ios - 检索每个用户的个人资料图片解析 iOS swift

Question

在我的 iOS 应用中。有推特之类的提要。每个提要都有用户名、头像和他添加的推文。

并且我能够检索每个供稿的用户名，但无法检索个人资料图像。这是我的代码

let spread:PFObject = self.LiveFeedData.objectAtIndex(indexPath.row) as! PFObject

    var user = spread.objectForKey("spreader") as! PFUser

        user.fetchIfNeededInBackgroundWithBlock { (obj: PFObject?, error: NSError?) -> Void in
            if obj != nil {
                var fetchedUser = obj as! PFUser
                var username = fetchedUser["username"] as! String

                cell.username.text = user.username // This Works FINE

            }
        }

        if let userImageFile = user["photo"] as? PFFile{
        userImageFile.getDataInBackgroundWithBlock {
            (imageData: NSData?, error: NSError?) -> Void in
            if (error != nil) {
                if imageData != nil{
                cell.profileImage.image = UIImage(data:imageData!)
                }else{
                    println("No Data")
                }

            }else{
                println(error)
            }
        }

        }

Answer 1

如前所述，使用 PFImageView 可能有助于简化您需要移入 fetch 闭包的代码。

    user.fetchIfNeededInBackgroundWithBlock { (obj: PFObject?, error: NSError?) -> Void in
        if obj != nil {
            var fetchedUser = obj as! PFUser
            var username = fetchedUser["username"] as! String

            cell.username.text = username

            cell.profileImage.file = fetchedUser["photo"] as! PFFile
            cell.profileImage.fetchInBackground()

        }
    }