Swift 5.7 SwiftUI Documentation

gabemott · November 18, 2022, 10:29pm

I was told by my Parse host to open an issue here.

This has Swift but not SwiftUI documentation:
https://docs.parseplatform.org/ios/guide/

If you know Swift, I imagine my confusion is basic, easy and clear for you to sort out and tell me.
How do I integrate an existing Parse database built for ObjectiveC (which I don’t know) into a fresh SwiftUI App.

My vendor documentation doesn’t include Swift let alone SwiftUI.
I’d love to get a basic new SwiftUI App accessing the existing Parse database.

Manuel · November 19, 2022, 5:12pm

I think the question is more related to how to code with SwiftUI. I guess a basic SwiftUI tutorial should give you a good place to start.

I have seen some code examples in this issue, maybe that helps:

github.com/parse-community/Parse-SDK-iOS-OSX

Creating objects with init(withoutDataWithObjectId:) causes crash in SwiftUI preview

opened 12:51PM - 28 Oct 22 UTC

drbarto

type:bug bounty:$20

### New Issue Checklist - [x] I am not disclosing a [vulnerability](https://g…ithub.com/parse-community/Parse-SDK-iOS-OSX/security/policy). - [x] I am not just asking a [question](https://github.com/parse-community/.github/blob/main/SUPPORT.md). - [x] I have searched through [existing issues](https://github.com/parse-community/Parse-SDK-iOS-OSX/issues?q=is%3Aissue). - [x] I can reproduce the issue with the latest versions of [Parse Server](https://github.com/parse-community/parse-server/releases) and the [Parse ObjC SDK](https://github.com/parse-community/Parse-SDK-iOS-OSX/releases). ### Issue Description In a Swift project using the Parse pod, I create a bunch of dummy objects using `init(withoutDataWithObjectId:)` for use in tests and SwiftUI previews. When running the app or unit tests, these objects can be created without problem; however, when trying to create them in the context of a SwiftUI preview, the process crashes. ### Steps to reproduce To give an example, e.g. I have classes `User` and `Project` defined as follows: ```swift class User: PFUser { @NSManaged var firstName: String? @NSManaged var lastName: String? } class Project: PFObject, PFSubclassing { class func parseClassName() -> String { "Project" } @NSManaged var name: String? } ``` Sample code for creating dummy objects: ```swift let user = User(withoutDataWithObjectId: "user_1") user.firstName = "..." user.lastName = "..." user.email = "[email protected]" let project = Project(withoutDataWithObjectId: "project_1") project.name = "..." ``` Finally I want to provide the dummy objects to my UI code, so that it can be tested and previewed without a server connection: ```swift struct UsersView_Previews: PreviewProvider { static var previews: some View { SomeFancyView(user: user, project: project) } } ``` ### Actual Outcome Executing the above "dummy object creation" code works fine when running the app or the unit tests. However, when executing it in the context of the Xcode SwiftUI preview window, it crashes with these errors: When executing `User(withoutDataWithObjectId: "user_1")`: > MyApp crashed due to an uncaught exception `NSInvalidArgumentException`. > Reason: Invalid class name. Class names cannot start with an underscore. When executing `project.name = "..."`: > MyApp crashed due to an uncaught exception `NSInvalidArgumentException`. > Reason: -[PFObject setName:]: unrecognized selector sent to instance 0x600001c74480. I can avoid the 2nd issue with `setName` by replacing the call with `project.setValue("...", forKey: "name")`. However, I found no workaround for the 1st crash related to the classname. ### Expected Outcome The dummy objects can be created without crashing the process. ### Environment Client - Parse ObjC SDK version 1.19.4 (Cocoapods / Xcode 13.4.1) Server - does not apply Database - does not apply ### Logs none

gabemott · December 2, 2022, 7:06pm

I checked that page yourprovided (thanks) and got further along from help here and now getting two clear errors I tried searching for but can’t understand:

Error:
Cannot find ‘ParseClientConfiguration’ in scope

Fixed the second error btw just now clicking Xcode’s “fix” adding configuration.

However, in the documentation it says include import Swift however when I do that, I was getting error that it can’t find that, now it is not showing an error.

Today when I opened the project in Xcode, I have a new error:

Error Domain=NSCocoaErrorDomain Code=513 "“Parse-Swift” couldn’t be removed because you don’t have permission to access it." UserInfo={NSUserStringVariant=(

That may be because I used CleanMyMac yesterday which maybe deleted cache/those contents?

Or is could this all be because I used the Package Manager to get Parse in here instead of cocoa pods?

update:
just to clarify, the second error in the image above is gone after including import Parse at the start.
(new user here can’t embed pic to show you)

All I’ve done is try to update package and clean build etc…

jayson · December 7, 2022, 8:49am

Hope I’m not too late to the party and hope this helps you out.

From what I gather you’re mixing 2 separate libraries namely “Parse” and “ParseSwift”

I see here that you’re still using the Parse library which means you need to use the Parse-IOS-SDK library. ( which is why you got the “Cannot find ‘Parse’ in scope”) error.

I would suggest you start from scratch and use Parse-Swift instead.

The installation and documentation can be found here: GitHub - parse-community/Parse-Swift: The Swift SDK for Parse Platform (iOS, macOS, watchOS, tvOS, Linux, Android, Windows)

this is what you have by adding the code “import ParseSwift”

your setup would look like this

ParseSwift.initialize(applicationId: "xxxxxxxxxx", clientKey: "xxxxxxxxxx", serverURL: URL(string: "https://example.com")!)

When you mentioned earlier “How do I integrate an existing Parse database built for ObjectiveC (which I don’t know) into a fresh SwiftUI App.” - this doesn’t matter as a Parse Database is a stand alone database that can be accessed by any Parse SDK (like javascript, ios, parse-swift). So this doesn’t matter.

What’s important is you understand how to set your database up (from the sound of it is that you have that ready from a 3rd party vendor) and setup your swiftUI app using the Parse-Swfit libary.

hope this helps