Swift3 在collectionview单元格之间切换焦点时尝试更新UI元素
我希望有人能帮我解决这个问题。以下是我的tvOS应用程序截图: 资料来源: 我试图做两件事: 当用户向下滚动遥控器时,collectionView中的第二项将自动聚焦。我需要它,这样第一个项目是重点 当用户手动在collectionView中的项目之间切换焦点时,我希望屏幕中间部分的UI元素得到更新,而不必单独按下或选择它们 以下是迄今为止我在此屏幕上的代码:Swift3 在collectionview单元格之间切换焦点时尝试更新UI元素,swift3,tvos,Swift3,Tvos,我希望有人能帮我解决这个问题。以下是我的tvOS应用程序截图: 资料来源: 我试图做两件事: 当用户向下滚动遥控器时,collectionView中的第二项将自动聚焦。我需要它,这样第一个项目是重点 当用户手动在collectionView中的项目之间切换焦点时,我希望屏幕中间部分的UI元素得到更新,而不必单独按下或选择它们 以下是迄今为止我在此屏幕上的代码: import UIKit // Global variable internal let g_CR1 = "channel_cel
import UIKit
// Global variable
internal let g_CR1 = "channel_cell_01"
class DashboardVC: UIViewController, UICollectionViewDataSource, UICollectionViewDelegate {
// outlets
@IBOutlet weak var collectionView: UICollectionView!
@IBOutlet weak var lblChannelName: UILabel!
@IBOutlet weak var imgChannelLogo: UIImageView!
@IBOutlet weak var txtChannelDescription: UITextView!
// variables
var staticData: [Channel] = []
override func viewDidLoad() {
super.viewDidLoad()
// sample channels
initializeSampleData()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
// MARK: - CollectionView Callbacks
func numberOfSections(in collectionView: UICollectionView) -> Int {
return 1
}
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return staticData.count
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
// Get or make a cell
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: g_CR1, for: indexPath) as! CollectionViewCell
// Configure
cell.imgView.backgroundColor = UIColor.black
cell.imgView.image = staticData[indexPath.row].chLogo
// Return.
return cell
}
func collectionView(_ collectionView: UICollectionView, shouldSelectItemAt indexPath: IndexPath) -> Bool {
return true
}
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
let currentChannel = staticData[indexPath.row]
DispatchQueue.main.async {
self.lblChannelName.text = currentChannel.chName
self.imgChannelLogo.image = currentChannel.chLogo
self.txtChannelDescription.text = currentChannel.chDescription
}
}
}
我能够回答第二点。希望有人能从中受益。然而,我仍然被踩在1
func collectionView(_ collectionView: UICollectionView, didUpdateFocusIn context: UICollectionViewFocusUpdateContext, with coordinator: UIFocusAnimationCoordinator) {
// test
print("Previous Focused Path: \(context.previouslyFocusedIndexPath)")
print("Next Focused Path: \(context.nextFocusedIndexPath)")
let currentChannel = staticData[(context.nextFocusedIndexPath?[1])!]
DispatchQueue.main.async {
self.lblChannelName.text = currentChannel.chName
self.imgChannelLogo.image = currentChannel.chLogo
self.txtChannelDescription.text = currentChannel.chDescription
}
}