正如我的标题所示，我想知道是否有iCarousel委托方法和属性，当自动滚动时，我可以使用它为横幅视图的每个项目设置显示时间。
以前，我使用SDCycleScrollView作为横幅视图，我是这样做的：
- (void)cycleScrollView:(SDCycleScrollView *)cycleScrollView didScrollToIndex:(NSInteger)index {
BannerData *data = self.bannerDatas[index];
NSLog(@"***************cycleScrollView************************");
NSLog(@"index --> %ld", (long)index);
NSLog(@"banner data --> %@", data);
NSLog(@"banner data duration --> %d", data.duration);
cycleScrollView.autoScrollTimeInterval = data.duration;
}
数据。duration是每个项目保持静止的持续时间。如何使用iCarousel实现这一点？提前谢谢。
以下是迄今为止我的iCarousel方法：
- (NSInteger)numberOfItemsInCarousel:(__unused iCarousel *)carousel
{
NSLog(@">>>>>>>>>number of items in Carousel --> %lu", (unsigned long)[self.bannerDatas count]);
return (NSInteger)[self.bannerDatas count];
}
- (UIView *)carousel:(__unused iCarousel *)carousel viewForItemAtIndex:(NSInteger)index reusingView:(UIView *)view
{
view = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 520, 375)];
NSLog(@"url --> %@", [NSURL URLWithString:[self.netImages objectAtIndex:index]]);
[((UIImageView *)view)sd_setImageWithURL:[NSURL URLWithString:[self.netImages objectAtIndex:index]] placeholderImage:[UIImage imageNamed:@"placeholder.png"]];
view.contentMode = UIViewContentModeCenter;
return view;
}
- (void)scrollToItemAtIndex:(NSInteger)index duration:(NSTimeInterval)duration
{
BannerData *data = self.bannerDatas[index];
NSLog(@"***************cycleScrollView************************");
NSLog(@"index --> %ld", (long)index);
NSLog(@"banner data --> %@", data);
NSLog(@"banner data duration --> %d", data.duration);
}
- (CGFloat)carousel:(__unused iCarousel *)carousel valueForOption:(iCarouselOption)option withDefault:(CGFloat)value
{
//customize carousel display
switch (option)
{
case iCarouselOptionWrap:
{
//normally you would hard-code this to YES or NO
return YES;
}
case iCarouselOptionSpacing:
{
//add a bit of spacing between the item views
//return value * 1.05;
}
case iCarouselOptionFadeMax:
{
// if (self.carousel.type == iCarouselTypeCustom)
// {
// //set opacity based on distance from camera
// return 0.0;
// }
// return value;
}
case iCarouselOptionShowBackfaces:
case iCarouselOptionRadius:
case iCarouselOptionAngle:
case iCarouselOptionArc:
case iCarouselOptionTilt:
case iCarouselOptionCount:
case iCarouselOptionFadeMin:
case iCarouselOptionFadeMinAlpha:
case iCarouselOptionFadeRange:
case iCarouselOptionOffsetMultiplier:
case iCarouselOptionVisibleItems:
{
return value;
}
}
}
#pragma mark -
#pragma mark iCarousel taps
- (void)carousel:(__unused iCarousel *)carousel didSelectItemAtIndex:(NSInteger)index
{
BannerData *data = self.bannerDatas[index];
if (![data.playlistId isEqualToString:@""]) { //Play Playlist
CategoryDetailData *detailData = [[CategoryDetailData alloc]init];
detailData.categoryId = data.playlistId;
RandomSecondVC *vc = [self.storyboard instantiateViewControllerWithIdentifier:@"RandomSecondVC"];
vc.detailData = detailData;
NSLog(@"vc.detailData.categoryId --> %@", vc.detailData.categoryId );
vc.hidesBottomBarWhenPushed = YES; //????sanit
[self.navigationController pushViewController:vc animated:YES];
} else if (![data.url isEqualToString:@""]) { //Show webview
WebViewVC *vc = [self.storyboard instantiateViewControllerWithIdentifier:@"WebViewVC"];
vc.hidesBottomBarWhenPushed = YES;
vc.navTitle = @"";
vc.urlString = data.url;
[self.navigationController pushViewController:vc animated:YES];
}else if (![data.videoId isEqualToString:@""]) { //Play video
VideoDetailVC *detailView = [self.storyboard instantiateViewControllerWithIdentifier:@"VideoDetailVC"];
detailView.videoId = data.videoId;
detailView.hidesBottomBarWhenPushed = YES; //????sanit
[self.navigationController pushViewController:detailView animated:YES];
}
}
下面是我如何放置旋转木马视图：
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewCell *tableCell = nil;
if (indexPath.section == 0) { //for banner
//++++++++++++++++++++??sanit iCarousel ver.1++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++//
NSLog(@"first section!!!!!!!!");
static NSString *BannerCellIdentifier = @"BannerTableViewCell"; //original
BannerTableViewCell *bannerCell = [tableView dequeueReusableCellWithIdentifier:BannerCellIdentifier]; //original
//BannerTableViewCell *bannerCell = [[BannerTableViewCell alloc]init];
[self setUpNetImages];
bannerCell.carouselView.type = iCarouselTypeCoverFlow2;
//bannerCell.carouselView.type = iCarouselTypeLinear;
//bannerCell.carouselView.autoscroll = 1; //?????sanit set autoscroll
bannerCell.carouselView.delegate = self;
bannerCell.carouselView.dataSource =self;
//??????sanit to fix banner timing issue first banner
//BannerData *data0 = self.bannerDatas[1]; //???santi
//self.cycleScrollView.autoScrollTimeInterval = data0.duration; // use this to fix timing issue of first slide
//[bannerCell.carouselView scrollToItemAtIndex:0 duration:data0.duration];
//bannerCell.carouselView.autoscroll = 0.8;
//[bannerCell.carouselView scrollToItemAtIndex:0 duration:5];
//[bannerCell.carouselView scrollToItemAtIndex:1 animated:YES];
[bannerCell.carouselView reloadData];
tableCell = bannerCell;
//+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++=//
} else { //for collection cell below
NSLog(@"not first section!!!!!!!! %d",(int)indexPath.section);
static NSString *MainHeaderCellIdentifier = @"MainHeaderTableViewCell";
MainHeaderTableViewCell *mainHeaderCell = (MainHeaderTableViewCell *)[tableView dequeueReusableCellWithIdentifier:MainHeaderCellIdentifier]; //original
mainHeaderCell.collectionView = (UICollectionView *)[mainHeaderCell viewWithTag:100];
mainHeaderCell.collectionView.delegate = self;
mainHeaderCell.collectionView.dataSource = self;
//NSLog(@"mainHeaderCell.index = %d",(int)mainHeaderCell.index);
//original
if (mainHeaderCell.collectionView == nil) {
NSLog(@"CollectionView Nil!!!!!!!");
}
tableCell = mainHeaderCell;
}
return tableCell;
}
看起来iCarousel没有这个选项，但幸运的是，您可以自己实现这样的功能：
@property (nonatomic, strong) NSMutableDictionary *operations;
@property (nonatomic) BOOL isDragging;
- (void) carouselDidEndScrollingAnimation:(iCarousel *)carousel
{
if (!self.isDragging){
NSNumber *tag = @(carousel.tag);
[self.operations[tag] cancel];
self.operations[tag] = [NSBlockOperation blockOperationWithBlock:^{
double duration = [self durationForItemAtIndex:carousel.currentItemIndex inCarousel:carousel];
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(duration * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
NSInteger i = carousel.currentItemIndex + 1;
NSInteger next = i < carousel.numberOfItems ? i : 0;
[carousel scrollToItemAtIndex:next animated:YES];
});
}];
[(NSOperation*)(self.operations[tag]) start];
}
}
- (void) carouselWillBeginDragging:(iCarousel *)carousel
{
[self.operations[@(carousel.tag)] cancel];
self.isDragging = YES;
}
- (void) carouselDidEndDragging:(iCarousel *)carousel willDecelerate: (BOOL)decelerate
{
self.isDragging = NO;
}
- (double) durationForItemAtIndex:(NSInteger)index inCarousel:(iCarousel*)carousel
{
return <appropriate_duration_for_particular_carousel_and_item_index_in_it>;
}
- (void) startCarousel:(iCarousel*)carousel
{
[self carouselDidEndScrollingAnimation:carousel];
}
更新-[tableView:cellForRowAtIndexPath:]方法：
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
<...>
if (indexPath.section == 0) {
<...>
bannerCell.carouselView.tag = indexPath.row;
[self startCarousel:bannerCell.carouselView];
} else {
<...>
}
return tableCell;
}
在使用之前，不要忘记在某个地方初始化operations字典：
self.operations = [NSMutableDictionary new];
然而，所有这些都是草稿——您可能需要根据需要调整和升级这些片段。