自定义UICollectionView的头视图或者尾视图(UICollectionReusableView)

其实看标题就知道是需要继承于UICollectionReusableView,实现一个满足自己需求的视图.那么如何操作了,看下面代码:

ViewController.m文件中#import "ViewController.h"#import "LSHControl.h"#import "SHCollectionReusableView.h"#import "SHCollectionViewCell.h"#define SHCollectionViewCellIdetifiler   @"CollectionViewCell"#define SHCollectionReusableViewHeader   @"CollectionHeader"#define SHCollectionReusableViewFooter   @"CollectionFooter"@interface ViewController ()<UICollectionViewDelegate,UICollectionViewDataSource>{    NSArray *recipeImages;    NSArray *hearderTitleArray;}@property(nonatomic,strong) UICollectionView *rightCollectionView;@end@implementation ViewController- (void)viewDidLoad {    [super viewDidLoad];    NSArray *mainDishImages = [NSArray arrayWithObjects:@"egg_benedict.jpg", @"full_breakfast.jpg", @"ham_and_cheese_panini.jpg", @"ham_and_egg_sandwich.jpg", @"hamburger.jpg", @"instant_noodle_with_egg.jpg", @"japanese_noodle_with_pork.jpg", @"mushroom_risotto.jpg", @"noodle_with_bbq_pork.jpg", @"thai_shrimp_cake.jpg", @"vegetable_curry.jpg", nil];    NSArray *drinkDessertImages = [NSArray arrayWithObjects:@"angry_birds_cake.jpg", @"creme_brelee.jpg", @"green_tea.jpg", @"starbucks_coffee.jpg", @"white_chocolate_donut.jpg", nil];    recipeImages = [NSArray arrayWithObjects:mainDishImages, drinkDessertImages, nil];    hearderTitleArray=@[@"分区1",@"分区2"];    [self createCollectionView];}-(void)createCollectionView{    UICollectionViewFlowLayout *flowLayout=[[UICollectionViewFlowLayout alloc] init];    flowLayout.minimumInteritemSpacing=0.f;//item左右间隔    flowLayout.minimumLineSpacing=5.f;//item上下间隔    flowLayout.sectionInset=UIEdgeInsetsMake(5,15,5, 15);//item对象上下左右的距离    flowLayout.itemSize=CGSizeMake(80, 80);//每一个 item 对象大小    flowLayout.scrollDirection=UICollectionViewScrollDirectionVertical;//设置滚动方向,默认垂直方向.    flowLayout.headerReferenceSize=CGSizeMake(self.view.frame.size.width, 30);//头视图的大小    flowLayout.footerReferenceSize=CGSizeMake(self.view.frame.size.width, 30);//尾视图大小    self.rightCollectionView= [LSHControl createCollectionViewFromFrame:self.view.frame collectionViewLayout:flowLayout dataSource:self delegate:self backgroudColor:[UIColor whiteColor]];    //自定义重用视图    [self.rightCollectionView registerNib:[UINib nibWithNibName:@"SHCollectionViewCell" bundle:nil] forCellWithReuseIdentifier:SHCollectionViewCellIdetifiler];    [self.rightCollectionView registerClass:[SHCollectionReusableView class] forSupplementaryViewOfKind:UICollectionElementKindSectionHeader withReuseIdentifier:SHCollectionReusableViewHeader];    //使用原有重用视图    [self.rightCollectionView registerClass:[UICollectionReusableView class]  forSupplementaryViewOfKind:UICollectionElementKindSectionFooter withReuseIdentifier:SHCollectionReusableViewFooter ];    [self.view addSubview:self.rightCollectionView];}- (NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView{    return [recipeImages count];}- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section{    return [[recipeImages objectAtIndex:section] count];}- (UICollectionReusableView *)collectionView:(UICollectionView *)collectionView viewForSupplementaryElementOfKind:(NSString *)kind atIndexPath:(NSIndexPath *)indexPath{    UICollectionReusableView *reusableview = nil;    if (kind == UICollectionElementKindSectionHeader) {        SHCollectionReusableView *headerView = [collectionView dequeueReusableSupplementaryViewOfKind:UICollectionElementKindSectionHeader withReuseIdentifier:SHCollectionReusableViewHeader forIndexPath:indexPath];        /**         *         * 注意:虽然这里没有看到明显的initWithFrame方法,但是在获取重用视图的时候,系统会自动调用initWithFrame方法的.所以在initWithFrame里面进行初始化操作,是没有问题的!         */        [headerView getSHCollectionReusableViewHearderTitle:hearderTitleArray[indexPath.section]];        reusableview = headerView;    }    if (kind == UICollectionElementKindSectionFooter) {        UICollectionReusableView *footerview = [collectionView dequeueReusableSupplementaryViewOfKind:UICollectionElementKindSectionFooter withReuseIdentifier:SHCollectionReusableViewFooter forIndexPath:indexPath];        /**         *   如果头尾视图没什么很多内容,直接创建对应控件进行添加即可,无需自定义.         */        footerview.backgroundColor=[UIColor redColor];        reusableview = footerview;    }    return reusableview;}- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath{    /**     *     *   这里自定义cell,使用xib进行布局.对于如何使用xib创建视图,不明白的,可以看我之前写的一篇文章.     */    SHCollectionViewCell *cell = (SHCollectionViewCell *)[collectionView dequeueReusableCellWithReuseIdentifier:SHCollectionViewCellIdetifiler forIndexPath:indexPath];    UIImageView *recipeImageView = (UIImageView *)[cell viewWithTag:100];    recipeImageView.image = [UIImage imageNamed:[recipeImages[indexPath.section] objectAtIndex:indexPath.row]];    cell.backgroundView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"photo-frame-2.png"]];    return cell;}@end

自定义UICollectionViewCell,使用 xib进行布局

#import <UIKit/UIKit.h>@interface SHCollectionViewCell : UICollectionViewCell@property (weak, nonatomic) IBOutlet UIImageView *recipeImageView;@end#import "SHCollectionViewCell.h"@implementation SHCollectionViewCell@end

自定义UICollectionReusableView,手写代码进行布局

#import <UIKit/UIKit.h>@interface SHCollectionReusableView : UICollectionReusableView/** *   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 "SHCollectionReusableView.h"#import "LSHControl.h"@interface SHCollectionReusableView (){    UILabel *titleLabel;}@end@implementation SHCollectionReusableView-(id)initWithFrame:(CGRect)frame{    self=[super initWithFrame:frame];    if (self) {        self.backgroundColor=[UIColor greenColor];        [self createBasicView];    }    return self;}/** *   进行基本布局操作,根据需求进行. */-(void)createBasicView{  titleLabel=[LSHControl createLabelWithFrame:CGRectMake(5, 0,self.frame.size.width-50, self.frame.size.height) Font:[UIFont systemFontOfSize:14.0] Text:@"" color:[UIColor grayColor]];  [self addSubview:titleLabel];}/** *   设置相应的数据 * *   @param title  */-(void)getSHCollectionReusableViewHearderTitle:(NSString *)title{    titleLabel.text=title;}@end

效果如下图: