用collectionview做个了日历 宽度均分 但中间总有缝隙 应为选中需要改变背景颜色 而切背景是黑色 所以特别明显 请问有没有大神朋友过 或者有解决的思路

黑线如图所示

布局代码在此

float cellw =kDeviceWidth/7; UICollectionViewFlowLayout *flowLayout = [[UICollectionViewFlowLayout alloc]init]; [flowLayout setItemSize:CGSizeMake(cellw, cellw*4/3)];//设置cell的尺寸 [flowLayout setScrollDirection:UICollectionViewScrollDirectionVertical];//设置其布局方向 [flowLayout setHeaderReferenceSize:CGSizeMake(kDeviceWidth, 50)]; [flowLayout setMinimumInteritemSpacing:0]; //设置 y 间距 [flowLayout setMinimumLineSpacing:0]; //设置 x 间距 flowLayout.sectionInset = UIEdgeInsetsMake(0, 0, 0, 0);//设置其边界 网上找到了一个重写布局方法 但是发现会叠加 - (NSArray *) layoutAttributesForElementsInRect:(CGRect)rect { NSArray *answer = [super layoutAttributesForElementsInRect:rect]; for(int i = 1; i < [answer count]; ++i) { UICollectionViewLayoutAttributes *currentLayoutAttributes = answer[i]; UICollectionViewLayoutAttributes *prevLayoutAttributes = answer[i - 1]; NSInteger maximumSpacing = 0; NSInteger origin = CGRectGetMaxX(prevLayoutAttributes.frame); if(origin + maximumSpacing + currentLayoutAttributes.frame.size.width < self.collectionViewContentSize.width) { CGRect frame = currentLayoutAttributes.frame; frame.origin.x = origin + maximumSpacing; currentLayoutAttributes.frame = frame; } } return answer;

}

用了个土爆炸的方法有缝隙是应为屏幕款除以一行的个数除不尽 所以我只能手动算了

最后一行把前面除不尽的宽度加上去

- (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath{ float cellw ; //5 .width = 320 //6 .width = 375 //6p .wdiht = 414 if (IS_IPHONE_5) { if (indexPath.row % 7 ==0) { cellw = 47; }else{ cellw = 45.5; } }else if (IS_IPHONE_6) { if (indexPath.row % 7 ==0) { cellw = 54; }else{ cellw = 53.5; } }else if (IS_IPHONE_6P){ if (indexPath.row % 7 ==0) { cellw = 60; }else{ cellw = 59; } } return CGSizeMake(cellw, cellw*4/3); }