我有一个 UICollection，它在锁定给未登录用户的单元格上显示挂锁。用户可以查看集合，然后以模式登录。当模态消失时，我试图重新加载表格的单元格和嵌套集合以从单元格中删除挂锁。
可见单元格未刷新以移除挂锁。滚动集合时，屏幕外的单元格是正确的并显示为挂锁。我在 tableview 和每个嵌套的 collectionview 上调用 reloaddata()。
我的代码分为:
UIViewController
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("SectionWorkouts", forIndexPath: indexPath) as! SectionTableViewCell
cell.delegate = self
// Return the workouts count from the section
let intIndex = indexPath.row
let index = workoutSections.startIndex.advancedBy(intIndex)
let currentWorkoutSectionKey = workoutSections.keys[index]
if let currentWorkoutSection = workoutSections[currentWorkoutSectionKey] {
cell.workoutsCollection.dataSource = sectionWorkoutsCell
cell.workoutsCollection.delegate = sectionWorkoutsCell
cell.updateCellWithWorkouts(currentWorkoutSectionKey, workouts: currentWorkoutSection)
}
}
return cell
}
UITableViewCell
class SectionTableViewCell: UITableViewCell,UICollectionViewDelegate, UICollectionViewDataSource {
var workouts = [Workout]()
var delegate: WorkoutCellDelegate?
@IBOutlet weak var sectionTitle: UILabel!
@IBOutlet weak var workoutsCollection: UICollectionView!
func updateCellWithWorkouts(title: String, workouts: [Workout]){
self.sectionTitle.text = title
self.workouts = workouts
dispatch_async(dispatch_get_main_queue(),{
self.workoutsCollection.reloadData()
})
}
func numberOfSectionsInCollectionView(collectionView: UICollectionView) -> Int {
return 1
}
func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCellWithReuseIdentifier("SectionWorkoutCell", forIndexPath: indexPath) as! SectionCollectionViewCell
let row = indexPath.row
let workout = workouts[row]
cell.configCell(workout)
return cell
}
func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return workouts.count
}
func collectionView(collectionView: UICollectionView, didSelectItemAtIndexPath indexPath: NSIndexPath) {
let row = indexPath.row
let feature = workouts[row]
if let delegate = self.delegate{
delegate.didSelectWorkoutCell(feature)
}
}
}
UICollectionViewCell
class SectionCollectionViewCell: UICollectionViewCell {
@IBOutlet weak var imageContainer: UIView!
@IBOutlet weak var image: UIImageView!
@IBOutlet weak var tintOverlay: UIView!
@IBOutlet weak var padlock: UIImageView!
@IBOutlet weak var workoutTitle: UILabel!
@IBOutlet weak var duration: UILabel!
var locked = true
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
}
func configCell(workout: Workout){
self.workoutTitle.text = workout.name
if workout.type == "Free" || AccountManager.userIsLoggedInMember() {
self.setToUnLocked()
}else{
self.setToLocked()
}
self.layoutIfNeeded()
}
func setToUnLocked(){
locked = false
tintOverlay.alpha = 0
padlock.alpha = 0
}
func setToLocked(){
locked = true
tintOverlay.alpha = 0.6
padlock.alpha = 1
}
}
最佳答案
您可能应该将配置单元格的调用移至 willDisplayCell: 方法。您可以从 cellForItemAtIndexPath 方法中删除它。这是配置要显示的单元格的任何视觉方面的正确时间。
func collectionView(collectionView: UICollectionView,
willDisplayCell cell: UICollectionViewCell,
forItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
let row = indexPath.row
let workout = workouts[row]
cell.configCell(workout)
return cell
}
关于ios - 嵌套在 uitableviewcell 中时重新加载可见的 uicollectionviewcell，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/38884038/