收集视图顶部的奇怪间隙

Question

不确定发生了什么。这可能是iOS 8上的collectionView错误吗？顶部的黑色不应该在那里...

视图控制器代码：

class SearchViewController: UIViewController, UICollectionViewDataSource, UICollectionViewDelegate, UICollectionViewDelegateFlowLayout { 

    @IBOutlet var collectionView: UICollectionView! 

    // MARK: - VC Lifecycle 
    override func viewDidLoad() { 
     super.viewDidLoad() 

     var viewNib = UINib(nibName: "SearchFiltersCollectionReusableView", bundle: nil) 
     collectionView.registerNib(viewNib, forSupplementaryViewOfKind: UICollectionElementKindSectionHeader, withReuseIdentifier: "filter") 

     var viewNib2 = UINib(nibName: "SearchResultCollectionViewCell", bundle: nil) 
     collectionView.registerNib(viewNib2, forCellWithReuseIdentifier: "searchCell") 
     // Do any additional setup after loading the view. 
    } 

    override func didReceiveMemoryWarning() { 
     super.didReceiveMemoryWarning() 
     // Dispose of any resources that can be recreated. 
    } 

    // MARK: - CV Datasource 
    func numberOfSectionsInCollectionView(collectionView: UICollectionView!) -> Int { 
     return 2 
    } 

    func collectionView(collectionView: UICollectionView!, numberOfItemsInSection section: Int) -> Int { 

     var itemsCount = section == 1 ? 10 : 0 
     return itemsCount 
    } 

    func collectionView(collectionView: UICollectionView!, cellForItemAtIndexPath indexPath: NSIndexPath!) -> UICollectionViewCell! { 

     var cell = collectionView.dequeueReusableCellWithReuseIdentifier("searchCell", forIndexPath: indexPath) as UICollectionViewCell 

     return cell 
    } 

    // MARK: - CV Delegate 
    func collectionView(collectionView: UICollectionView!, viewForSupplementaryElementOfKind kind: String!, atIndexPath indexPath: NSIndexPath!) -> UICollectionReusableView! { 

     var section = indexPath.section 
     var identifier = indexPath.section == 0 ? "nav" : "filter" 

     var view = collectionView.dequeueReusableSupplementaryViewOfKind(UICollectionElementKindSectionHeader, withReuseIdentifier: identifier, forIndexPath: indexPath) as UICollectionReusableView 
     return view 
    } 
    // MARK: - CV DelegateFlow 
    func collectionView(collectionView: UICollectionView!, layout collectionViewLayout: UICollectionViewLayout!, sizeForItemAtIndexPath indexPath: NSIndexPath!) -> CGSize { 

     var width = collectionView.bounds.size.width 
     return CGSizeMake(width, 70) 
    } 

    func collectionView(collectionView: UICollectionView!, layout collectionViewLayout: UICollectionViewLayout!, referenceSizeForHeaderInSection section: Int) -> CGSize { 

     var width = collectionView.bounds.size.width 
     var height : CGFloat = section == 0 ? 240.0 : 70.0 

     return CGSizeMake(width, height) 
    } 


} 

Answer 1

尝试automaticallyAdjustsScrollViewInsets属性来设置视图控制器NO。