[英]Swift CollectionView ReloadData Acting Weird
我有一个“收藏夹视图”和一个顶部的按钮,该按钮经过了几天的列表。 对于每一天,集合视图都应该有所不同,我会跟踪字典中的更改。 但是,每次按下按钮时,我都想重新加载数据,但是它选择的是随机单元格。 重新加载数据后,是否再次运行cellforitematindexpath; 如果不是,它到底在运行什么?
这是我的CellForItem代码:
func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCellWithReuseIdentifier("availability", forIndexPath: indexPath) as! AvailabilityCell
var tempList: [Int]
tempList = self.availability[self.days[index]]! as! [Int]
cell.timeInterval.text = timeIntervals[indexPath.row]
cell.timePeriod.text = timesForIntervals[indexPath.row]
cell.timeInterval.textColor = DARK_BLUE
cell.timePeriod.textColor = DARK_BLUE
cell.backView.layer.cornerRadius = 10
cell.backView.layer.masksToBounds = true
cell.backView.layer.borderColor = DARK_BLUE.CGColor
cell.backView.layer.borderWidth = 1
cell.selected = false
if (tempList[indexPath.row] == 1) {
cell.timeInterval.textColor = UIColor.whiteColor()
cell.backView.backgroundColor = DARK_BLUE
cell.timePeriod.textColor = UIColor.whiteColor()
}
return cell
}
这是我的单元格已选择/取消选择:
func collectionView(collectionView: UICollectionView, didSelectItemAtIndexPath indexPath: NSIndexPath) {
let cell = collectionView.cellForItemAtIndexPath(indexPath) as! AvailabilityCell
cell.timeInterval.textColor = UIColor.whiteColor()
cell.backView.backgroundColor = DARK_BLUE
cell.timePeriod.textColor = UIColor.whiteColor()
var tempList: [Int]
tempList = self.availability[self.days[index]]! as! [Int]
tempList[indexPath.row] = 1
self.availability[self.days[index]] = tempList
}
func collectionView(collectionView: UICollectionView, didDeselectItemAtIndexPath indexPath: NSIndexPath) {
let cell = collectionView.cellForItemAtIndexPath(indexPath) as! AvailabilityCell
cell.timeInterval.textColor = DARK_BLUE
cell.backView.backgroundColor = UIColor.whiteColor()
cell.timePeriod.textColor = DARK_BLUE
var tempList: [Int]
tempList = self.availability[self.days[index]]! as! [Int]
tempList[indexPath.row] = 0
self.availability[self.days[index]] = tempList
}
这是重新加载数据的位置:
@IBAction func decreaseDay(sender: AnyObject) {
index--
day.text = days[index]
dispatch_async(dispatch_get_main_queue()) {
self.timeCollection.reloadData()
}
if (index == 0) {
back.enabled = false
}
forward.enabled = true
}
我相信您应该更改swift collection视图以重新加载左上角的页面。 重新加载数据以选择下载列表中最优先的项目。 希望这可以帮助!
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