不规则分页，如图

用

UICollectionViewFlowLayout 来做

PagingEnableLayout.h

#import <UIKit/UIKit.h>

@interface PagingEnableLayout : UICollectionViewFlowLayout

@end

PagingEnableLayout.m

#import "PagingEnableLayout.h"
#import <objc/message.h>

#define ScreenWidth [UIScreen mainScreen].bounds.size.width

@implementation PagingEnableLayout

- (void)prepareLayout{
    [super prepareLayout];
    
    
    //屏幕宽去掉中间的cell宽度的大小
    CGFloat contentInset = 40; 
    self.collectionView.decelerationRate = UIScrollViewDecelerationRateFast;
    self.collectionView.contentInset = UIEdgeInsetsMake(0, contentInset*0.5, 0, contentInset*0.5);//整个collectionView
    //interpageSpacing
    if ([self.collectionView respondsToSelector:NSSelectorFromString(@"_setInterpageSpacing:")]) {
        ((void(*)(id,SEL,CGSize))objc_msgSend)(self.collectionView,NSSelectorFromString(@"_setInterpageSpacing:"),CGSizeMake(-(contentInset-self.minimumInteritemSpacing), 0));//minimumInteritemSpacing 在xib中设置的 cell之间的间隔
    }
    if ([self.collectionView respondsToSelector:NSSelectorFromString(@"_setPagingOrigin:")]) {
        ((void(*)(id,SEL,CGPoint))objc_msgSend)(self.collectionView,NSSelectorFromString(@"_setPagingOrigin:"),CGPointMake(-contentInset*0.5, 0)); //让下一页延伸到上一页 l
    }
}

@end

使用时，设置

UICollectionViewCell的大小

- ( CGSize )collectionView:( UICollectionView *)collectionView layout:( UICollectionViewLayout *)collectionViewLayout sizeForItemAtIndexPath:( NSIndexPath *)indexPath {
  
    return CGSizeMake(([UIScreen mainScreen].bounds.size.width-40), 340);
    
}

中间的空白间隙就是这里设置的。

参考自https://github.com/abcdezg/PagingEnableLayout