Stock Ticker

//Header file

#import <UIKit/UIKit.h>

@class StockTiker;

@protocol StockTickerDelegate
-(UIView*)viewForRow:(int)row inTicker:(StockTiker*)stock_Ticker;
-(int)numberOfRowsForStockTiker:(StockTiker*)stock_Ticker;
@end

@interface StockTiker : UIView
{
    int numberOfRows;
    id <StockTickerDelegate>delegate;
}
@property (nonatomic, retain) id <StockTickerDelegate> delegate;
@property (nonatomic,assign)NSInteger tag;

@end


//Implementation File....

#import "StockTiker.h"
#import "QuartzCore/QuartzCore.h"

static int count=0;

@implementation StockTiker
@synthesize delegate,tag;

- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
        numberOfRows=0;
        // Initialization code
    }
    return self;
}

-(void)moveSubView
{
    UIView *subView=[self.delegate viewForRow:count inTicker:self];

    CABasicAnimation *theAnimation;
    theAnimation=[CABasicAnimation animationWithKeyPath:@"transform.translation.x"];
    theAnimation.delegate=self;
    theAnimation.removedOnCompletion=YES;
    theAnimation.duration=10;
    theAnimation.repeatCount=1;
    theAnimation.autoreverses=NO;
    theAnimation.fromValue=[NSNumber numberWithFloat:320];
    theAnimation.toValue=[NSNumber numberWithFloat:-200];
    [subView.layer addAnimation:theAnimation forKey:@"animateLayer"];
}

- (CGRect)visibleRect
{
    CGRect visibleRect;
    UIView *view=[self.delegate viewForRow:count inTicker:self];
    visibleRect.origin = [view.layer.presentationLayer frame].origin;
    visibleRect.size = view.frame.size;
    return visibleRect;
}

-(void)addElement:(UIView*)subView
{
    if (![self.subviews containsObject:(id)subView]) {
        [self addSubview:subView];
        [self moveSubView];
    }
}

-(void)checkPosition
{
    float x=[self visibleRect].origin.x+[self visibleRect].size.width;

    if (x<300) {
        count=count+1;
        if (count==numberOfRows) {
            count=0;
        }
    }

    UIView *subView=[self.delegate viewForRow:count inTicker:self];
    [self addElement:subView];
}

- (void)drawRect:(CGRect)rect
{
    numberOfRows=[self.delegate numberOfRowsForStockTiker:self];
    [NSTimer scheduledTimerWithTimeInterval:0.05 target:self selector:@selector(checkPosition) userInfo:nil repeats:YES];
}

#pragma mark- animation did stop selector

- (void)animationDidStop:(CABasicAnimation *)theAnimation finished:(BOOL)flag
{
    [[self.subviews objectAtIndex:0] removeFromSuperview];
}
@end