共有拡張子とiOSアプリ間でファイルパス/ファイルを共有するためのコード

Question

アプリにSAMPLE（アプリストアに既に存在します）という共有拡張機能を追加しました。これは、SAMPLESHAREと呼ばれます。たとえば、ユーザーが写真を撮って共有しようとするときはいつでも、Open In機能のView Controllerを通過し、AppleからPostダイアログを取得せず、基本的にそれをバイパスしてほしい。そのため、アプリとプラグインの間で共有されるアプリグループを作成し、ファイルパスをアプリのアプリケーションデリゲートのopenURLに渡すことで、共有拡張機能とアプリの間で画像を共有しようとしています。

だから私のメインアプリケーションデリゲートには

- (BOOL)application:(UIApplication *)application openURL:(NSURL *)url sourceApplication:(NSString *)sourceApplication annotation:(id)annotation
{

    return [[SAMPLEExternalFileHandler shared] handleExternalFileURL:url];
}

これは基本的に、別のフローを開く必要があるURLファイルパスがあるかどうかを毎回チェックするために使用します。

私のSHAREEXTENSIONには

#import "ShareViewController.h"
#import <MobileCoreServices/UTCoreTypes.h>
//Macro to hide post dialog or not, if defined, will be hidden, comment during debugging
#define HIDE_POST_DIALOG

@interface ShareViewController ()

@end

@implementation ShareViewController

NSUInteger m_inputItemCount = 0; // Keeps track of the number of attachments we have opened asynchronously.
NSString * m_invokeArgs = NULL;  // A string to be passed to your AIR app with information about the attachments.
NSString * APP_SHARE_GROUP = @"group.com.SAMPLE.SAMPLESHAREPLUGIN";
const NSString * APP_SHARE_URL_SCHEME = @"SAMPLE";
CGFloat m_oldAlpha = 1.0; // Keeps the original transparency of the Post dialog for when we want to hide it.

- (BOOL)isContentValid {
    // Do validation of contentText and/or NSExtensionContext attachments here
    return YES;
}

- ( void ) didSelectPost
{
#ifdef HIDE_POST_DIALOG
    return;
#endif
    [ self passSelectedItemsToApp ];
    // Note: This call is expected to be made here. Ignore it. We'll tell the Host we are done after we've invoked the app.
    //    [ self.extensionContext completeRequestReturningItems: @[] completionHandler: nil ];
}
- ( void ) addImagePathToArgumentList: ( NSString * ) imagePath
{
    assert( NULL != imagePath );

    // The list of arguments we will pass to the AIR app when we invoke it.
    // It will be a comma-separated list of file paths: /path/to/image1.jpg,/path/to/image2.jpg
    if ( NULL == m_invokeArgs )
    {
        m_invokeArgs = imagePath;
    }
    else
    {
        m_invokeArgs = [ NSString stringWithFormat: @"%@,%@", m_invokeArgs, imagePath ];
    }
}

- ( NSString * ) saveImageToAppGroupFolder: ( UIImage * ) image
                                imageIndex: ( int ) imageIndex
{
    assert( NULL != image );

    NSData * jpegData = UIImageJPEGRepresentation( image, 1.0 );

    NSURL * containerURL = [ [ NSFileManager defaultManager] containerURLForSecurityApplicationGroupIdentifier: APP_SHARE_GROUP ];
    NSString * documentsPath = containerURL.path;

    // Note that we aren't using massively unique names for the files in this example:
    NSString * fileName = [ NSString stringWithFormat: @"image%d.jpg", imageIndex ];

    NSString * filePath = [ documentsPath stringByAppendingPathComponent: fileName ];
    [ jpegData writeToFile: filePath atomically: YES ];

    return filePath;
}

- ( void ) passSelectedItemsToApp
{
    NSExtensionItem * item = self.extensionContext.inputItems.firstObject;

    // Reset the counter and the argument list for invoking the app:
    m_invokeArgs = NULL;
    m_inputItemCount = item.attachments.count;

    // Iterate through the attached files
    for ( NSItemProvider * itemProvider in item.attachments )
    {
        // Check if we are sharing a JPEG
        if ( [ itemProvider hasItemConformingToTypeIdentifier: ( NSString * ) kUTTypeImage ] )
        {
            // Load it, so we can get the path to it
            [ itemProvider loadItemForTypeIdentifier: ( NSString * ) kUTTypeImage
                                             options: NULL
                                   completionHandler: ^ ( UIImage * image, NSError * error )
             {
                 static int itemIdx = 0;

                 if ( NULL != error )
                 {
                     NSLog( @"There was an error retrieving the attachments: %@", error );
                     return;
                 }

                 // The app won't be able to access the images by path directly in the Camera Roll folder,
                 // so we temporary copy them to a folder which both the extension and the app can access:
                 NSString * filePath = [ self saveImageToAppGroupFolder: image imageIndex: itemIdx ];

                 // Now add the path to the list of arguments we'll pass to the app:
                 [ self addImagePathToArgumentList: filePath ];

                 // If we have reached the last attachment, it's time to hand control to the app:
                 if ( ++itemIdx >= m_inputItemCount )
                 {
                     [ self invokeApp: m_invokeArgs ];
                 }
             } ];
        }
    }
}
- ( void ) invokeApp: ( NSString * ) invokeArgs
{
    // Prepare the URL request
    // this will use the custom url scheme of your app
    // and the paths to the photos you want to share:
    NSString * urlString = [ NSString stringWithFormat: @"%@://%@", APP_SHARE_URL_SCHEME, ( NULL == invokeArgs ? @"" : invokeArgs ) ];
    NSURL * url = [ NSURL URLWithString: urlString ];

    NSString *className = @"UIApplication";
    if ( NSClassFromString( className ) )
    {
        id object = [ NSClassFromString( className ) performSelector: @selector( sharedApplication ) ];
        [ object performSelector: @selector( openURL: ) withObject: url ];
    }

    // Now let the Host app know we are done, so that it unblocks its UI:
    [ super didSelectPost ];
}

#ifdef HIDE_POST_DIALOG
- ( NSArray * ) configurationItems
{
    // Comment out this whole function if you want the Post dialog to show.
    [ self passSelectedItemsToApp ];

    // To add configuration options via table cells at the bottom of the sheet, return an array of SLComposeSheetConfigurationItem here.
    return @[];
}
#endif


#ifdef HIDE_POST_DIALOG
- ( void ) willMoveToParentViewController: ( UIViewController * ) parent
{
    // This is called at the point where the Post dialog is about to be shown.
    // Make it transparent, so we don't see it, but first remember how transparent it was originally:

    m_oldAlpha = [ self.view alpha ];
    [ self.view setAlpha: 0.0 ];
}
#endif

#ifdef HIDE_POST_DIALOG
- ( void ) didMoveToParentViewController: ( UIViewController * ) parent
{
    // Restore the original transparency:
    [ self.view setAlpha: m_oldAlpha ];
}
#endif
#ifdef HIDE_POST_DIALOG
- ( id ) init
{
    if ( self = [ super init ] )
    {
        // Subscribe to the notification which will tell us when the keyboard is about to pop up:
        [ [ NSNotificationCenter defaultCenter ] addObserver: self selector: @selector( keyboardWillShow: ) name: UIKeyboardWillShowNotification    object: nil ];
    }

    return self;
}
#endif
#ifdef HIDE_POST_DIALOG
- ( void ) keyboardWillShow: ( NSNotification * ) note
{
    // Dismiss the keyboard before it has had a chance to show up:
    [ self.view endEditing: true ];
}
#endif
@end

そして、拡張機能の私のinfo.plistは

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.Apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
    <key>CFBundleDevelopmentRegion</key>
    <string>en</string>
    <key>CFBundleDisplayName</key>
    <string>SAMPLESHARE</string>
    <key>CFBundleExecutable</key>
    <string>$(EXECUTABLE_NAME)</string>
    <key>CFBundleIdentifier</key>
    <string>com.org.SAMPLE.$(PRODUCT_NAME:rfc1034identifier)</string>
    <key>CFBundleInfoDictionaryVersion</key>
    <string>6.0</string>
    <key>CFBundleName</key>
    <string>$(PRODUCT_NAME)</string>
    <key>CFBundlePackageType</key>
    <string>XPC!</string>
    <key>CFBundleShortVersionString</key>
    <string>1.0</string>
    <key>CFBundleSignature</key>
    <string>????</string>
    <key>CFBundleVersion</key>
    <string>1</string>
    <key>NSExtension</key>
    <dict>
        <key>NSExtensionAttributes</key>
         <dict>
        <key>NSExtensionActivationRule</key>
        <dict>
            <key>NSExtensionActivationSupportsImageWithMaxCount</key>
            <integer>1</integer>
        </dict>
    </dict>
        <key>NSExtensionMainStoryboard</key>
        <string>MainInterface</string>
        <key>NSExtensionPointIdentifier</key>
        <string>com.Apple.share-services</string>
    </dict>
</dict>
</plist>

私は基本的にインターネット（評判の良いサイト）からいくつかのコモンズライセンスコードを使用しましたが、これはアプリストアのレビュープロセスに合格したと主張しています。

コードには2つの回避策があります。1つは共有拡張機能からOpenURLを呼び出すことです（これは精練からSOはiOS8.3以降の回避策なしでは通常はまだ不可能のようです） Appleは、誰かが共有をクリックしたときにデフォルトで提供される投稿ダイアログとキーボードを非表示にすることです。これは機能します。

2つの質問があります

1.) Will this be accepted on the app store? -- basically how are apps like facebook/whatsapp doing it and they are being accepted?
2.) Whenever I run this, it says `NSExtensionActivationRule` if set to `TRUEPREDICATE` will be rejected in review, what should the value be? 

更新：

そこで、ドキュメントを精査して、質問2の修正を見つけ、これを変更しました。これですべてが機能し、TRUEPREDICATEはありません。これはストアで受け入れられますか、それともこれを行う別の方法がありますか？

更新2：

NSUserDefaultsを使用して、拡張機能からアプリにデータを渡しました。これもデータを共有するための1つの要件だと思います。

Answer 1

[〜＃〜]更新[〜＃〜]

このアプリは、メッセージパッシングメカニズムとしてNSUSERDEFAULTSを使用してレビューで承認されました。手順は次のとおりです。

1.）共有拡張機能：

#import "ShareViewController.h"
#import <MobileCoreServices/UTCoreTypes.h>
//Macro to hide post dialog or not, if defined, will be hidden, comment during debugging
#define HIDE_POST_DIALOG

@interface ShareViewController ()

@end

@implementation ShareViewController

NSUInteger m_inputItemCount = 0; // Keeps track of the number of attachments we have opened asynchronously.
NSString * m_invokeArgs = NULL;  // A string to be passed to your AIR app with information about the attachments.
NSString * APP_SHARE_GROUP = @"group.com.schemename.nameofyourshareappgroup";
const NSString * APP_SHARE_URL_SCHEME = @"schemename";
CGFloat m_oldAlpha = 1.0; // Keeps the original transparency of the Post dialog for when we want to hide it.

- (BOOL)isContentValid {
    // Do validation of contentText and/or NSExtensionContext attachments here
    return YES;
}

- ( void ) didSelectPost
{
#ifdef HIDE_POST_DIALOG
    return;
#endif

    [ self passSelectedItemsToApp ];
    // Note: This call is expected to be made here. Ignore it. We'll tell the Host we are done after we've invoked the app.
    //    [ self.extensionContext completeRequestReturningItems: @[] completionHandler: nil ];
}
- ( void ) addImagePathToArgumentList: ( NSString * ) imagePath
{
    assert( NULL != imagePath );

    // The list of arguments we will pass to the AIR app when we invoke it.
    // It will be a comma-separated list of file paths: /path/to/image1.jpg,/path/to/image2.jpg
    if ( NULL == m_invokeArgs )
    {
        m_invokeArgs = imagePath;
    }
    else
    {
        m_invokeArgs = [ NSString stringWithFormat: @"%@,%@", m_invokeArgs, imagePath ];
    }
}

- ( NSString * ) saveImageToAppGroupFolder: ( UIImage * ) image
                                imageIndex: ( int ) imageIndex
{
    assert( NULL != image );

    NSData * jpegData = UIImageJPEGRepresentation( image, 1.0 );

    NSURL * containerURL = [ [ NSFileManager defaultManager] containerURLForSecurityApplicationGroupIdentifier: APP_SHARE_GROUP ];
    NSString * documentsPath = containerURL.path;

    // Note that we aren't using massively unique names for the files in this example:
    NSString * fileName = [ NSString stringWithFormat: @"image%d.jpg", imageIndex ];

    NSString * filePath = [ documentsPath stringByAppendingPathComponent: fileName ];
    [ jpegData writeToFile: filePath atomically: YES ];

    //Mahantesh -- Store image url to NSUserDefaults

    NSUserDefaults *defaults=[[NSUserDefaults alloc] initWithSuiteName:@"group.com.schemename.nameofyourshareappgroup"];
    [defaults setObject:filePath forKey:@"url"];
    [defaults synchronize];

    return filePath;
}

- ( void ) passSelectedItemsToApp
{
    NSExtensionItem * item = self.extensionContext.inputItems.firstObject;

    // Reset the counter and the argument list for invoking the app:
    m_invokeArgs = NULL;
    m_inputItemCount = item.attachments.count;

    // Iterate through the attached files
    for ( NSItemProvider * itemProvider in item.attachments )
    {
        // Check if we are sharing a Image
        if ( [ itemProvider hasItemConformingToTypeIdentifier: ( NSString * ) kUTTypeImage ] )
        {
            // Load it, so we can get the path to it
            [ itemProvider loadItemForTypeIdentifier: ( NSString * ) kUTTypeImage
                                             options: NULL
                                   completionHandler: ^ ( UIImage * image, NSError * error )
             {
                 static int itemIdx = 0;

                 if ( NULL != error )
                 {
                     NSLog( @"There was an error retrieving the attachments: %@", error );
                     return;
                 }

                 // The app won't be able to access the images by path directly in the Camera Roll folder,
                 // so we temporary copy them to a folder which both the extension and the app can access:
                 NSString * filePath = [ self saveImageToAppGroupFolder: image imageIndex: itemIdx ];

                 // Now add the path to the list of arguments we'll pass to the app:
                 [ self addImagePathToArgumentList: filePath ];

                 // If we have reached the last attachment, it's time to hand control to the app:
                 if ( ++itemIdx >= m_inputItemCount )
                 {
                     [ self invokeApp: m_invokeArgs ];
                 }
             } ];
        }
    }
}
- ( void ) invokeApp: ( NSString * ) invokeArgs
{
    // Prepare the URL request
    // this will use the custom url scheme of your app
    // and the paths to the photos you want to share:
    NSString * urlString = [ NSString stringWithFormat: @"%@://%@", APP_SHARE_URL_SCHEME, ( NULL == invokeArgs ? @"" : invokeArgs ) ];
    NSURL * url = [ NSURL URLWithString: urlString ];

    NSString *className = @"UIApplication";
    if ( NSClassFromString( className ) )
    {
        id object = [ NSClassFromString( className ) performSelector: @selector( sharedApplication ) ];
        [ object performSelector: @selector( openURL: ) withObject: url ];
    }

    // Now let the Host app know we are done, so that it unblocks its UI:
    [ super didSelectPost ];
}

#ifdef HIDE_POST_DIALOG
- ( NSArray * ) configurationItems
{
    // Comment out this whole function if you want the Post dialog to show.
    [ self passSelectedItemsToApp ];

    // To add configuration options via table cells at the bottom of the sheet, return an array of SLComposeSheetConfigurationItem here.
    return @[];
}
#endif


#ifdef HIDE_POST_DIALOG
- ( void ) willMoveToParentViewController: ( UIViewController * ) parent
{
    // This is called at the point where the Post dialog is about to be shown.
    // Make it transparent, so we don't see it, but first remember how transparent it was originally:

    m_oldAlpha = [ self.view alpha ];
    [ self.view setAlpha: 0.0 ];
}
#endif

#ifdef HIDE_POST_DIALOG
- ( void ) didMoveToParentViewController: ( UIViewController * ) parent
{
    // Restore the original transparency:
    [ self.view setAlpha: m_oldAlpha ];
}
#endif
#ifdef HIDE_POST_DIALOG
- ( id ) init
{
    if ( self = [ super init ] )
    {
        // Subscribe to the notification which will tell us when the keyboard is about to pop up:
        [ [ NSNotificationCenter defaultCenter ] addObserver: self selector: @selector( keyboardWillShow: ) name: UIKeyboardWillShowNotification    object: nil ];
    }

    return self;
}
#endif
#ifdef HIDE_POST_DIALOG
- ( void ) keyboardWillShow: ( NSNotification * ) note
{
    // Dismiss the keyboard before it has had a chance to show up:
    [ self.view endEditing: true ];
}
#endif
@end

2. アプリケーションデリゲートのopenURLメソッドで

           //Slartibartfast -- For the case where we are opening app from an extension
            NSString *STATIC_FILE_HANDLE = @"file://";
           //If app is opened from share extension, do the following
           /*
            1.) Get path of shared file from NSUserDefaults
            2.) Get data from file and store in some variable
            3.) Create a new accesible unique file path
            4.) Dump data created into this file.
            */
   
           NSUserDefaults *defaults=[[NSUserDefaults alloc] initWithSuiteName:YOURAPP_STATIC_APP_GROUP_NAME];
           NSString *path=nil;
           if(defaults)
           {
               [defaults synchronize];
               path = [defaults stringForKey:@"url"];
           }
   
           if(path.length != 0)
           {
               NSData *data;
               //Get file path from url shared
               NSString * newFilePathConverted = [STATIC_FILE_HANDLE stringByAppendingString:path];
               url = [ NSURL URLWithString: newFilePathConverted ];
               data = [NSData dataWithContentsOfURL:url];
               //Create a regular access path because this app cant preview a shared app group path
               NSString *regularAccessPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
               NSString *uuid = [[NSUUID UUID] UUIDString];
               //Copy file to a jpg image(ignore extension, will convert from png)
               NSString *uniqueFilePath= [ NSString stringWithFormat: @"/image%@.jpg", uuid];
               regularAccessPath = [regularAccessPath stringByAppendingString:uniqueFilePath];
               NSString * newFilePathConverted1 = [STATIC_FILE_HANDLE stringByAppendingString:regularAccessPath];
               url = [ NSURL URLWithString: newFilePathConverted1 ];
               //Dump existing shared file path data into newly created file.
               [data writeToURL:url atomically:YES];
               //Reset NSUserDefaults to Nil once file is copied.
               [defaults setObject:nil forKey:@"url"];
   
           }
       //Do what you want
       }
   

おかげで EasyNativeExtensions ポインタを

Answer 2

1. Appleのダイアログのデフォルトを表示したくない場合。 @interfaceではなくUIViewControllerから継承する必要がありますShareViewController：SLComposeServiceViewController
2. Apple開発者向けドキュメントでは、拡張機能アプリを直接開くことを許可しないでください。今日の拡張機能アプリを除くアプリが含まれています。

Answer 3

あなたの質問は少し混乱していますが、あるアプリから別のアプリにデータを渡すことに関するものであれば、UIPasteboardという優れた解決策があります。

カスタムURLハンドラーを使用してアプリ間をジャンプすることに問題がない場合は、あと2つの手順があります。

ステップ1
データの受け渡しを担当する最初のアプリケーションで、これらのメソッドを実装してから、カスタムURLを呼び出します。

UIPasteboard *pasteboard = [UIPasteboard generalPasteboard];
[[UIPasteboard generalPasteboard] setImage:passImage];

ステップ2
ターゲットViewControllerで、もう一度UIPasteboardを呼び出して、そこからデータを取得します。

UIPasteboard *pasteboard = [UIPasteboard generalPasteboard];
   UIImage *getImage = pasteboard.image;

UIImageを渡すと、同じタイプで取得されることに注意してください =