迅速。错误:无法将'[AnyObject?]'类型的值转换为预期的参数类型'AnyObject?'

时间:2016-04-03 02:55:21

标签: arrays swift append nsuserdefaults

尝试离线保存数据。但是,获取错误无法将类型'[AnyObject?]'的值转换为预期的参数类型'AnyObject?'。无法弄清楚如何将AnyObject数组转换为String数组。谢谢你们的帮助。

// outside the function
var senderArray = [String]()
var messageArray = [String?]()
var photoArray = [UIImage?]()
// func.........
    query.whereKey("downloaded", equalTo: false)
    query.findObjectsInBackgroundWithBlock { (objects: [PFObject]?, error: NSError?) -> Void in
        if error != nil {
        }

        for object in objects! {
            self.senderArray.append(object.objectForKey("sender") as! String)
            self.messageArray.append(object.objectForKey("message") as? String)
            if object.objectForKey("photo") != nil {
                if let converyPFFile = object.objectForKey("photo") as? PFFile{
                    let temp = try! converyPFFile.getData()
                    let image = UIImage(data: temp)
                    self.photoArray.append(image)
                }
            } else {
                self.photoArray.append(nil)
            }
        }

        var tempLocalNameArray = [AnyObject?]()
        var tempLocalMessageArray = [AnyObject?]()
        var tempLocalImageArray = [AnyObject?]()

        if NSUserDefaults.standardUserDefaults().arrayForKey("nameArray") != nil {
            tempLocalNameArray = NSUserDefaults.standardUserDefaults().arrayForKey("nameArray")!
            tempLocalMessageArray = NSUserDefaults.standardUserDefaults().arrayForKey("messageArray")!
            tempLocalImageArray = NSUserDefaults.standardUserDefaults().arrayForKey("imageArray")!
        }

        for i in 0 ..< self.senderArray.count {
            tempLocalNameArray.append(self.senderArray[i])
            tempLocalMessageArray.append(self.messageArray[i])
            tempLocalImageArray.append(self.photoArray[i])
        }
        // error highlighted
        NSUserDefaults.standardUserDefaults().setObject(tempLocalNameArray, forKey: "nameArray")
        // error highlighted
        NSUserDefaults.standardUserDefaults().setObject(tempLocalMessageArray, forKey: "messageArray")
        // error highlighted
        NSUserDefaults.standardUserDefaults().setObject(tempLocalImageArray, forKey: "imageArray")

        self.loadChat()
     }

1 个答案:

答案 0 :(得分:0)

您正尝试使用NSUserDefaults存储图像。但NSUserDefaults不存储任何类型的数据。请阅读documentation

  

value参数只能是属性列表对象:NSData,   NSString,NSNumber,NSDate,NSArray或NSDictionary。对于NSArray和   NSDictionary对象,其内容必须是属性列表对象。

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