2017-03-27 11:12:20.902274 DTSampleLight[1480:432147] The behavior of the UICollectionViewFlowLayout is not defined because:
2017-03-27 11:12:20.902372 DTSampleLight[1480:432147] 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.
2017-03-27 11:12:20.903319 DTSampleLight[1480:432147] The relevant UICollectionViewFlowLayout instance is <UICollectionViewFlowLayout: 0x1010c3170>, and it is attached to <UICollectionView: 0x1019c4e00; frame = (0 426; 320 78); clipsToBounds = YES; gestureRecognizers = <NSArray: 0x17425ac70>; layer = <CALayer: 0x174425780>; contentOffset: {0, 0}; contentSize: {132.74074073191042, 98}> collection view layout: <UICollectionViewFlowLayout: 0x1010c3170>.
2017-03-27 11:12:20.903366 DTSampleLight[1480:432147] Make a symbolic breakpoint at UICollectionViewFlowLayoutBreakForInvalidSizes to catch this in the debugger.
解决方法
- (void)viewWillLayoutSubviews {
[self.containerView.collectionView.collectionViewLayout invalidateLayout];
}
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