10-10, 0, 10, frame.size.height)];
		label.backgroundColor = [UIColor clearColor];
		label.textColor = UIColorFromRGBHex(0xeeeeee);
		label.textAlignment = UITextAlignmentCenter;
		label.text = @"•";
		label.font = [UIFont systemFontOfSize:21];
		label.alpha = 1.0;
		end = label;
		
		[self addSubview:end];
		
		isFrontVisible = YES;
		
    }
    return self;
}

- (void) setFrontText:(NSString*)front_;
{
	front.text = front_;
}

- (void) setBackText:(NSString*)back_;
{
	back.text = back_;
}


- (void) touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event;
{
	[UIView animateWithDuration:0.3 animations:^{
		isFrontVisible = !isFrontVisible;
		if (isFrontVisible) {
			back.alpha = 0.0;
			end.frame = CGRectMake(self.frame.size.width-10-10, 0, 10, self.frame.size.height);
		} else {
			front.alpha = 0.0;
			end.frame = CGRectMake(10, 0, 10, self.frame.size.height);
		}
	} completion:^(BOOL finished){
		
		[UIView animateWithDuration:0.3 animations:^{
			if (isFrontVisible) {
				front.alpha = 1.0;
			} else {
				back.alpha = 1.0;
			}
		}];
		
	}];
	
}


@end