Question

在cellForRowAtIndexPath函数中，我创建了这个，以便它会为每个帖子附加相似数量，但由于某种原因它会崩溃。有谁知道为什么？

var postQuery = PFQuery(className: "Post")
    postQuery.findObjectsInBackgroundWithBlock { (objects, error) -> Void in
        if let objects = objects {
            for object in objects {
                    self.likesArray.append((object["likers"] as! [String]).count)

            }
        }
    }

Answer 1

您需要打开可选的....

var postQuery = PFQuery(className: "Post")
postQuery.findObjectsInBackgroundWithBlock { (objects, error) -> Void in
    if (objects != nil) {
        for object in objects! {
            self.likesArray.append((object["likers"] as! [String]).count)
        }
    }
}

请尝试这个并告诉我它是否解决了您的问题

试着用解析制作像按钮一样

1 个答案: