如何在共享扩展视图控制器中获取标题? [英] How to Get the title in share extension view controller?

问题描述

-(void)viewDidLoad {

    [super viewDidLoad];

    NSExtensionItem *item = self.extensionContext.inputItems[0];
    NSItemProvider *itemProvider = item.attachments[0];
     NSLog(@"%@",itemProvider);

    if ([itemProvider hasItemConformingToTypeIdentifier:(NSString *)kUTTypePlainText])
    {    
        [itemProvider loadItemForTypeIdentifier:(NSString *)kUTTypePlainText options:nil completionHandler:^(NSString *item, NSError *error)
        {       
            if (item)
            {
                textString=item;    
            }
        }];
    }

我在我的应用程序中使用共享扩展名.我将其用作UIViewController而不是SLcomposer的子类.在viewDidLoad中，我试图从NSItemProvider访问页面中的文本，但是它只有一个键是public url，有人可以告诉我如何以实现NSItemProvider中的kUTTypePlainText.我还设置了NSExtensionActivationSupportsText，其类型为Boolean，值为YES

I am using share extension in my app. I am using it as a subclass of a UIViewController not SLcomposer.In the viewDidLoad i am trying to access the text in the page from NSItemProvider,But it has only one key which is public url , Can anybody give me an idea of how to achieve the kUTTypePlainText in NSItemProvider. I also set NSExtensionActivationSupportsText, its type to Boolean, and the value to YES

推荐答案

您可以使用ExtensionPreprocessingJS执行此操作.

You can use the ExtensionPreprocessingJS to do this.

首先，将NSExtensionJavaScriptPreprocessingFile键添加到Info.plist中的NSExtensionAttributes词典中.该值应为不带扩展名的JavaScript文件的名称，即MyExtensionJavaScriptClass.

First, add the the NSExtensionJavaScriptPreprocessingFile key to the NSExtensionAttributes dictionary in your Info.plist. The value should be the name of your JavaScript file without the extension, i.e. MyExtensionJavaScriptClass.

然后，在Info.plist的NSExtensionActivationRule词典中，将NSExtensionActivationSupportsWebPageWithMaxCount键设置为1(数字类型).

Then, in the NSExtensionActivationRule dictionary in your Info.plist, set the NSExtensionActivationSupportsWebPageWithMaxCount key with a value of 1 (type Number).

接下来，使用以下代码将MyExtensionJavaScriptClass.js添加到您的扩展程序中:

Next, add MyExtensionJavaScriptClass.js to your extension with the following code:

var MyExtensionJavaScriptClass = function() {};

MyExtensionJavaScriptClass.prototype = {
    run: function(arguments) {
       arguments.completionFunction({"title": document.title});
    } 
};

// The JavaScript file must contain a global object named "ExtensionPreprocessingJS".
var ExtensionPreprocessingJS = new MyExtensionJavaScriptClass;

然后在ShareViewController viewDidLoad和import MobileCoreServices

Then include the following function in your ShareViewController viewDidLoad and import MobileCoreServices

    let extensionItem = extensionContext?.inputItems.first as! NSExtensionItem
    let itemProvider = extensionItem.attachments?.first as! NSItemProvider

    let propertyList = String(kUTTypePropertyList)
    if itemProvider.hasItemConformingToTypeIdentifier(propertyList) {
        itemProvider.loadItemForTypeIdentifier(propertyList, options: nil, completionHandler: { (item, error) -> Void in
            let dictionary = item as! NSDictionary
            NSOperationQueue.mainQueue().addOperationWithBlock {
                let results = dictionary[NSExtensionJavaScriptPreprocessingResultsKey] as! NSDictionary
                let title = results["title"] as! String                                        
                //yay, you got the title now
            }
        })
    } else {
        print("error")
    }

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