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
解决方法
我试图做类似的事情.我做的是设置一个计时器,在UIImageView上调用UIView transitionWithView,它通过我的幻灯片照片数组递增.
- (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];
}