尝试从Parse获取图像时EXC_BAD_INSTRUCTION

Question

我在下面的行中收到以下错误：＆＃34; 让imgFile = object [＆＃34; imageFile＆＃34;]作为PFFile ＆＃34;

代码：

func getRightLevelInfo() {
    var query = PFQuery(className: "userstatus")
    query.whereKey("username", equalTo: PFUser.currentUser().username)
    query.findObjectsInBackgroundWithBlock {
        (objects: [AnyObject]!, error: NSError!) -> Void in
        if error == nil {
            println("Found something")
            for object in objects {
                println(object.objectId)

                let lastSuccessfulLevel = object["lastSuccessfulLevel"] as Int
                let nextLevel = lastSuccessfulLevel + 1
                let score = object["score"] as Int

                println("lastSuccessfulLevel = " + String(lastSuccessfulLevel) + ", Score = " + String(score))

                var queryLevel = PFQuery(className: "puzzledata")
                queryLevel.whereKey("lastleveldone", equalTo: String(nextLevel))
                queryLevel.findObjectsInBackgroundWithBlock {
                    (levels: [AnyObject]!, error: NSError!) -> Void in
                    if error == nil {

                        for level in levels {
                            self.wordAnswer = level["wordAnswer"] as String
                            self.wordJumbled = level["wordJumbled"] as String

                            println("For this level, wordAnswer = " + self.wordAnswer + ", wordJumbled = " + self.wordJumbled)

                            let imgFile = object["imageFile"] as PFFile


                            imgFile.getDataInBackgroundWithBlock({
                                (imageData: NSData!, error: NSError!) -> Void in
                                if (error == nil) {
                                    let image = UIImage(data:imageData)?
                                    println("Got Image Successfully")

                                } else {
                                    println("ERROR in getting image")
                                }

                            })//getDataInBackgroundWithBlock - end

                        }

                    } else {
                        println("%@", error) //couldn't find level data
                    }
                }


            }
        }
        else {
            println("%@", error)
        }
    }
}

我得到的运行时错误：

虽然错误在这一行＆＃34; 让imgFile = object [＆＃34; imageFile＆＃34;]为PFFile ＆＃34;，您还可以看到解析数据库class确实具有完全相同名称的字段＆＃34; imgFile ＆＃34;

Answer 1

看起来像是一个错字，你应该替换

let imgFile = object["imageFile"] as PFFile

与

let imgFile = level["imageFile"] as PFFile