视图控制器中的嵌入式UICollectionView未调用Swift
视图控制器中的嵌入式UICollectionView未调用Swift
提问于 2016-03-08 08:11:47
出于某种奇怪的原因，collectionView没有被调用。我在numberOfItemsInSection和cellForItemAtIndexPath上设置了断点，但它们从未被调用过。下面是我的代码：
class ChannelViewController: UIViewController, UISearchResultsUpdating, UICollectionViewDataSource, UICollectionViewDelegate {
var channelArray: [ChannelInfo] = []
var filteredSearchResults = [ChannelInfo]()
var resultsSearchController = UISearchController(searchResultsController: nil)
var logosShown = [Bool](count: 50, repeatedValue: false)
var detailUrl: String?
var apiKey = ""
var channel: String!
var channelForShow: String!
var task: NSURLSessionTask?
@IBOutlet var channelCollectionView: UICollectionView!
override func viewDidLoad() {
let baseURL = ""
getJSON(baseURL)
}
//MARK: CollectionView
func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
if resultsSearchController.active && resultsSearchController.searchBar.text != ""
{
return filteredSearchResults.count
} else {
return channelArray.count
}
}
func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCellWithReuseIdentifier("ChannelCell", forIndexPath: indexPath) as! ChannelCell
let channel: String
if resultsSearchController.active && resultsSearchController.searchBar.text != "" {
channel = self.filteredSearchResults[indexPath.row].logo
} else {
channel = self.channelArray[indexPath.row].logo
}
return cell
}
func collectionView(collectionView: UICollectionView, didSelectItemAtIndexPath indexPath: NSIndexPath) {
var replacedTitle: String?
if resultsSearchController.active && resultsSearchController.searchBar.text != "" {
channelForShow = filteredSearchResults[indexPath.row].channelName
}
} else {
channelForShow = self.channelArray[indexPath.row].channelName
}
}
self.dismissSearchBar()
performSegueWithIdentifier("channelCollectToShowSegue", sender: self)
}}
我还有一个collectionView单元格的子类：
class ChannelCell : UICollectionViewCell {
@IBOutlet var channelImageView: UIImageView!
}Stack Overflow用户
发布于 2016-03-08 08:19:26
您需要将集合视图的数据源设置为控制器。
1) 在接口构建器中，只需从集合视图拖动到控制器即可。并同时选择委托和数据源。
2) Programatically
override func viewDidLoad() {
super.viewDidLoad()
channelCollectionView.delegate = self
channelCollectionView.dataSource = self
let baseURL = ""
getJSON(baseURL)
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/35856630
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