2017-10-09 14:07:57.204040+0800[10448:1222328] The relevant UICollectionViewFlowLayout instance is <UICollectionViewFlowLayout: 0x7fec1d71c860>, and it is attached to <UICollectionView: 0x7fec1f09ac00; frame = (0 0; 414 165.667); clipsToBounds = YES; gestureRecognizers = <NSArray: 0x60400024bdf0>; layer = <CALayer: 0x60400023aba0>; contentOffset: {414, 0}; contentSize: {207000, 165.66666666666663}; adjustedContentInset: {1.4210854715202004e-14, 0, 0, 0}> collection view layout: <UICollectionViewFlowLayout: 0x7fec1d71c860>.
2017-10-09 14:07:57.204131+0800[10448:1222328] Make a symbolic breakpoint at UICollectionViewFlowLayoutBreakForInvalidSizes to catch this in the debugger.
2017-10-09 14:08:03.358997+0800[10448:1222328] The behavior of the UICollectionViewFlowLayout is not defined because:
2017-10-09 14:08:03.359166+0800[10448:1222328] the item height must be less than the height of the UICollectionView minus the section insets top and bottom values, minus the content insets top and bottom values.