libr-ios/libxShareExt/ShareViewController.swift

//
//  ShareViewController.swift
//  libxShareExt
//
//  Created by Yunlong Zheng on 15/10/30.
//  Copyright © 2015年 librx. All rights reserved.
//

import UIKit
import Social
import MobileCoreServices

class ShareViewController: SLComposeServiceViewController {

    private var shareUrlString: String?
    
    lazy var sharedDefaults: NSUserDefaults? = {
        return NSUserDefaults(suiteName: "group.librme")
    }()
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        for item: AnyObject in self.extensionContext!.inputItems {
            let inputItem = item as! NSExtensionItem
            for provider: AnyObject in inputItem.attachments! {
                
                let itemProvider = provider as! NSItemProvider
                if itemProvider.hasItemConformingToTypeIdentifier(kUTTypePropertyList as String) {
                    // You _HAVE_ to call loadItemForTypeIdentifier in order to get the JS injected
                    itemProvider.loadItemForTypeIdentifier(kUTTypePropertyList as String, options: nil, completionHandler: {
                        (list, error) in
                        if let results = list as? NSDictionary {
                            NSOperationQueue.mainQueue().addOperationWithBlock {
                                // We don't actually care about this...
                                self.itemLoadCompletedWithPreprocessingResults(results["NSExtensionJavaScriptPreprocessingResultsKey"] as! NSDictionary)
                            }
                        }
                    })
                }
            
            }
        }
    }
    
    func itemLoadCompletedWithPreprocessingResults(javaScriptPreprocessingResults: NSDictionary) {
        if let urlString = javaScriptPreprocessingResults["baseURI"] as? String {
            
            self.shareUrlString = urlString
            //print("share url:\(urlString)\n")
            //self.doneWithResults(["message": "Successfully added to the note app"])
        }
    }

    func doneWithResults(resultsForJavaScriptFinalizeArg: NSDictionary?) {
        if let resultsForJavaScriptFinalize = resultsForJavaScriptFinalizeArg {
            
            let identifierType = NSString(format: kUTTypePropertyList, NSUTF8StringEncoding)
            let resultsDictionary = [NSExtensionJavaScriptFinalizeArgumentKey: resultsForJavaScriptFinalize]
            let resultsProvider = NSItemProvider(item: resultsDictionary, typeIdentifier: identifierType as String)
            let resultsItem = NSExtensionItem()
            resultsItem.attachments = [resultsProvider]
            self.extensionContext!.completeRequestReturningItems([resultsItem], completionHandler: nil)
            
        } else {
            // 就算我们没有任何要返回的信息，也要执行这段代码，用于告知我们的Action扩展已经完成了逻辑处理。
            self.extensionContext!.completeRequestReturningItems(nil, completionHandler: nil)
        }
    }
    
    
    override func isContentValid() -> Bool {
        // Do validation of contentText and/or NSExtensionContext attachments here
        return true
    }

    override func didSelectPost() {
        // This is called after the user selects Post. Do the upload of contentText and/or NSExtensionContext attachments.
    
        // Inform the host that we're done, so it un-blocks its UI. Note: Alternatively you could call super's -didSelectPost, which will similarly complete the extension context.
        print("didSelectPost: \(self.shareUrlString)")
        
        var results = sharedDefaults?.objectForKey("ShareContents") as? [AnyObject]
        if results != nil {
            results!.append(self.shareUrlString!)
            sharedDefaults?.setObject(results, forKey: "ShareContents")
        }else{
            let contents = [self.shareUrlString!]
            sharedDefaults?.setObject(contents, forKey: "ShareContents")
        }
        
        sharedDefaults!.synchronize()
        self.extensionContext!.completeRequestReturningItems([], completionHandler: nil)
    }
    
    

    override func configurationItems() -> [AnyObject]! {
        // To add configuration options via table cells at the bottom of the sheet, return an array of SLComposeSheetConfigurationItem here.
        return []
    }

}