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問題:我無法找到我按下的哪個刪除按鈕,並將它與單元格中的視頻綁定,因此我可以在Parse上將其刪除。使用按鈕查找並從UICollectionView中刪除視頻 - Swift
我在cellForIndexAtIndexPath
self.deleteButton = UIButton(frame: CGRectMake(cell.frame.size.width/1.5, 10, 30, 30))
let deleteImage = UIImage(named: "deleteVideoButton.png")
self.deleteButton.setBackgroundImage(deleteImage, forState: .Normal)
self.deleteButton.tag = indexPath.row
self.deleteButton.addTarget(self, action: "deleteCellFromButton", forControlEvents: UIControlEvents.TouchUpInside)
cell.addSubview(self.deleteButton)
的按鈕顯示在UICollectionView每個小區顯示器上編程方式添加的按鈕。
我有一個函數,調用deleteCellFromButton()。我知道我應該使用index.path,但我不能在這個函數中調用它。
func deleteCellFromButton() {
var alert = UIAlertController(title: "Are you sure?", message: "This video will be deleted forever", preferredStyle: UIAlertControllerStyle.ActionSheet)
let confirmAction : UIAlertAction = UIAlertAction(title: "Ok!", style: .Default) { (action) -> Void in
var query = PFQuery(className: "Movie")
query.whereKey("username", equalTo: (PFUser.currentUser()?.username)!)
// here is where I think this goes query.whereKey("videoFile", equalTo: self.videoArray[index.path.row]) ???
query.findObjectsInBackgroundWithBlock { (objects: [AnyObject]?, error: NSError?) -> Void in
if error != nil {
print(error)
} else {
for object in objects! {
print(object)
object.deleteInBackgroundWithBlock({ (success: Bool, error: NSError?) -> Void in
//put after delete code stuff here.
})
}
}
}
}
let cancelAction : UIAlertAction = UIAlertAction(title: "Cancel", style: .Cancel) { (error) -> Void in
}
alert.addAction(confirmAction)
alert.addAction(cancelAction)
self.presentViewController(alert, animated: true, completion: nil)
}
確定這樣奇怪的事情。每當我添加:最後它崩潰,所以我刪除它。我打印出self.deleteButton.tag,無論哪一個我點擊它返回1.我應該將標籤存儲在數組中嗎?這是如何運作的? –
我的故障在崩潰時我沒有注意到在func上添加(按鈕:UIButton) –
也得到了上述標籤的工作原理。謝謝。我現在不得不在邏輯中將該號碼連接到我認爲的視頻陣列。 –