iphone fading of images

Question

wat i want is to show an image in image view and fade the image after 5 seconds and show the next image .the images are stored in an array objects...i was able to make a su

Answer 1

@user652878 This answeres your question regarding fading seemlessly from one image to the next:

Create the following properties in your view controllers header:

UIImageView *imageViewBottom, *imageViewTop;
    NSArray *imageArray; 

Then add this code to your implimentaion file:

int topIndex = 0, prevTopIndex = 1; 
- (void)viewDidLoad {

    imageViewBottom = [[UIImageView alloc] initWithFrame:CGRectMake(0,0,320,480)];
    [self.view addSubview:imageViewBottom]; 

    imageViewTop = [[UIImageView alloc] initWithFrame:CGRectMake(0,0,320,480)];
    [self.view addSubview:imageViewTop];

    imageArray = [NSArray arrayWithObjects:  
                  [UIImage imageNamed:@"lori.png"],
                  [UIImage imageNamed:@"miranda.png"],
                  [UIImage imageNamed:@"taylor.png"],
                  [UIImage imageNamed:@"ingrid.png"],
                  [UIImage imageNamed:@"kasey.png"], 
                  [UIImage imageNamed:@"wreckers.png"], nil];


    NSTimer *timer = [NSTimer timerWithTimeInterval:5.0 
                                              target:self 
                                            selector:@selector(onTimer) 
                                            userInfo:nil 
                                             repeats:YES];

    [[NSRunLoop currentRunLoop] addTimer:timer forMode:NSDefaultRunLoopMode];
    [timer fire];

    [super viewDidLoad];
}

-(void)onTimer{
    if(topIndex %2 == 0){
        [UIView animateWithDuration:5.0 animations:^
        {
            imageViewTop.alpha = 0.0;
        }]; 
        imageViewTop.image = [imageArray objectAtIndex:prevTopIndex];
        imageViewBottom.image = [imageArray objectAtIndex:topIndex];
    }else{
        [UIView animateWithDuration:5.0 animations:^
         {
             imageViewTop.alpha = 1.0;
         }];    
        imageViewTop.image = [imageArray objectAtIndex:topIndex];
        imageViewBottom.image = [imageArray objectAtIndex:prevTopIndex];
    }
    prevTopIndex = topIndex; 
    if(topIndex == [imageArray count]-1){
        topIndex = 0; 
    }else{
        topIndex++; 
    }
}