从集合视图传递到视图控制器的简单图像数据失败。

This is seriously starting to drive me crazy, since it s really simple. I have a collectionviewcell that gets images from phone library

这真的让我开始疯狂，因为它真的很简单。我有一个collectionviewcell，它从电话库获取图像

When i tap a cell, i get the index of the fetched collection (i m using Photo Framework), then send the selected image (through PHImageManage's imageFromAsset) to a new view controller, assign this image to a new UIimage property and then try to display it on my UIimageView outlet FAIL ! In the debug Window, I can see that the image is passing from the collectionviewcontroller to my FullImageViewController, and I dont understand why I get an error on my outlet (returns NIL for ever)

当我点击一个细胞,我得到获取集合的索引(我使用照片框架),然后把选中的图像(通过PHImageManage imageFromAsset)到一个新的视图控制器,将这个图像分配给新的用户界面图像属性,然后试图显示它在我UIimageView出口失败!在debug窗口中，我可以看到图像正在从collectionviewcontroller传递到我的FullImageViewController，我不明白为什么我的outlet中会出现错误(永远返回NIL)

here s a bit of code, and a bug capture -- The collectioncontroller first

这里有一些代码，还有一个bug捕获——首先是集合控制器

 func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
    let cell: PhotoCollectionViewCell = collectionView.dequeueReusableCellWithReuseIdentifier(identifier, forIndexPath: indexPath) as! PhotoCollectionViewCell

 //   cell.contentView.backgroundColor = UIColor.redColor()
    let asset: PHAsset = photosAsset[indexPath.item] as! PHAsset

    PHImageManager.defaultManager().requestImageForAsset(asset, targetSize: cellSize, contentMode: .AspectFit, options: nil) { (reuslt:UIImage?, info:[NSObject : AnyObject]?) -> Void in
        if let image = reuslt {
            cell.displaythunmb(image)
        }
    }

    return cell

}

func collectionView(collectionView: UICollectionView, didSelectItemAtIndexPath indexPath: NSIndexPath) {

    let asset=photosAsset[indexPath.item] as! PHAsset
    let size:CGSize = CGSizeMake(200, 200)

    PHImageManager.defaultManager().requestImageForAsset(asset, targetSize: size, contentMode: .AspectFit, options: nil) { (result:UIImage?, info:[NSObject : AnyObject]?) -> Void in
        let controller:FullImageViewController = FullImageViewController()
        if let image = result {
        controller.dislpayFullImage(image)
    }
    }

    performSegueWithIdentifier("gofull", sender: self)

}

and here's the fullImageViewController

这是fullImageViewController

class FullImageViewController: UIViewController {
var image:UIImage = UIImage()

@IBOutlet weak var fullimage: UIImageView!


override func viewDidLoad() {
    super.viewDidLoad()
    navigationController?.hidesBarsOnTap = true

}
override func viewWillAppear(animated: Bool) {
    //dislpayFullImage()

}

func dislpayFullImage(fullimg:UIImage){

    if let monimage:UIImage? = fullimg {
        image=monimage!
         fullimage.image = image
    }

}

}

this gives me "fatal error: unexpectedly found nil while unwrapping an Optional value" on the "fullimage.image = image" line

这给了我“致命错误:意外地发现了nil，同时打开了一个可选的值”在“fullimage”上。形象=形象”

I've tried to unwrap, force unwrap and so on, nothing seems to work

我试过开卷、强行开卷等等，但似乎什么都不管用

In the debt window, when I follow the properties I have to following :

在债务窗口中，当我遵循我必须遵循的属性:

fullimg UIImage 0x00007ff3fb6506f0 0x00007ff3fb6506f0 self test.FullImageViewController 0x00007ff3fb6526e0 0x00007ff3fb6526e0 UIKit.UIViewController UIViewController
image UIImage 0x00007ff3fb6506f0 0x00007ff3fb6506f0

fullimg UIImage 0x00007ff3fb6506f0 0x00007ff3fb6506f0自我测试。FullImageViewController 0 x00007ff3fb6526e0 0 x00007ff3fb6526e0 UIKit。UIViewController图像UIImage 0x00007ff3fb6506f0 0x00007ff3fb6506f0

fullimage UIImageView! nil None

fullimage UIImageView !零没有

monimage UIImage? 0x00007ff3fb6506f0 0x00007ff3fb6506f0

monimage界面图像吗?0 x00007ff3fb6506f0 0 x00007ff3fb6506f0

Any idea where I m messing up >

我搞砸了>

1 个解决方案

#1

You are creating an instance of FullImageViewController programmatically but you are using an IBOutlet in this view controller.

您正在以编程方式创建FullImageViewController的一个实例，但是您正在这个视图控制器中使用IBOutlet。

You probably want to instantiate it using storyboard, so you'll have to do something like this:

你可能想要用故事板来实例化它，所以你必须这样做:

let storyboard = UIStoryboard(name: "Main", bundle: NSBundle.mainBundle())
let destination = storyboard.instantiateViewControllerWithIdentifier("yourIdentifier") as! FullImageViewController

Don't forget to set the identifier for your FullImageViewController though.

但是不要忘记为FullImageViewController设置标识符。

EDIT: Since you're using a segue, you should handle passing the data in prepareForSegue(_:):

编辑:既然你在使用segue，你应该在prepareForSegue中处理传递数据(_:):

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
    if segue.identifier == "gofull" {
        let destination = segue.destinationViewController as! FullImageViewController
        destination.someImage = result
    }
}

But accessing fullimage before the view is loaded will still cause a crash, so you should try passing the value to fullimage in viewWillAppear or viewDidLoad.

但是在加载视图之前访问fullimage仍然会导致崩溃，所以您应该尝试在viewWillAppear或viewDidLoad中将值传递给fullimage。

In your FullImageViewController:

在你FullImageViewController:

var someImage: UIImage?

override func viewWillAppear(animated: Bool) {
    super.viewWillAppear(animated)

    if let image = someImage { fullimage.image = image }
}

#1