在indexpath处重新加载行无效

Question

在我的社交媒体应用程序我有一个喜欢的按钮…

var likers = [String]()
func like(sender: UIButton) {
    var buttonPosition: CGPoint = sender.convertPoint(CGPointZero, toView: self.table)
    var indexPath: NSIndexPath = self.table.indexPathForRowAtPoint(buttonPosition)!
    testConnection()
    var post = posts[indexPath.row]
    if sender.currentTitle == "Unlike" {
        dispatch_async(dispatch_get_main_queue()) {
            self.table.reloadRowsAtIndexPaths([indexPath], withRowAnimation: .Automatic)
        }
        sender.enabled = false
        post.removeObject(PFUser.currentUser()!.objectId!, forKey: "likers")
        post.saveInBackgroundWithBlock({ (success, error) -> Void in
            if success == true {
                sender.enabled = true
            }
            if error != nil {
                sender.enabled = true
            }
        })
    } else {
        dispatch_async(dispatch_get_main_queue()) {
            self.table.reloadRowsAtIndexPaths([indexPath], withRowAnimation: .Automatic)
        }
        sender.enabled = false
        dispatch_async(dispatch_get_main_queue()) {
            post.addUniqueObject(PFUser.currentUser()!.objectId!, forKey: "likers")
            post.saveInBackgroundWithBlock({ (success, error) -> Void in
                if success == true {
                    sender.enabled = true

                }
                if error != nil {
                    sender.enabled = true
                }
            })
        }
    }
}

出于某种原因，当我在indexPath重新加载行，喜欢的标签不改变，这也是我在cellForRowAtIndexPath设置按钮的地方…

dispatch_async(dispatch_get_main_queue()) {
            if PFUser.currentUser()?.objectId != nil {
                if (post["likers"] as! NSMutableArray).containsObject(PFUser.currentUser()!.objectId!) {
                    postCellObj.likeButton.setTitle("Unlike", forState: .Normal)
                } else {
                    postCellObj.likeButton.setTitle("Like", forState: .Normal)
                }
            } else {
                postCellObj.likeButton.setTitle("Like", forState: .Normal)
            }
        }
        postCellObj.numberOfLikes.text = ((post["likers"] as! [String]).count - 1).description + " Likes"

有人知道可能发生了什么吗?谢谢!如果你需要更多的信息就告诉我!(:

Answer 1

如果我正确阅读你的代码，你正在删除你的对象后重新加载表格视图单元格，而你正在重新加载你的单元格-标题仍然是"不像"，因为你的objectId仍然存在于你的数组:

(1)

if sender.currentTitle == "Unlike" {
    dispatch_async(dispatch_get_main_queue()) { 
    self.table.reloadRowsAtIndexPaths([indexPath], withRowAnimation: .Automatic)
} 
...

(2)

if (post["likers"] as! NSMutableArray).containsObject(PFUser.currentUser()!.objectId!) {
    postCellObj.likeButton.setTitle("Unlike", forState: .Normal)
}

(3)

...
post.removeObject(PFUser.currentUser()!.objectId!, forKey: "likers")

Answer 2

我可以通过将它放入方法

来解决这个问题

if success == true { 
}

通过

sender.title = "Like" //Or unlike for the else statement

当我大声说出来的时候，我会接受这个答案但是如果有人知道怎么做，我很想听到如何停止

的恶心动画

table.reloadRowsAtIndexPaths([indexPath], withRoAnimation: .None)

因为即使有。none，它看起来还是不那么好。到目前为止，我能找到的唯一答案是刷新整个表，但我不想这么做。