github下载地址https://github.com/maajian/AJCarousel
主要功能 : 图片轮播
封装其他效果 :
1 设置分页控制器的颜色
2 设置分页控制器当前页面选中的颜色
3 是否隐藏分页控制器
4 图片切换时间设置
5 是否自动轮播
主要代码
初始化创建
- (instancetype)initWithFrame:(CGRect)frame
collectionViewLayout: (UICollectionViewLayout *)layout
imageArray:(NSArray *)imageArray
View : (UIView *)View{
if (self = [super initWithFrame:frame collectionViewLayout:layout]) {
/*! 设置代理 */
self.dataSource =self;
self.delegate =self;
/*! 默认图片滑动时间为2 */
_timeInterval = 2.0 ;
self.imageArray = imageArray;
/*! 不显示滑动条 */
self.showsHorizontalScrollIndicator = NO;
/*! 做分页处理,很重要 */
self.pagingEnabled = YES;
self.backgroundColor = [UIColor whiteColor];
/*! 滑动到指定位置 */
[self registerClass:[AJCollectionViewCell class] forCellWithReuseIdentifier:cellID];
[self scrollToItemAtIndexPath:[NSIndexPath indexPathForItem:0 inSection:1] atScrollPosition:UICollectionViewScrollPositionLeft animated:YES];
[View insertSubview:self.pageControl atIndex:5];
[self addTimer];
}
return self;
}
CollectionView代理方法实现
- (NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView{
return 3;
}
- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section{
return self.imageArray.count;
}
- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath{
AJCollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:cellID forIndexPath:indexPath];
if (!cell) {
cell = [[AJCollectionViewCell alloc]init];
}
cell.currentImage = _imageArray[indexPath.row];
/*! 实际使用过程中可以把label移除 , 避免cell上存在多余的子视图 */
cell.currentLabelStr = [NSString stringWithFormat:@"这是第%li张图片",(long)indexPath.item + 1];
return cell;
}
定时器调用方法
- (void)pageChange {
/*! 计算当前位置 */
NSIndexPath *indexpath = [self indexPathsForVisibleItems].lastObject;
NSIndexPath *currentIndexpath = [NSIndexPath indexPathForItem:indexpath.item inSection:1];
[self scrollToItemAtIndexPath:currentIndexpath atScrollPosition:UICollectionViewScrollPositionLeft animated:NO];
NSInteger nextItem = currentIndexpath.item + 1 ;
NSInteger nextSection = 1 ;
/*! 如果为最后一个图片 */
if (nextItem==self.imageArray.count) {
nextItem=0;
nextSection++;
}
[self scrollToItemAtIndexPath:[NSIndexPath indexPathForItem:nextItem inSection:nextSection] atScrollPosition:UICollectionViewScrollPositionLeft animated:YES];
}
属性的重写
- (void)setPageTintColor:(UIColor *)pageTintColor{
_pageControl.pageIndicatorTintColor = pageTintColor;
}
- (UIColor *)pageTintColor{
return _pageControl.pageIndicatorTintColor;
}
- (void)setCurrentPageColor:(UIColor *)currentPageColor{
_pageControl.currentPageIndicatorTintColor = currentPageColor;
}
- (UIColor *)currentPageColor{
return _pageControl.currentPageIndicatorTintColor;
}
- (void)setHiddenPageCtr:(BOOL)hiddenPageCtr{
_pageControl.hidden = hiddenPageCtr;
}
- (void)setDuration:(NSTimeInterval)duration{
[self removeTimer];
_timeInterval = duration;
[self addTimer];
}
- (NSTimeInterval)duration{
return _timeInterval;
}
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