UICollection全屏时错误

the item height must be less than the height of the UICollectionView minus the section insets top and bottom values.

UIViewController的属性propertyautomaticallyAdjustsScrollViewInsets默认增加了填充，修改

    self.automaticallyAdjustsScrollViewInsets =NO;

即可按照自己设置的全屏滚动。

After a lot frusteration and time, I finally realized that the UIViewController propertyautomaticallyAdjustsScrollViewInsets is set to YES by default which affects the insets as the property name describes. The documentation for the property is the following:

automaticallyAdjustsScrollViewInsets

Specifies whether or not the view controller should automatically adjust its scroll view insets.

@property(nonatomic, assign) BOOL automaticallyAdjustsScrollViewInsets

Discussion

Default value is YES, which allows the view controller to adjust its scroll view insets in response to the screen areas consumed by the status bar, navigation bar, and toolbar or tab bar. Set to NO if you want to manage scroll view inset adjustments yourself, such as when there is more than one scroll view in the view hierarchy.

Availability

Available in iOS 7.0 and later.

Declared In

UIViewController.h

https://github.com/wessmith/FullScreenCollectionViewLineLayoutErrorExample