.m
#import "LYWCollectionViewCell.h"
@implementation LYWCollectionViewCell
- (instancetype)initWithFrame:(CGRect)frame{
if (self == [super initWithFrame:frame]) {
_dateLable = [[UILabel alloc] initWithFrame:self.bounds];
[_dateLable setTextAlignment:NSTextAlignmentCenter];
[_dateLable setFont:[UIFont systemFontOfSize:17]];
_dateLable.textColor = [UIColor blackColor];
[self addSubview:_dateLable];
}
return self;
}
@end
接着代理
//cell大小及间距
- (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath{
return CGSizeMake(ScreenWidth/7, ScreenWidth/7);
}
- (UIEdgeInsets)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout insetForSectionAtIndex:(NSInteger)section{
return UIEdgeInsetsMake(0, 0, 0, 0);
}
既然有日历,总得显示哪年哪月吧,前面已经注册表头视图了,这里只需要实现以下代理方法即可
collectionView有点不同其头视图也有单独的类,和cell一样先自定义headCell,也是非常简单的自定义
.h文件
#import <UIKit/UIKit.h>
@interface LYWCollectionReusableView : UICollectionReusableView
@property (nonatomic,strong) UILabel *dateLable;
- (instancetype)initWithFrame:(CGRect)frame;
@end
.m文件
#import "LYWCollectionReusableView.h"
@implementation LYWCollectionReusableView
- (instancetype)initWithFrame:(CGRect)frame{
if (self == [super initWithFrame:frame]) {
_dateLable = [[UILabel alloc] initWithFrame:self.bounds];
[_dateLable setTextAlignment:NSTextAlignmentLeft];
[_dateLable setFont:[UIFont systemFontOfSize:20]];
_dateLable.textColor = [UIColor blackColor];
[self addSubview:_dateLable];
}
return self;
}
@end
接着代理方法,这里也有个三项判断式,和上面的大同小异,主要是防止12月显示为0月
- (UICollectionReusableView *)collectionView:(UICollectionView *)collectionView viewForSupplementaryElementOfKind:(NSString *)kind atIndexPath:(NSIndexPath *)indexPath{
if (kind == UICollectionElementKindSectionHeader) {
LYWCollectionReusableView *headerRV = [collectionView dequeueReusableSupplementaryViewOfKind:kind withReuseIdentifier:headerID forIndexPath:indexPath];
//自定义蓝色
headerRV.backgroundColor = DODGER_BLUE;
NSDate *currentDate = [[NSDate alloc]init];
NSInteger year = ([currentDate month:currentDate] + indexPath.section)/12 + 2016;
NSInteger mounth = ([currentDate month:currentDate] + indexPath.section) % 12 == 0 ? 12 : ([currentDate month:currentDate] + indexPath.section)%12;
headerRV.dateLable.text = [NSString stringWithFormat:@"%ld年%ld月",year,mounth];
return headerRV;
}else{
return nil;
}
}
还是代理,处理选中效果,选中的为黄色
