###一、ZJCollectionViewSummary的由来git
项目对collectionView使用率较高,就花费了两周的业余时间对CollectionView进行了总结,并起名为ZJCollectionViewSummary发布到了Github上了,感受有用就给个星吧。github
###二、ZJCollectionViewSummary的功能数组
####基础用法总结(比较简单,只是代码实现、看代码便可)网络
- 一、给CollectionView添加headerView
- 二、给CollectionView添加/删除cell以及添加section
- 三、CollectionView中cell 的多选
####进阶用法(抽取出了框架)框架
- 一、实现图片轮播
- 二、CollectionView给添加右边索引
- 三、CollectionView长安拖动cell从新排序
- 四、常见的几种布局,包括水平/竖直滑动缩放、水平/竖直流水布局、环形布局、网格布局。(后两种事网上常见的就拿来了)。
###三、各功能的示意图、介绍以及相关用法布局
####3.一、基础用法:都是UI层面或是处理数据刷新界面ui
3.1.一、给CollectionView添加headerViewatom
设置url
layout.headerReferenceSize = CGSizeMake(SCREEN_WIDTH, 120);
直接将headerView添加到collectionView就可实现。即:.net
[_collectionView addSubview:self.headerView];
也能够实现代理分组的形式实现添加headerView.若只有一组这是比较好使的代码简单,有利于查看。
####3.1.二、给CollectionView添加/删除cell以及添加section
都是操做数组刷新界面。没什么的。
3.1.三、CollectionView中cell 的多选
思路:建立两个数组,一个是数据源_listArray,一个用做保存选中数据selectedArray。只有全选或非全选才刷新界面,点选只刷新当前cell。
核心代码:
ZJMultiSelectCollectionViewCell *cell = (ZJMultiSelectCollectionViewCell *)[_collectionView cellForItemAtIndexPath:indexPath]; NSDictionary *dict = _listArray[indexPath.row]; if ([self.selectedArray containsObject:dict]) { [self.selectedArray removeObject:dict]; cell.markV.image = [UIImage imageNamed:@"unselected_icon"]; }else{ [self.selectedArray addObject:dict]; cell.markV.image = [UIImage imageNamed:@"select_Icon"]; } if (self.selectedArray.count < self.listArray.count) { self.isSelectAll = NO;//是否全选。 [self.selectButton setImage:[UIImage imageNamed:@"unselected_icon"] forState:UIControlStateNormal]; }
###3.二、进阶用法
####3.2.一、实现图片轮播
ZJCycleView可显示本地图片,也能够是网络图片,还能够本地图片与网络图片混合现实。样式如图。相关属性和方法。
[@class](https://my.oschina.net/liwenlong7758) ZJCycleView; [@protocol](https://my.oschina.net/u/819710) ZJCycleViewDelegate <NSObject> @optional /** 点击图片回调 */ - (void)cycleView:(ZJCycleView *)cycleView didSelectItemAtIndex:(NSInteger)index; @end @interface ZJCycleView : UIView @property (nonatomic, weak) id <ZJCycleViewDelegate> delegate; /** 本地图片 */ @property (nonatomic, strong) NSArray<NSString *> *images; /** 图片连接 */ @property (nonatomic, strong) NSArray<NSString *> *urlA; /** 每张图片对应要显示的文字数组 */ @property (nonatomic, strong) NSArray *titles; /** 图片和标题字典(字典结构为:@{@"imageUrl":@"",@"title":@""}) */ @property (nonatomic, strong) NSArray<NSDictionary *> *arrayD; @property (nonatomic, assign) ZJCycleViewType cycleViewType; /** 自动轮播时间间隔,默认2s */ @property (nonatomic, assign) CGFloat autoCycleTimeInterval; /** 是否显示分页控件 */ @property (nonatomic, assign) BOOL showPageControl; /** 分页控件的位置 */ @property (nonatomic, assign) ZJCyclePageContolLocation pageControlLocation; /** pageContol点的样式 */ @property (nonatomic, assign) ZJCyclePageContolStyle pageContolStyle; /** 初始化方法 @param frame 位置尺寸 @param imageUrls 须要加载的图片数组,能够是本地的,也能够是网络的图片 @param placeholderImage 占位图片 @return ZJCycleView对象 */ - (instancetype)initWithFrame:(CGRect)frame imageUrls:(NSArray <NSString *> *)imageUrls placeholderImage:(UIImage*)placeholderImage; /** 初始化方法:图片带文字说明的不显示分页控件,可是会有总数和当前页的显示:2/20 @param frame 位置尺寸 @param imageUrls 须要加载的图片数组,能够是本地的,也能够是网络的图片 @param titles 每张图片对应要显示的文字数组 @param placeholderImage 占位图片 @return ZJCycleView对象 */ - (instancetype)initWithFrame:(CGRect)frame imageUrls:(NSArray <NSString *> *)imageUrls titles:(NSArray <NSString *> *)titles placeholderImage:(UIImage*)placeholderImage; /** 初始化方法:图片带文字说明的不显示分页控件,可是会有总数和当前页的显示:2/20 @param frame 位置尺寸 @param arrayDict 是字典数组:(字典结构为:@{@"imageUrl":@"",@"title":@""})imageUrl能够是本地的,也能够是网络的图片连接 @param placeholderImage 占位图片 @return ZJCycleView对象 */ - (instancetype)initWithFrame:(CGRect)frame arrayDict:(NSArray <NSDictionary *> *)arrayDict placeholderImage:(UIImage*)placeholderImage; /** 初始化方法 @param frame 位置尺寸 @param imageUrls 须要加载的图片数组,能够是本地的,也能够是网络的图片 @param placeholderImage 占位图片 @return ZJCycleView对象 */ + (instancetype)cycleViewWithFrame:(CGRect)frame imageUrls:(NSArray <NSString *> *)imageUrls placeholderImage:(UIImage *)placeholderImage; /** 初始化方法:图片带文字说明的不显示分页控件,可是会有总数和当前页的显示:2/20 @param frame 位置尺寸 @param imageUrls 须要加载的图片数组,能够是本地的,也能够是网络的图片 @param titles 每张图片对应要显示的文字数组 @param placeholderImage 占位图片 @return ZJCycleView对象 */ + (instancetype)cycleViewWithFrame:(CGRect)frame imageUrls:(NSArray <NSString *> *)imageUrls titles:(NSArray <NSString *> *)titles placeholderImage:(UIImage*)placeholderImage; /** 初始化方法:图片带文字说明的不显示分页控件,可是会有总数和当前页的显示:2/20 @param frame 位置尺寸 @param arrayDict 是字典数组:(字典结构为:@{@"imageUrl":@"",@"title":@""})imageUrl能够是本地的,也能够是网络的图片连接 @param placeholderImage 占位图片 @return ZJCycleView对象 */ + (instancetype)cycleViewWithFrame:(CGRect)frame arrayDict:(NSArray <NSDictionary *> *)arrayDict placeholderImage:(UIImage*)placeholderImage; /** 当选中的ZJCyclePageContolStyle 是ZJCyclePageContolStyleImage, 图片类型的时候调用,若是不调用使用默认图片 @param currentImage 选中图片 @param pageImage 默认图片 */ - (void)currentImage:(UIImage *)currentImage pageImage:(UIImage *)pageImage; /** 当选中的ZJCyclePageContolStyle 不是ZJCyclePageContolStyleImage,若是不使用默认颜色,能够调用此方法设置 @param currentColor 选中颜色 @param pageColor 默认颜色 */ -(void)currentColor:(UIColor *)currentColor pageColor:(UIColor *)pageColor;
###3.2.二、CollectionView给添加右边索引
核心代码:
- (ZJCollectionViewRightIndex *)collectionViewIndex { if (_collectionViewIndex == nil) { _collectionViewIndex = [[ZJCollectionViewRightIndex alloc] initWithFrame:CGRectMake(SCREEN_WIDTH - 20, 0, 20, SCREEN_HEIGHT)]; _collectionViewIndex.titleIndexes = self.listArray; _collectionViewIndex.color = [UIColor blackColor]; _collectionViewIndex.isSelectVisible = YES; CGRect rect = _collectionViewIndex.frame; rect.size.height = _collectionViewIndex.titleIndexes.count * 16; rect.origin.y = (SCREEN_HEIGHT - rect.size.height) / 2 + 64; _collectionViewIndex.frame = rect; _collectionViewIndex.collectionDelegate = self; } return _collectionViewIndex; } #pragma mark- ZJCollectionViewRightIndexDelegate -(void)collectionViewIndex:(ZJCollectionViewRightIndex *)collectionViewIndex didselectionAtIndex:(NSInteger)index withTitle:(NSString *)title{ if ([_collectionView numberOfSections]>index&&index>-1) { UICollectionViewLayoutAttributes *attributes = [_collectionView layoutAttributesForItemAtIndexPath:[NSIndexPath indexPathForRow:0 inSection:index]]; CGRect rect = attributes.frame; [_collectionView setContentOffset:CGPointMake(_collectionView.frame.origin.x, rect.origin.y - 40) animated:YES]; } }
###3.2.三、CollectionView长安拖动cell从新排序
主要代码:
ZJReorderFlowLayout *layout = [[ZJReorderFlowLayout alloc] init]; CGFloat cellWidth = (SCREEN_WIDTH - 20) / 3.0; layout.itemSize = CGSizeMake(cellWidth, 145); _collectionView = [[UICollectionView alloc] initWithFrame:size collectionViewLayout:layout]; #pragma mark - ZJReorderCollectionViewDataSource methods - (void)collectionView:(UICollectionView *)collectionView itemAtIndexPath:(NSIndexPath *)fromIndexPath willMoveToIndexPath:(NSIndexPath *)toIndexPath { NSDictionary *dict = self.listArray[fromIndexPath.item]; [self.listArray removeObjectAtIndex:fromIndexPath.item]; [self.listArray insertObject:dict atIndex:toIndexPath.item]; } - (BOOL)collectionView:(UICollectionView *)collectionView canMoveItemAtIndexPath:(NSIndexPath *)indexPath { return YES; } - (BOOL)collectionView:(UICollectionView *)collectionView itemAtIndexPath:(NSIndexPath *)fromIndexPath canMoveToIndexPath:(NSIndexPath *)toIndexPath { return YES; } #pragma mark - ZJReorderCollectionViewDelegateFlowLayout methods - (void)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout willBeginDraggingItemAtIndexPath:(NSIndexPath *)indexPath { NSLog(@"将开始拖动"); } - (void)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout didBeginDraggingItemAtIndexPath:(NSIndexPath *)indexPath { NSLog(@"开始拖动完成"); } - (void)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout willEndDraggingItemAtIndexPath:(NSIndexPath *)indexPath { NSLog(@"将拖动完成"); } - (void)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout didEndDraggingItemAtIndexPath:(NSIndexPath *)indexPath { NSLog(@"拖动完成"); }
###3.2.四、常见的几种布局,包括水平/竖直华东缩小、水平/竖直流水布局、
####A、水平/竖滑动缩小
self.currentIndex = 0; if (self.layout.lineDirection == ZJWaterHorizontal) { self.layout.lineDirection = ZJWaterVertical; [self.collectionView setCollectionViewLayout:self.layout animated:YES]; } else { self.layout.lineDirection = ZJWaterHorizontal; [self.collectionView setCollectionViewLayout:self.layout animated:YES]; } [self.collectionView reloadData];
####B、水平/竖直流水布局
typedef NS_ENUM(NSInteger, ZJWaterDirection) { ZJWaterVertical,//竖直方向布局 ZJWaterHorizontal//水平方向布局 }; @protocol ZJWaterLayoutDelegate <NSObject> @required /** 宽高转换:ZJWaterVertical根据宽算高,ZJWaterHorizontal根据高算宽 */ - (CGFloat)waterFlowLayout:(ZJWaterLayout *)layout hieghtForItemAtIndex:(NSUInteger)index itemwidth:(CGFloat)itemwidth; @optional /** 列数 */ - (NSInteger)waterFlowLayoutColumnCount:(ZJWaterLayout *)layout; /** 列间距 */ - (CGFloat)waterFlowLayoutColumnSpacing:(ZJWaterLayout *)layout; /** 行间距 */ - (CGFloat)waterFlowLayoutRowSpacing:(ZJWaterLayout *)layout; /** 边距 */ - (UIEdgeInsets)waterFlowLayoutEdgeInsets:(ZJWaterLayout *)layout; @end @interface ZJWaterLayout : UICollectionViewLayout /** 代理 */ @property (nonatomic,weak) id <ZJWaterLayoutDelegate> delegate; /** 布局方向 */ @property (nonatomic, assign) ZJWaterDirection waterDirection; @end