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[英]Get index of clicked UICollectionViewCell in UICollectionView Swift
[英]Swift get current displayed index UICollectionView
我正在為iOS做音樂播放器。 我有音樂列表和詳細視圖,您可以左右滑動來更改歌曲。 問題是我無法使當前顯示的元素播放適當的歌曲,但是顯示的圖像很好。 我想知道如何在“輪播視圖”中獲取當前元素,因為cellForItemAt不起作用,當我向右滑動時,它會給我2個下一個索引。
import UIKit
import AVFoundation
private let reuseIdentifier = "Cell"
class PhotoCarouselCollectionViewController: UIViewController, UICollectionViewDelegate, UICollectionViewDataSource {
@IBOutlet var collectionView: UICollectionView!
@IBAction func pause(_ sender: Any) {
if audioPlayer.isPlaying == true{
audioPlayer.pause()
}
}
@IBAction func play(_ sender: Any) {
if audioPlayer.isPlaying == false{
audioPlayer.play()
}
}
@IBAction func slider(_ sender: UISlider) {
audioPlayer.volume = sender.value
}
private var photoSet = [
Photo(name: "pendulum", song: "pendulum"),
Photo(name: "martin", song: "doitright"),
Photo(name: "kungs",song: "thisgirl"),
Photo(name: "future",song: "future"),
]
var photo: Photo?
var currentPhoto: Int?
let scrollView = UICollectionView.self
var pageControl : UIPageControl = UIPageControl(frame: CGRect(x:50,y: 300, width:200, height:50))
override func viewDidLoad() {
super.viewDidLoad()
let swipeRight = UISwipeGestureRecognizer(target: self, action: Selector(("respondToSwipeGesture:")))
swipeRight.direction = UISwipeGestureRecognizerDirection.right
self.view.addGestureRecognizer(swipeRight)
let swipeLeft = UISwipeGestureRecognizer(target: self, action: Selector(("respondToSwipeGesture:")))
swipeLeft.direction = UISwipeGestureRecognizerDirection.left
self.view.addGestureRecognizer(swipeLeft)
}
func respondToSwipeGesture(gesture: UIGestureRecognizer) {
if let swipeGesture = gesture as? UISwipeGestureRecognizer {
switch swipeGesture.direction {
case UISwipeGestureRecognizerDirection.right:
print("Swiped right")
case UISwipeGestureRecognizerDirection.down:
print("Swiped down")
case UISwipeGestureRecognizerDirection.left:
print("Swiped left")
case UISwipeGestureRecognizerDirection.up:
print("Swiped up")
default:
break
}
}
//pageControl.currentPage = {currentPhoto!}();
// Uncomment the following line to preserve selection between presentations
// self.clearsSelectionOnViewWillAppear = false
// Register cell classes
// self.collectionView!.register(PhotoCarouselCollectionViewCell.self, forCellWithReuseIdentifier: reuseIdentifier)
// Do any additional setup after loading the view.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func numberOfSections(in collectionView: UICollectionView) -> Int {
// #warning Incomplete implementation, return the number of sections
return 1
}
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
// #warning Incomplete implementation, return the number of items
return photoSet.count
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: reuseIdentifier, for: indexPath) as! PhotoCarouselCollectionViewCell
// Configure the cell
let photo = photoSet[indexPath.row.advanced(by: currentPhoto!)]
print(indexPath.row)
//let photo = photoSet[currentPhoto!]
//let photo = photoSet[indexPath.row]\
//GETTING THE MUSIC TO BE PLAYED
do{
let audioPath = Bundle.main.path(forResource: photoSet[indexPath.row].song, ofType: "mp3")
try audioPlayer = AVAudioPlayer(contentsOf: NSURL(fileURLWithPath: audioPath!) as URL)
audioPlayer.play()
}
catch{
print ("ERROR")
}
cell.imageView.image = UIImage(named: photo.name)
return cell
}
func scrollViewDidEndDecelerating(_ scrollView: UIScrollView) {
}
}
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