适用于iOS的幻灯片放映图片

Question

m文件幻灯片查看我的照片，我有8个但是在运行程序时它会跳过1号图片并从2 pic.how开始做正确的事

- (void)viewDidLoad
{    
    [super viewDidLoad];   
    imageId=0;
    [NSTimer scheduledTimerWithTimeInterval:2.0 target:self selector:@selector(changeImage) userInfo:nil repeats:YES];
}

-(void)changeImage
{
    imageId = imageId + 1;
    CATransition * trs = [CATransition animation];
    trs.duration = 1;
    [trs setType:kCATransitionPush];
    int id = imageId % NUMBER_OF_IMAGES;
    imageView.image = [UIImage imageNamed:[NSString stringWithFormat:@"%d.png", id]];
    [imageView.layer addAnimation:trs forKey:kCATransition];
}

Answer 1

如Chris所述，您在加载图像时会增加图像编号。 只需将增量线移动到方法的末尾：

-(void)changeImage {
//    imageId = imageId + 1;
    CATransition * trs = [CATransition animation];
    trs.duration = 1;
    [trs setType:kCATransitionPush];
    int id = imageId % NUMBER_OF_IMAGES;
    imageView.image = [UIImage imageNamed:[NSString stringWithFormat:@"%d.png", id]];
    [imageView.layer addAnimation:trs forKey:kCATransition];
    imageId++;
}