检索每个用户的个人资料图片解析iOS swift [英] Retrieve profile picture of each user parse iOS swift

问题描述

在我的iOS应用中。有像饲料的推特。每个Feed都有用户名，个人资料图片和他添加的推文。

In my iOS app. there is twitter like feed. and each feed has username, profile picture and the tweets he has added.

并且我能够检索每个Feed的用户名但无法检索个人资料图片。这是我的代码

and im able to retrieve username to each feed but cannot retrieve the profile image. here is my code

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)
            }
        }

        }

推荐答案

如上所述，使用PFImageView可以帮助简化您需要移动到fetch闭包中的代码。

As discussed, using a PFImageView may help streamline the code that you need to move into your fetch closure.

    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()

        }
    }

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