iOS collectionView Section Header 设置

#import "Cell.h"

static NSString *ident = @"Cell";

#import "HeaderCollectionReusableView.h"

static NSString *head = @"HeaderCollectionReusableView";

    



- (void)viewDidLoad {

    [super viewDidLoad];

    // Do any additional setup after loading the view, typically from a nib.



    

    [_collectionView registerNib:[UINib nibWithNibName:ident bundle:nil] forCellWithReuseIdentifier:ident];

    

    [_collectionView registerClass:[HeaderCollectionReusableView class] forSupplementaryViewOfKind:UICollectionElementKindSectionHeader withReuseIdentifier:head];

    

    

    _arr=@[@"111",@"222",@"111",@"222",@"111",@"222",@"111",@"222",@"111",@"222",@"111",@"222",@"111",@"222"].mutableCopy;



}







#pragma mark ————————— 分区个数 —————————————

- (NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView{

    

    return _arr.count;

}





#pragma mark ————————— Header的大小 size —————————————

- (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout referenceSizeForHeaderInSection:(NSInteger)section{

    return CGSizeMake(self.view.frame.size.width, 30);

}



#pragma mark ————————— 自定义分区头  —————————————

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

    UICollectionReusableView *reusableview = nil;

    if (kind == UICollectionElementKindSectionHeader){

        HeaderCollectionReusableView *headerView = [collectionView dequeueReusableSupplementaryViewOfKind:UICollectionElementKindSectionHeader withReuseIdentifier:head forIndexPath:indexPath];

        [headerView getSHCollectionReusableViewHearderTitle:_arr[indexPath.section]];

        

        headerView.titleLabel.textColor = [UIColor grayColor];

        reusableview = headerView;

        

    }

    return reusableview;

    

}



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

    return 10;

}



// The cell that is returned must be retrieved from a call to -dequeueReusableCellWithReuseIdentifier:forIndexPath:

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

    

    Cell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:ident forIndexPath:indexPath];

    

    return cell;

    

}





#import 



@interface HeaderCollectionReusableView : UICollectionReusableView



@property (nonatomic,strong)UILabel *titleLabel;

/**

 *   声明相应的数据模型属性,进行赋值操作,获取头视图或尾视图需要的数据.或者提供一个方法获取需要的数据.

 */



-(void)getSHCollectionReusableViewHearderTitle:(NSString *)title;



@end







#import "HeaderCollectionReusableView.h"



@implementation HeaderCollectionReusableView







-(id)initWithFrame:(CGRect)frame{

    self=[super initWithFrame:frame];

    if (self) {

        [self createBasicView];

    }

    return self; 

}



/**

 *   进行基本布局操作,根据需求进行.

 */

-(void)createBasicView{

    _titleLabel = [[UILabel alloc]initWithFrame:CGRectMake(5, 0,self.frame.size.width-50, self.frame.size.height)];

    _titleLabel.textColor = [UIColor whiteColor];

    [self addSubview:_titleLabel];

}



/**

 *   设置相应的数据

 *

 *   @param title

 */

-(void)getSHCollectionReusableViewHearderTitle:(NSString *)title{

    _titleLabel.text=title;

}





@end