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func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCellWithReuseIdentifier(identifier, forIndexPath: indexPath) as! ComposeCell
cell.deletePictureSignal.subscribeNext { (response) -> Void in
print("delete picture")
let deleteIndex = (self.pictureView.indexPathForCell(cell)?.item)!
self.pictures.removeAtIndex(deleteIndex)
// self.pictureView.reloadData()
}
cell.addPictureSignal.subscribeNext { (response) -> Void in
print("add picture")
self.selectedIndex = (self.pictureView.indexPathForCell(cell)?.item)!
let imagePicker = UIImagePickerController()
imagePicker.delegate = self
self.presentViewController(imagePicker, animated: true, completion: nil)
}
return cell
}
当我reloadData,这样将再次实施,信号将被订阅很多时候,我怎么能解决这个问题,并确保订阅只有一次?ReactiveCocoa - 如何避免多认购信号的CollectionView的细胞