在imageview中淡出幻灯片.xCode 4.2

Question

我正在尝试在使用淡入淡出效果的imageview中制作幻灯片.

到目前为止我做到了这一点:

    - (void)viewDidLoad
{
    [super viewDidLoad];
    animationView = [[UIImageView alloc] initWithFrame:self.view.frame];
    animationView.animationImages = [NSArray arrayWithObjects:   
                                     [UIImage imageNamed:@"photo1.jpg"],
                                     [UIImage imageNamed:@"photo2.jpg"],
                                     [UIImage imageNamed:@"photo3.jpg"], nil];

    animationView.animationDuration = 5;
    animationView.animationRepeatCount = 0;
    [animationView startAnimating];
    [self.view addSubview:animationView];
}

图像确实一个接一个地出现,在5秒的延迟中,我现在想要的是每次出现图像时使它们淡入和淡出,对此有何建议？

在此先感谢您的帮助

Answer 1

我试图做类似的事情.我所做的就是建立一个调用一个计时器UIView transitionWithView上UIImageView这是通过我的幻灯片照片阵列递增.

- (void)viewDidLoad{
[super viewDidLoad];
self.welcomePhotos = [NSArray arrayWithObjects:@"welcome_1.png",@"welcome_2.png", @"welcome_3.png", nil];
self.imageView1.image = [UIImage imageNamed:[self.welcomePhotos objectAtIndex:0]];
[NSTimer scheduledTimerWithTimeInterval:3.0 target:self selector:@selector(transitionPhotos) userInfo:nil repeats:YES];
}


-(void)transitionPhotos{

if (photoCount < [self.welcomePhotos count] - 1){
    photoCount ++;
}else{
    photoCount = 0;
}
[UIView transitionWithView:self.imageView1
                  duration:2.0
                   options:UIViewAnimationOptionTransitionCrossDissolve
                animations:^{ self.imageView1.image = [UIImage imageNamed:[self.welcomePhotos objectAtIndex:photoCount]]; }
                completion:NULL];    
}