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collectionView用法和我们常用的UITableview用法差不多，两个代理
<UICollectionViewDataSource,UICollectionViewDelegate>
下面就是关于UIcollectionView的使用
首先我们创建一个UICollectionViewCell，初始化
@implementation CollectionViewCell
-(instancetype)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
[self createViewCell];
}
return self;
}
- (void)createViewCell
{
self.label = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 60, 60)];
self.label.backgroundColor = [UIColor greenColor];
[self addSubview:self.label];
}
@end
然后再Viewcontroller中初始化UIcollectionView，添加代理方法
UICollectionViewFlowLayout *view = [[UICollectionViewFlowLayout alloc] init];
view.itemSize = CGSizeMake(60, 60);
//列编剧
view.minimumInteritemSpacing = 30;
//行间距
view.minimumLineSpacing = 10;
//header区大小
// view.headerReferenceSize = CGSizeMake(100, 100);
//底部区域大小
// view.footerReferenceSize = CGSizeMake(100, 100);
//滚动方向
view.scrollDirection = UICollectionViewScrollDirectionVertical;
//item与周围边缘的间距
view.sectionInset = UIEdgeInsetsMake(20, 22, 20, 22);
UICollectionView *cv = [[UICollectionView alloc] initWithFrame:[[UIScreen mainScreen] bounds] collectionViewLayout:view];
[self.view addSubview:cv];
cv.delegate = self;
cv.dataSource = self;
//注册cell
[cv registerClass:[CollectionViewCell class] forCellWithReuseIdentifier:@"cell"];
}
- (NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView
{
return 100;
}
-(NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section
{
return 20;
}
-(UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *cellID = @"cell";
CollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:cellID forIndexPath:indexPath];
cell.label.text = @"可一更牛逼";
cell.label.numberOfLines = 0;
return cell;
}
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原文地址：http://www.cnblogs.com/darain0212/p/4607453.html
