我正在以編程方式創建UICollectionView
。UICollectionViewCell未出現
作爲一個聲明,我跟着這個教程:http://randexdev.com/2014/07/uicollectionview/
所以我的設置如下:
我有與由ViewControllerA
控制的UIScrollView
故事板。
在一個單獨的類CustomCollectionViewController
我有以下代碼:
import Foundation
import UIKit
class CustomCollectionViewController : UICollectionViewController, UICollectionViewDelegateFlowLayout {
override init(nibName nibNameOrNil: String?, bundle nibBundleOrNil: NSBundle?) {
let layout: UICollectionViewFlowLayout = UICollectionViewFlowLayout()
layout.sectionInset = UIEdgeInsets(top: 20, left: 10, bottom: 10, right: 10)
layout.itemSize = CGSize(width: 90, height: 120)
super.init(collectionViewLayout: layout)
collectionView = UICollectionView(frame: self.view.frame, collectionViewLayout: layout)
//collectionView = UICollectionView(frame: CGRectMake(0, 0, 500, 500), collectionViewLayout: layout)
collectionView!.dataSource = self
collectionView!.delegate = self
collectionView!.backgroundColor = UIColor.redColor()
collectionView!.registerClass(UICollectionViewCell.self, forCellWithReuseIdentifier: "Cell")
self.view.addSubview(collectionView!)
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
override func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return 14
}
override func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCellWithReuseIdentifier("Cell", forIndexPath: indexPath)
cell.backgroundColor = UIColor.greenColor()
return cell
}
}
在我ViewControllerA
我有這樣的代碼
let collectionViewController: CustomCollectionViewController = CustomCollectionViewController(nibName: nil, bundle: nil)
collectionViewController.view.frame.origin = CGPointMake(scrollViewWidth*3, 0)
scrollView.addSubview(collectionViewController.view)
如果在模擬器中運行,我可以看到的紅色背景UICollectionView
,但沒有任何細胞。
任何提示我做錯了什麼?
你可以設置你的CollectionView斷點:cellForItemAtIndexPath:功能,看看它是否被調用? – dirkgroten
@dirkgroten我已經做了。它被稱爲。 – Phytochrome