从Parse在Swift中加载图像 [英] Loading image in Swift from Parse

问题描述

我已经成功地将数据从Parse提取为快速数据，但是我的图像似乎没有按照我的方式工作.

I'm successfully pulling in data from Parse into swift, but my images don't seem to be working the way I'm doing it.

在cellForRowAtIndexPath方法中，执行以下操作:

In my cellForRowAtIndexPath method, I do the following:

        var event: AnyObject? = eventContainerArray[indexPath.row]

        if let unwrappedEvent: AnyObject = event {
            let eventTitle = unwrappedEvent["title"] as? String
            let eventDate = unwrappedEvent["date"] as? String
            let eventDescription = unwrappedEvent["description"] as String
            let eventImage = unwrappedEvent["image"] as? UIImage

            println(eventImage)

            if (eventImage != nil){


                cell.loadItem(date: eventDate!, title: eventTitle!, description: eventDescription, image: eventImage!)}


            else {


                let testImage: UIImage = UIImage(named: "test-image.png")!

                cell.loadItem(date: eventDate!, title: eventTitle!, description: eventDescription, image: testImage )


            }

        }
    }

    return cell
}

我在我的PFQuery中使用println()，并且将其视为正在加载的对象的一部分:image = "<PFFile: 0x7fee62420b00>";

I'm using println() with my PFQuery, and I am seeing this as part of the object that's loading in: image = "<PFFile: 0x7fee62420b00>";

因此，我将标题，日期，描述等作为上述eventContainerArray的一部分很好地加载，但是当我查看eventImage时，每次都为零.在上面的代码中，它始终默认为加载test-image.png，因为该图像即将变为nil.我只是简单地以不正确的方式处理该PFFile吗?不知道为什么它不起作用.

So I'm getting title, date, description, etc. all loading fine as part of the above eventContainerArray, but when I look at eventImage, it's nil every time. In the code above, it always defaults to loading test-image.png, being that the image is coming up nil. Am I simply handling that PFFile the improper way? Not sure why it's not working.

谢谢！

推荐答案

您的image可能是PFFile对象.您需要加载它才能从中获取UIImage对象.

Your image is likely a PFFile object. You will need to load it to get an UIImage object from it.

let userImageFile = unwrappedEvent["image"] as PFFile
userImageFile.getDataInBackgroundWithBlock {
    (imageData: NSData!, error: NSError!) -> Void in
    if error == nil {
        let eventImage = UIImage(data:imageData)
        // do something with image here
    }
}

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