app扩展如何访问包含app Documents /文件夹的文件 [英] How can app extension access files in containing app Documents/ folder

问题描述

在app扩展程序中是否有办法从包含应用程序生成图像，该应用程序存储在/ var / mobile / Containers / Data / Application // Documents //文件夹中？

In the app extension is there a way to get images generated from the containing app which is store in /var/mobile/Containers/Data/Application//Documents// folder?

推荐答案

为了使文件可用于应用扩展程序，您必须使用组路径，因为App Extension无法访问应用程序的文档文件夹，因为您已按照这些步骤操作，

In order to make files available to app extension you have to use Group Path, as App Extension can't access app's Document Folder, for that you have follow these steps,

1. 启用应用程序群组来自项目设置 - >功能。


2. 添加类似 group.yourappid 。



3. 然后使用以下代码。

1. Enable App Groups from Project Settings-> Capabilities.
2. Add a group extension something like group.yourappid.

3. Then use following code.

NSString *docPath=[self groupPath];

NSArray *contents=[[NSFileManager defaultManager] contentsOfDirectoryAtPath:docPath error:nil];

NSMutableArray *images=[[NSMutableArray alloc] init];

    for(NSString *file in contents){
        if([[file pathExtension] isEqualToString:@"png"]){
            [images addObject:[docPath stringByAppendingPathComponent:file]];
        }
    }


-(NSString *)groupPath{
     NSString *appGroupDirectoryPath = [[NSFileManager defaultManager] containerURLForSecurityApplicationGroupIdentifier:group.yourappid].path;

    return appGroupDirectoryPath;
}

您可以添加或根据您生成的图片扩展名更改路径扩展名。

You can add or change the path extension as per your image extensions you are generating.

注意 - 请记住，您需要在组文件夹而不是文档文件夹中生成图像，因此它适用于应用和扩展程序。

干杯。

Swift 3更新

let fileManager = FileManager.default
let url = fileManager.containerURL(forSecurityApplicationGroupIdentifier: "YOUR_GROUP_ID")?.appendingPathComponent("logo.png")

// Write to Group Container            
if !fileManager.fileExists(atPath: url.path) {

    let image = UIImage(named: "name")
    let imageData = UIImagePNGRepresentation(image!)
    fileManager.createFile(atPath: url.path as String, contents: imageData, attributes: nil)
}

// Read from Group Container - (PushNotification attachment example)              
// Add the attachment from group directory to the notification content                    
if let attachment = try? UNNotificationAttachment(identifier: "", url: url!) {

    bestAttemptContent.attachments = [attachment]

    // Serve the notification content
    self.contentHandler!(self.bestAttemptContent!)
}

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