ios的collectionView区头设置
直接上代码了:
#import "PhotoWallCell.h"
#import "ViewController.h"
#define kScreenWidth [UIScreen mainScreen].bounds.size.width
#define kScreenHeight [UIScreen mainScreen].bounds.size.height
static NSString *collectionCellIndentider = @"collectionCellIndentider";
@interface ViewController ()
@property(nonatomic,weak)UICollectionView*collectionView;
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
[self.view addSubview:self.collectionView];
}
- (UICollectionView *)collectionView{
if (_collectionView) {
return _collectionView;
}
CGFloat collectionViewHeight = kScreenHeight - 190;
CGRect frame = CGRectMake(0, 150, kScreenWidth, collectionViewHeight);
UICollectionViewFlowLayout *layout = [[UICollectionViewFlowLayout alloc] init];
//设置区头的大小
layout.headerReferenceSize = CGSizeMake(320, 30);
//设置item大小
layout.itemSize =CGSizeMake(100, 100);
//设置区边间距
layout.sectionInset = UIEdgeInsetsMake(10, 10, 10, 10);
//设置最小间距
[layout setMinimumInteritemSpacing:10.0f];
[layout setMinimumLineSpacing:10.0f];
UICollectionView *collectionView = [[UICollectionView alloc] initWithFrame:frame collectionViewLayout:layout];
collectionView.opaque = NO;
collectionView.backgroundColor = self.view.backgroundColor;
collectionView.dataSource = self;
collectionView.delegate = self;
collectionView.pagingEnabled = YES;
collectionView.showsVerticalScrollIndicator = NO;
collectionView.showsHorizontalScrollIndicator = NO;
[self.view addSubview:collectionView];
_collectionView = collectionView;
/*!
* @brief 注册cell
*/
[collectionView registerClass:[PhotoWallCell class] forCellWithReuseIdentifier:collectionCellIndentider];
[collectionView registerClass:[PhotoWallCell class] forSupplementaryViewOfKind:UICollectionElementKindSectionHeader withReuseIdentifier:collectionCellIndentider];
return collectionView;
}
#pragma mark -
#pragma mark -cell Delegate
- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath{
PhotoWallCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:collectionCellIndentider forIndexPath:indexPath];
cell.backgroundColor =[UIColor yellowColor];
return cell;
}
- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath
{
NSLog(@"你点击了");
}
- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section{
return 6;
}
- (NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView{
return 3;
}
//设置session区头内容
- (UICollectionReusableView *)collectionView:(UICollectionView *)collectionView viewForSupplementaryElementOfKind:(NSString *)kind atIndexPath:(NSIndexPath *)indexPath{
UICollectionReusableView *reusableview = nil;
if (kind == UICollectionElementKindSectionHeader){
UICollectionReusableView *headerView = [collectionView dequeueReusableSupplementaryViewOfKind:UICollectionElementKindSectionHeader withReuseIdentifier:collectionCellIndentider forIndexPath:indexPath];
headerView.backgroundColor = [UIColor redColor];
//把想添加的控件放在session区头重用的cell里,并且回来赋值,防止重用(重点!!!!!)
UILabel *ttLabel = (UILabel *)[headerView viewWithTag:111];
SelectTypeM*mm =_allDate[indexPath.section];
ttLabel.text =mm.proportyName;
reusableview = headerView;
}
return reusableview;
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
