1.在使用storyboard创建页面时，关联类没有使用storyboard里面添加的uicollectionview时，自己单独自定义继承uicollectioncell（使用xib时）是无法使用的，只有重写initwithframe方法才能实现重用。
2.那种给每一个cell都注册一次重用cell时，会使重用失效，会去除重用，滑动会卡顿，但是不会有数据错乱问题
3.贴一段踩完坑的代码
#import "HomePageBelowCollectionViewCell.h"
#import <UIImageView+WebCache.h>
@implementation HomePageBelowCollectionViewCell
- (instancetype)initWithFrame:(CGRect)frame
{
self = [superinitWithFrame:frame];
if (self) {
self.backImage = [[UIImageViewalloc]initWithFrame:self.contentView.bounds];
[self.contentViewaddSubview:self.backImage];
self.backImage.contentMode =UIViewContentModeScaleAspectFill;
self.clipsToBounds =YES;
}
returnself;
}
/** 封装复用代码，方便调用*/
+ (id)getHomePageBelowCollectionViewCellWithCollectionView:(UICollectionView *)cellSuperCollectionView CellInfo:(MovierDCInterfaceSvc_VDCVideoLabelEx2 *)cellInfo CellIndex:(NSIndexPath *)cellIndex ResuableStr:(NSString *)resuableStr{
if (resuableStr.length ==0) {
resuableStr = @"belowResuableStr";
[cellSuperCollectionView registerClass:[HomePageBelowCollectionViewCellclass]forCellWithReuseIdentifier:resuableStr];
}
HomePageBelowCollectionViewCell * cell = [cellSuperCollectionViewdequeueReusableCellWithReuseIdentifier:resuableStrforIndexPath:cellIndex];
[cell.backImagesd_setImageWithURL:[NSURLURLWithString:cellInfo.szThumbnail]placeholderImage:DEFAULTVIDEOTHUMAILoptions:SDWebImageRetryFailed |SDWebImageRefreshCached];
return cell;
}
@end