iOS - 将图像发送到Instagram - DocumentInteraction

Question

是否可以绕过行动共享表将照片分享给Instagram？

请注意，我知道UIDocumentInteractionController和钩子，事实上它工作正常。使用他们的示例代码，您将获得Copy to Instagram选项（如果您使用独家UTI或可以处理JPG / PNG的大型应用程序列表，以及Instagram，则可以选择）。

这很好，但我想知道是否有办法执行“复制到Instagram”操作，而无需在iOS 9+中显示UIDocumentInteractionController菜单。

为了记录，这是完美运行的代码的简化版本。假设你有一个有效的NSURL ......

        guard let data: NSData = NSData(contentsOfURL: url), 
                  image = UIImage(data: data) else {
            return
        }

        let imageData = UIImageJPEGRepresentation(image, 100)
        let captionString = "caption"
        let writePath = (NSTemporaryDirectory() as NSString).stringByAppendingPathComponent("instagram.ig")

        guard let _ = imageData?.writeToFile(writePath, atomically: true) else {
            return
        }

        let fileURL = NSURL(fileURLWithPath: writePath)
        self.documentController = UIDocumentInteractionController(URL: fileURL)
        self.documentController.delegate = self
        self.documentController.UTI = "com.instagram.photo"
        self.documentController.annotation = NSDictionary(object: captionString, forKey: "InstagramCaption")
        self.documentController.presentOpenInMenuFromRect(viewController.view.frame, inView: viewController.view, animated: true)

问题是这将提供一个“操作表”，我想避免这样做，如果可能的话，我想使用instagram.ige（或任何名称使其独占）并跳过此ActionSheet。

那可能吗？

更新：我还没有找到解决方案，但似乎Instagram最终添加/添加了扩展：“Instagram最近在其iOS应用程序中添加了共享扩展功能。现在，您可以将第三方应用程序的照片直接分享到Instagram”来源：http://www.macworld.com/article/3080038/data-center-cloud/new-instagram-feature-for-ios-makes-it-easier-to-share-photos-from-other-apps.html

Answer 1

更新的Swift 4.2代码

import Photos

    func postImageToInstagram(image: UIImage) {
        UIImageWriteToSavedPhotosAlbum(
            image,
            self,
            #selector(self.image(image:didFinishSavingWithError:contextInfo:)),
            nil
        )
    }

    @objc func image(image: UIImage, didFinishSavingWithError error: NSError?, contextInfo: UnsafeRawPointer) {
        if let err = error {
            print(err) // TODO: handle error
            return
        }

        let fetchOptions = PHFetchOptions()
        fetchOptions.sortDescriptors = [NSSortDescriptor(key: "creationDate", ascending: false)]
        let fetchResult = PHAsset.fetchAssets(with: .image, options: fetchOptions)
        if let lastAsset = fetchResult.firstObject {
            let localIdentifier = lastAsset.localIdentifier
            let u = "instagram://library?AssetPath=" + localIdentifier
            let url = URL(string: u)!
            if UIApplication.shared.canOpenURL(url) {
                UIApplication.shared.open(url, options: [:], completionHandler: nil)
            } else {
                let alertController = UIAlertController(title: "Error", message: "Instagram is not installed", preferredStyle: .alert)
                alertController.addAction(UIAlertAction(title: "OK", style: .default, handler: nil))
                self.present(alertController, animated: true, completion: nil)
            }
        }
    }

原始答案

import Photos
...

func postImageToInstagram(image: UIImage) {
        UIImageWriteToSavedPhotosAlbum(image, self, #selector(SocialShare.image(_:didFinishSavingWithError:contextInfo:)), nil)
}
func image(image: UIImage, didFinishSavingWithError error: NSError?, contextInfo:UnsafePointer<Void>) {
        if error != nil {
            print(error)
        }

        let fetchOptions = PHFetchOptions()
        fetchOptions.sortDescriptors = [NSSortDescriptor(key: "creationDate", ascending: false)]
        let fetchResult = PHAsset.fetchAssetsWithMediaType(.Image, options: fetchOptions)
        if let lastAsset = fetchResult.firstObject as? PHAsset {
            let localIdentifier = lastAsset.localIdentifier
            let u = "instagram://library?LocalIdentifier=" + localIdentifier
            let url = NSURL(string: u)!
            if UIApplication.sharedApplication().canOpenURL(url) {
                UIApplication.sharedApplication().openURL(NSURL(string: u)!)
            } else {
                let alertController = UIAlertController(title: "Error", message: "Instagram is not installed", preferredStyle: .Alert)
                alertController.addAction(UIAlertAction(title: "OK", style: .Default, handler: nil))
                self.presentViewController(alertController, animated: true, completion: nil)
            }

        }
}