UICollectionViewFlowLayout 默认值测试

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最简单的流水布局:

在iPhone6屏幕上, 默认尺寸如下:

UICollectionViewFlowLayout *flowLayout = [[UICollectionViewFlowLayout alloc] init];

NSLog(@"%f, %f, %f, %f, %f",PJWITCH, flowLayout.itemSize.width, flowLayout.itemSize.height, flowLayout.minimumLineSpacing, flowLayout.minimumInteritemSpacing);

UICollectionView[1461:98531] 375.000000, 50.000000, 50.000000, 10.000000, 10.000000

NSLog(@"%f, %f, %f, %f", flowLayout.headerReferenceSize.width, flowLayout.headerReferenceSize.height, flowLayout.footerReferenceSize.width, flowLayout.footerReferenceSize.height);

UICollectionView[1461:98531] 0.000000, 0.000000, 0.000000, 0.000000

flowLayout.sectionInset默认全部为0.

flowLayout.scrollDirection =UICollectionViewScrollDirectionHorizontal;//每个item按照横向的方向开始摆放

flowLayout.scrollDirection =UICollectionViewScrollDirectionVertical; //每个item按照竖向的方向开始摆放

每一列的最小间距

layout.minimumInteritemSpacing = 10;

每一行的最小间距

layout.minimumLineSpacing = 10;

// 设置UICollectionViewFlowLayout与CollectionView边缘的间距

layout.sectionInset = UIEdgeInsetsMake(lineSpacing, interitemSpacing, lineSpacing, interitemSpacing);

layout.sectionInset = UIEdgeInsets(top: 0, left: kItemMargin, bottom:0, right: kItemMargin)

layout.headerReferenceSize = CGSize(width: WIDTH, height: kHeaderViewH)

colltionView.contentInset = UIEdgeInsets(top: kCycleViewH + kGameViewH, left:0, bottom: 0, right:0)

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