iphone - iCarousel 的索引

Question

如何确定轮播的索引？或者加载到其中的数组索引？我已经从 NSDocumentDirectory 加载了图像。

self.myImages = [NSMutableArray new];  
for(int i = 1; i <= 30; i++) 
{ 
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsDir = [paths objectAtIndex:0];

    NSString *savedImagePath = [documentsDir stringByAppendingPathComponent:[NSString stringWithFormat:@"myImages%d.png", i]]; 
       if([[NSFileManager defaultManager] fileExistsAtPath:savedImagePath]){ 
            [images addObject:[UIImage imageWithContentsOfFile:savedImagePath]]; 
            NSLog(@"file exists");
        } 

} 

并将它们添加到 iCarousel View 中:

- (UIView *)carousel:(iCarousel *)_carousel viewForItemAtIndex:(NSUInteger)index reusingView:(UIView *)view
{
    view = [[UIImageView alloc] initWithImage:[myImages objectAtIndex:index]];
    return view;
}

Answer 1

如果我没有误解你的问题，你可以尝试使用 UIView 的 tag 属性进行比较。例如:

在viewForItemAtIndex中:

- (UIView *)carousel:(iCarousel *)_carousel viewForItemAtIndex:(NSUInteger)index  reusingView:(UIView *)view
{
    view = [[UIImageView alloc] initWithImage:[myImages objectAtIndex:index]];
    view.tag = index;
    return view;
}

将currentItemView与另一个图像进行比较

If (int == [(UIImageView*)[self.carousel currentItemView] tag]) { 
    //do something
}