Swift崩溃在使用UIDocumentInteractionController时点击"在Instagram中打开"

Question

我有以下代码在我的Swift应用程序上分享Instagram上的图像:@IBAction func instagramShareButton(sender:AnyObject){

    let documentsDirectory = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)[0] as NSString
    let path = documentsDirectory.stringByAppendingPathComponent("Share Icon.igo")

    let imageName: String = "Share Icon.png"
    let image = UIImage(named: imageName)
    let data = UIImagePNGRepresentation(image!)

    data!.writeToFile(path, atomically: true)

    let imagePath = documentsDirectory.stringByAppendingPathComponent("Share Icon.igo")
    let rect = CGRectMake(0, 0, 0, 0)

    UIGraphicsBeginImageContextWithOptions(self.view.bounds.size, self.view.opaque, 0.0)
    self.view.layer.renderInContext(UIGraphicsGetCurrentContext()!)
    UIGraphicsEndImageContext()

    let fileURL = NSURL(fileURLWithPath: imagePath)
    print("fileURL = \(fileURL)")

    var interactionController = UIDocumentInteractionController(URL: fileURL)

    interactionController.delegate = self

    interactionController.UTI = "com.instagram.exclusivegram"

    let msgBody = "My message"
    interactionController.annotation = NSDictionary(object: msgBody, forKey: "InstagramCaption")
    interactionController.presentOpenInMenuFromRect(rect, inView: self.view, animated: true)
}

func documentInteractionControllerWillPresentOpenInMenu(controller:UIDocumentInteractionController){}

代码由Objective C翻译成Swift,因为我没有在Swift中找到任何可以在Instagram上分享的内容.

菜单弹出,我在那里看到Instagram,当我点击它时,我收到以下错误:

断言失败 - [_ UIOpenWithAppActivity performActivity],/ BuildRoot/Library/Cache/com.apple.xbs/Source/UIKit/UIKit-3505.16/UIDocumentInteractionController.m:408

***由于未捕获的异常'NSInternalInconsistencyException'而终止应用程序,原因是:'UIDocumentInteractionController过早地消失了!'

我相信我不得不释放UIDocumentInteractionController对象.我对吗？没有找到任何信息来帮助我理解我如何在Swift中做到这一点.请帮我弄清楚如何解决这个问题.

Answer 1

我认为你是对的.我也有同样的问题.

在开始共享功能之前,必须从UIDocumentInteractionController创建一个全局变量:

var interactionController: UIDocumentInteractionController?
@IBAction func instagramShareButton(sender: AnyObject) {
    ...
    interactionController = UIDocumentInteractionController(URL: fileURL)
    interactionController!.UTI = "com.instagram.exclusivegram"
    let msgBody = "My message"
    interactionController!.annotation = NSDictionary(object: msgBody, forKey: "InstagramCaption")
    interactionController!.presentOpenInMenuFromRect(rect, inView: self.view, animated: true)
}

这适合我!