I made a music app for macOS that need the access of the file on disk. I can get the proper url, but I can't access the file. To figure out that problem, here I create a concise code snippet to concentrate on the question itself.
.onAppear {
var url = FileManager.default.homeDirectoryForCurrentUser
url.appendPathComponent("Downloads/Test.txt")
var text: String = ""
do {
text = try String(contentsOf: url)
} catch {
print("ERROR: \(error.localizedDescription)")
}
}
The output would be like this
ERROR: The file “Test.txt” couldn’t be opened because you don’t have permission to view it.. So I noticed App Sandbox in Targets > Signing & Capabilities. But at the list of file access (as you can see in the following picture), there's only User Selected File, Downloads Folder, Pictures Folder, Music Folder and Movie Folder. So I come up with 3 questions:
What that User Selected File means? Is that means that the user can select some specific file for my app to access? If it is, how can user selects them?
How can I get access to other folders like Desktop Folder if I remain the App Sandbox capability here?
I also noticed the trash icon on right-upper corner. If I delete App Sandbox, I can access every folder I want with the user's agreement by a default system pop-up. But what the deletion of App Sandbox means? Does it make my app "untrusted" somehow when user install it or others? Does it cause any security problems?
And It couldn't be better if you can tell me the conventions major developers follow when meet this problem. I would highly appreciate your help.
Related
Is it possible to access calendar events in screen saver? I am able to request permission in the application. But some API is not prompting in the case of the screensaver.
I didn't find any documentation around it.
I used the following code to requesting calendar events:
func requestPermissionForCalendar()
{
var eventStore = EKEventStore()
eventStore.requestAccess(to: EKEntityType.event) { granted, error in
if granted{
print("Permission granted")
}else{
print("The app is not permitted to access reminders, make sure to grant permission in the settings and try again")
}
}
}
Couple of things, first, a screen saver is completely passive in macOS. Any prompt for anything will be disregarded when it's running fullscreen, as a screensaver.
In general, the proper way to do this with a screensaver is to ask for permission in the configurationSheet (the screen saver options). The user will get prompted there, and can allow or deny you. I do use this for example to request the user location.
Once allowed in System Preferences, your screensaver when running in screensaver mode will get access. I suggest you test your code first in the configuration sheet as this is much easier.
Additional note, ScreenSavers on macOS since Catalina are sandboxed by an application extension provided by Apple, and that extension has a limited list of entitlements (see a list here https://github.com/glouel/ScreenSaverMinimal).
I'm not particularly familiar with EKEventStore, but if it requires a specific entitlement to make it work, you'll be stuck as you can't add any entitlement yourself, everything depends on legacyScreenSaver.appex.
I want to open any email attachments with my iOS app. Means from my iOS app I want to open email and if there is any attachments(like pdf), I want to open this attachment with my app.I am able to open email app from my app with the following code
if let mailURL = URL(string: "message:") {
if UIApplication.shared.canOpenURL(mailURL) {
UIApplication.shared.open(mailURL, options: [:], completionHandler: nil)
}
}
After that how to open any attachments inside the iOS app. can any one help me. Can I save the attachments to my documents Directory?
Actually my requirement is from my app I will go to the mail box. If any attachment present there, I have to open it with my app. Not only I want to open it with my app, but also I want to save the file in my documents directory.
You can't tell the Mail app what to do so what you want is not exactly possible.
What you can do is add your app in the "Open In" menu by supporting some file types. So that when the user taps the attachment your app will appear in the list of apps.
You can do that this way:
Add the file types your app can handle. Follow the instructions here: https://developer.apple.com/library/archive/qa/qa1587/_index.html
Once 1. is done add the following function in your AppDelegate:
func application(application: UIApplication, handleOpenURL url: NSURL) -> Bool {
// do what you want with file
}
To save the file in your app's document directory you can see how it's done here:
https://programmingwithswift.com/save-file-to-documents-directory-with-swift/
My app only needs the 'Privacy - Photo Library Additions Usage Description' property in the plist file (app writes to Photo library, but doesn't read).
I use this code to check for permissions:
PHPhotoLibrary.requestAuthorization { status in
if status == .authorized {
print("Permission granted")
} else {
print("Unavailable")
}
}
In the iOS Settings for my app, even though the plist only needs 'Add Photos Only', 'Read and Write' is also listed (??), and the above code only gets the authorised status if 'Read and Write' is ticked (ticking 'Add Photos Only' just causes the above code to go through to the else statement).
I'm a bit confused to why 'Read & Write' is even listed as a setting for my app, when my plist doesn't include "Privacy - Photo Library Usage Description".
Any ideas?
It's because you are calling PHPhotoLibrary.requestAuthorization.
If all you need is to write blindly into the user's camera roll, do not call PHPhotoLibrary.requestAuthorization. Just go ahead and write, e.g. by calling UIImageWriteToSavedPhotosAlbum or UISaveVideoAtPathToSavedPhotosAlbum. The runtime will request authorization on your behalf.
But if you want to interact with the photo library itself, i.e. thru the Photos framework, then you need authorization and an entry under Privacy - Photo Library Usage Description, even if all you intend to do is write.
Judging by your comments, you may be confused about what requestAuthorization does. It tries to obtain permission. If all you want to know is what the current authorization status actually is, call authorizationStatus instead.
However, even then, we're talking about the photo library itself, and thus the value referred to as Read & Write in Settings.
If you want to know whether you have permission to do UIImageWriteToSavedPhotosAlbum or UISaveVideoAtPathToSavedPhotosAlbum, just go ahead and call it. If there's a permissions problem, you'll hear about it in the completion handler.
I'm trying to implement Firebase Dynamic Linking.
i have created project on firebase console and provided the required
value(prefx and appid).
i also have allowed the association domains from developer console
and it is sucessfully showing true flag.
in xcode i have on the feature of association domain and added the url identifiers etc.
Problem: still the problem i'm facing is that Association Domain Section says
Add the Association Domains feature to your App ID.
don't know whats the reason why i'm getting this error.
The screen shot is also attached for prove.
i have figured this out by searching for long time.
This is basically not a big issues the error
“Add the associated Domains feature to your App ID”
Will go away once you enable the Associated Domains in your APP ID in developer.apple.com. If it doesn’t go away, quit and relaunch the xcode few times and it will work.
reference: https://medium.com/#abhimuralidharan/universal-links-in-ios-79c4ee038272
I had a similar problem. The problem was solved when I turned off and turned on the feature in Capabilities. But then I had several entitlements files in different folders. Steps to combine these files into one:
Open in text editor MY_PROJECT_NAME.xcodeproj\project.pbxproj
Find CODE_SIGN_ENTITLEMENTS and set correct path. Example:
"MY_PROJECT_NAME/Entitlements/MY_TARGET_NAME.entitlements"
I do not recommend using a standard text editor, since it can automatically replace some characters in the file while saving.
You need to add Associated domains to your App Capabilities. Please see screenshot. Add applinks:yourdomain.com
Then Use below code to get Short URL
guard let link = URL(string: "https://www.yourdomain.com/share_location.html?Id=\(RandomID)&uid=\(uid)") else { return }
let dynamicLinksDomain = "yourdomain.page.link"
let components = DynamicLinkComponents(link: link, domain: dynamicLinksDomain)
// [START shortLinkOptions]
let options = DynamicLinkComponentsOptions()
options.pathLength = .unguessable
components.options = options
// [END shortLinkOptions]
// [START shortenLink]
components.shorten { (shortURL, warnings, error) in
// Handle shortURL.
if let error = error {
print(error.localizedDescription)
return
}
print(shortURL?.absoluteString ?? "")
}
I coded for osx application to remove file from directory path but I had received error as "couldn’t be removed because you don’t have permission to access it". So I want to set access permission code to remove that list of files. If any one have idea or solution please help me. The code as pasted below for reference :
if fileManager.fileExists(atPath: fullpath) == true {
print("File Available \(fullpath)")
do {
_ = try fileManager.removeItem(atPath: fullpath)
} catch let error as NSError{
print(error.localizedDescription)
}
}
In above code, I had found the exist file in directory but I got error that "couldn’t be removed because you don’t have permission to access it".
I want to get solution of access permission and remove file from directory. Thanks in advance.
If you want your app to be able to access files outside your own app, you need to turn App Sandbox off in your app target's capabilities.