UICollectionView创建 xib

最新推荐文章于 2024-09-23 15:30:12 发布

ziyujie1991

最新推荐文章于 2024-09-23 15:30:12 发布

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文章标签： UICollectionView xib UICollectionReusable

本文链接：https://blog.youkuaiyun.com/ziyujie1991/article/details/49887985

本文详细介绍了如何使用XIB创建UICollectionView，并通过代理与布局实现细胞与头部视图的注册与配置。

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1.首先xib创建UICollectionView，设置代理

2.xib 创建以UICollectionViewCell为基类的类SortView3Cell,作为cell

3.xib 创建以UICollectionReusableView为基类的类SoryHeaderView,作为header

4.代码如下

#import "SortView3Cell.h"

#import "SoryHeaderView.h"

#define WIDTH ([UIScreen mainScreen].bounds.size.width)

__weak IBOutlet UICollectionView *_collectionView;

- (void)viewDidLoad

{ //注册cell

[_collectionView registerNib:[UINib nibWithNibName:@"SortView3Cell" bundle:nil] forCellWithReuseIdentifier:@"SortView3Cell"];

//注册header(或fooder 不需要的可以不用)

[_collectionView registerNib:[UINib nibWithNibName:@"SoryHeaderView" bundle:nil] forSupplementaryViewOfKind:UICollectionElementKindSectionHeader withReuseIdentifier:@"SoryHeaderView"];

UICollectionViewFlowLayout *layOut = [[UICollectionViewFlowLayout alloc] init];

//cell大小设置

layOut.itemSize = CGSizeMake( (WIDTH - 82)/3, 30);

//header大小设置

layOut.headerReferenceSize = CGSizeMake( WIDTH - 82, 30);

//cell横向之间的间隔，此属性如果不设置，itemSize设置cell之间一定会有间隔

layOut.minimumInteritemSpacing = 0.0;

//cell竖向之间的距离

layOut.minimumLineSpacing = 0.0;

//section的边距

//layOut.sectionInset = UIEdgeInsetsMake(5, 0, 5, 0);

_collectionView.collectionViewLayout = layOut;

}

#pragma mark - UICollectionViewDataSource

//Section个数

- (NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView

{

return 4;

}

//cell数量

- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section

{

return 9;

}

//cell创建

- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath

{

SortView3Cell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"SortView3Cell" forIndexPath:indexPath];

return cell;

}

//header 或fooder创建

- (UICollectionReusableView *)collectionView:(UICollectionView *)collectionView viewForSupplementaryElementOfKind:(NSString *)kind atIndexPath:(NSIndexPath *)indexPath

{

SoryHeaderView *headerView = [collectionView dequeueReusableSupplementaryViewOfKind:UICollectionElementKindSectionHeader withReuseIdentifier:@"SoryHeaderView" forIndexPath:indexPath];

return headerView;

}

#pragma mark - UICollectionViewDelegate

//Collection点击事件

- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath

{

}

-(BOOL)collectionView:(UICollectionView *)collectionView shouldSelectItemAtIndexPath:(NSIndexPath *)indexPath

{ //点击事件响应，这个要设为YES

return YES;

}

#pragma mark - UICollectionViewDelegateFlowLayout

//这几个函数与上面viewDidLoad里几个重合，可不设

//cell大小设置

- (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath;

//section的边距

- (UIEdgeInsets)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout insetForSectionAtIndex:(NSInteger)section;

//cell竖向之间的距离

- (CGFloat)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout minimumLineSpacingForSectionAtIndex:(NSInteger)section;

//cell横向之间的间隔

- (CGFloat)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout minimumInteritemSpacingForSectionAtIndex:(NSInteger)section;

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