在IOS8 beta中共享扩展

Question

我正尝试使用新的iOS 8应用程序扩展创建共享扩展。我尝试获取Safari网站的当前网址，以便在UILabel中显示它。够简单。

我正在从苹果这里工作槽通过官方扩展指南https://developer.apple.com/library/content/documentation/General/Conceptual/ExtensibilityPG/Share.html#//apple_ref/doc/uid/TP40014214-CH12-SW1但有些东西没有按预期工作。我知道它只是在测试版中，但也许我只是在做一些错误的事情。

这里是我的代码，以获得扩展内从Safari浏览器的URL的ViewController：

-(void)viewDidAppear:(BOOL)animated{ 
NSExtensionContext *myExtensionContext = [self extensionContext]; 
NSArray *inputItems = [myExtensionContext inputItems]; 
NSMutableString* mutableString = [[NSMutableString alloc]init]; 
for(NSExtensionItem* item in inputItems){ 
    NSMutableString* temp = [NSMutableString stringWithFormat:@"%@, %@, %lu, 
      %lu - ",item.attributedTitle,[item.attributedContentText string], 
      (unsigned long)[item.userInfo count],[item.attachments count]]; 

    for(NSString* key in [item.userInfo allKeys]){ 
     NSArray* array = [item.userInfo objectForKey:@"NSExtensionItemAttachmentsKey"]; 
     [temp appendString:[NSString stringWithFormat:@" in array:%lu@",[array count]]]; 
    } 
    [mutableString appendString:temp]; 
} 
self.myLabel.text = mutableString; 
} 

这是我的我的分机的Info.plist文件的内容：

<dict> 
    <key>NSExtensionMainStoryboard</key> 
    <string>MainInterface</string> 
    <key>NSExtensionPointIdentifier</key> 
    <string>com.apple.share-services</string> 
    <key>NSExtensionActivationRule</key> 
    <dict> 
     <key>NSExtensionActivationSupportsWebURLWithMaxCount</key> 
     <integer>200</integer> 
    </dict> 
</dict> 

当我访问Safari中的苹果iPod支持页面，并尝试将其分享到我的扩展程序，我得到以下值但没有网址：

item.attributedTitle = (null) 
item.attributedContentText = "iPod - Apple Support" 
item.userInfo.count = 2 (two keys: NSExtensionAttributedContentTextKey and 
    NSExtensionItemAttachmentsKey) 
item.attachments.count = 0 

字典对象内的数组始终为空。

当我使用系统邮件应用程序共享苹果站点时，该URL会发布到邮件中。那么为什么我的扩展中没有URL？

Answer 1

以下是如何获取网址。注意类型标识符是kUTTypeURL，块参数是NSURL。另外，plist也需要像我的一样正确。该文档缺乏，从number4 on the Apple dev forums获得帮助。 （你需要注册并登录才能看到它）。

代码：

NSExtensionItem *item = self.extensionContext.inputItems.firstObject; 
NSItemProvider *itemProvider = item.attachments.firstObject; 
if ([itemProvider hasItemConformingToTypeIdentifier:(NSString *)kUTTypeURL]) { 
    [itemProvider loadItemForTypeIdentifier:(NSString *)kUTTypeURL options:nil completionHandler:^(NSURL *url, NSError *error) { 
     self.urlString = url.absoluteString; 
    }]; 
} 

的Info.plist

<key>NSExtension</key> 
<dict> 
    <key>NSExtensionAttributes</key> 
    <dict> 
     <key>NSExtensionActivationRule</key> 
     <dict> 
      <key>NSExtensionActivationSupportsWebURLWithMaxCount</key> 
      <integer>1</integer> 
     </dict> 
     <key>NSExtensionPointName</key> 
     <string>com.apple.share-services</string> 
     <key>NSExtensionPointVersion</key> 
     <string>1.0</string> 
    </dict> 
    <key>NSExtensionPointIdentifier</key> 
    <string>com.apple.share-services</string> 
    <key>NSExtensionMainStoryboard</key> 
    <string>MainInterface</string> 
</dict> 

Answer 2

您的扩展视图控制器应采用NSExtensionRequestHandling协议。其中一个此协议的方法是：

- (void)beginRequestWithExtensionContext:(NSExtensionContext *)context 

你应该等待这个你尝试获得NSExtensionContext之前调用。它甚至提供方法中的上下文作为context参数。

这在this document中概述。

Answer 3

您需要寻找kUTTypePropertyList类型的附件。做这样的事情与第一延伸项目的扩展中的第一个附件：

NSExtensionItem *extensionItem = self.extensionContext.extensionItems.firstObject; 
NSItemProvider *itemProvider = self.extensionItem.attachments.firstObject; 
[itemProvider loadItemForTypeIdentifier:kUTTypePropertyList options:nil 
    completionHandler:^(NSDictionary *item, NSError *error) { 
    // Unpack items from "item" in here 
}]; 

您还需要设置一些JavaScript拿起你从DOM所需要的数据。有关更多详细信息，请参阅WWDC 14的第二个扩展会话。

Answer 4

我已经解决了它自己。我正在尝试使用“共享图像”。

- (void)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. 

// Verify that we have a valid NSExtensionItem 
NSExtensionItem *imageItem = [self.extensionContext.inputItems firstObject]; 
if(!imageItem){ 
    return; 
} 

// Verify that we have a valid NSItemProvider 
NSItemProvider *imageItemProvider = [[imageItem attachments] firstObject]; 
if(!imageItemProvider){ 
    return; 
} 

// Look for an image inside the NSItemProvider 
if([imageItemProvider hasItemConformingToTypeIdentifier:(NSString *)kUTTypeImage]){ 
    [imageItemProvider loadItemForTypeIdentifier:(NSString *)kUTTypeImage options:nil completionHandler:^(UIImage *image, NSError *error) { 
     if(image){ 
      NSLog(@"image %@", image); 
      // do your stuff here... 

     } 
    }]; 
    } 
// this line should not be here. Cos it's called before the block finishes. 
// and this is why the console log or any other task won't work inside the block 
[self.extensionContext completeRequestReturningItems:nil completionHandler:nil]; 

} 

因此，我所做的只是移动[self.extensionContext completeRequestReturningItems：无completionHandler：无]。在其他任务结束时的块内部。最终的工作版本是这样的（Mavericks OS X 10.9上的Xcode 6 beta 5）。4）：

- (void)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. 

// Verify that we have a valid NSExtensionItem 
NSExtensionItem *imageItem = [self.extensionContext.inputItems firstObject]; 
if(!imageItem){ 
    return; 
} 

// Verify that we have a valid NSItemProvider 
NSItemProvider *imageItemProvider = [[imageItem attachments] firstObject]; 
if(!imageItemProvider){ 
    return; 
} 

// Look for an image inside the NSItemProvider 
if([imageItemProvider hasItemConformingToTypeIdentifier:(NSString *)kUTTypeImage]){ 
    [imageItemProvider loadItemForTypeIdentifier:(NSString *)kUTTypeImage options:nil completionHandler:^(UIImage *image, NSError *error) { 
     if(image){ 
      NSLog(@"image %@", image); 
      // do your stuff here... 

      // complete and return 
      [self.extensionContext completeRequestReturningItems:nil completionHandler:nil];  
     } 
    }]; 
    } 
// this line should not be here. Cos it's called before the block finishes. 
// and this is why the console log or any other task won't work inside the block 
// [self.extensionContext completeRequestReturningItems:nil completionHandler:nil]; 

} 

我希望它也可以用于URL共享。

Answer 5

所有这些以前的答案是确实不错，但我只是来翻过这一问题，斯威夫特，并认为这是一个有点tidious提取从给定NSExtensionContext的URL尤其是在CFString到String转换过程和事实completionHandler在loadItemForTypeIdentifier中没有在主线程中执行。

import MobileCoreServices 

extension NSExtensionContext { 
    private var kTypeURL:String { 
     get { 
      return kUTTypeURL as NSString as String 
     } 
    } 

    func extractURL(completion: ((url:NSURL?) -> Void)?) -> Void { 
     var processed:Bool = false 

     for item in self.inputItems ?? [] { 
      if let item = item as? NSExtensionItem, 
       let attachments = item.attachments, 
       let provider = attachments.first as? NSItemProvider 
       where provider.hasItemConformingToTypeIdentifier(kTypeURL) == true { 
        provider.loadItemForTypeIdentifier(kTypeURL, options: nil, completionHandler: { (output, error) -> Void in 
         dispatch_async(dispatch_get_main_queue(), {() -> Void in 
          processed = true 
          if let url = output as? NSURL { 
           completion?(url: url) 
          } 
          else { 
           completion?(url: nil) 
          } 
         }) 

        }) 
      } 
     } 

     // make sure the completion block is called even if no url could be extracted 
     if (processed == false) { 
      completion?(url: nil) 
     } 
    } 
} 

这样，你现在可以简单地在你的UIViewController子类中使用这样的：

self.extensionContext?.extractURL({ (url) -> Void in 
    self.urlLabel.text = url?.absoluteString 
    println(url?.absoluteString) 
}) 

Answer 6

let itemProvider = item.attachments?.first as! NSItemProvider 
itemProvider.loadItemForTypeIdentifier("public.url", options: nil) { (object, error) -> Void in 
    println(object) 
} 

这样的println： http://detail.m.tmall.com/item.htm?id=38131345289&spm=a2147.7632989.mainList.5

Answer 7

其他的答案都是复杂和不完整的。他们只能在Safari中工作，并且不能在Google Chrome中工作。这适用于谷歌浏览器和Safari：

override func viewDidLoad() { 
    super.viewDidLoad() 

    for item in extensionContext!.inputItems { 
     if let attachments = item.attachments { 
      for itemProvider in attachments! { 
       itemProvider.loadItemForTypeIdentifier("public.url", options: nil, completionHandler: { (object, error) -> Void in 
        if object != nil { 
         if let url = object as? NSURL { 
         print(url.absoluteString) //This is your URL 
         } 
        } 
       }) 
      } 
     } 
    } 
}