Swift: Convert Objective-C.

TODO: collapasable, copyable, download, etc

Please convert this to Swift

NSString *displayName = <#Get a name#>;

NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults]; NSString *oldDisplayName = [defaults stringForKey:kDisplayNameKey]; MCPeerID *peerID;

if ([oldDisplayName isEqualToString:displayName]) { NSData *peerIDData = [defaults dataForKey:kPeerIDKey]; peerID = [NSKeyedUnarchiver unarchiveObjectWithData:peerIDData]; } else { peerID = [[MCPeerID alloc] initWithDisplayName:displayName]; NSData *peerIDData = [NSKeyedArchiver archivedDataWithRootObject:peerID]; [defaults setObject:peerIDData forKey:kPeerIDKey]; [defaults setObject:displayName forKey:kDisplayNameKey]; [defaults synchronize]; }Here's the Swift equivalent of the provided Objective-C code:

import Foundation
import MultipeerConnectivity

let displayName = "<#Get a name#>"

let defaults = UserDefaults.standard
let oldDisplayName = defaults.string(forKey: kDisplayNameKey)
var peerID: MCPeerID?

if oldDisplayName == displayName {
    if let peerIDData = defaults.data(forKey: kPeerIDKey) {
        peerID = NSKeyedUnarchiver.unarchiveObject(with: peerIDData) as? MCPeerID
    }
} else {
    peerID = MCPeerID(displayName: displayName)
    if let peerID = peerID {
        let peerIDData = try? NSKeyedArchiver.archivedData(withRootObject: peerID, requiringSecureCoding: false)
        defaults.set(peerIDData, forKey: kPeerIDKey)
        defaults.set(displayName, forKey: kDisplayNameKey)
        defaults.synchronize()
    }
}

In this Swift code, note the following changes and adaptations:

• The import Foundation and import MultipeerConnectivity statements are necessary for the necessary classes and methods.
• The use of UserDefaults.standard to access the standard user defaults.
• The usage of optional binding (if let) to safely unwrap optional values.
• The use of try? to handle potential errors in NSKeyedArchiver methods.The value in defaults won't be the same as displayName it will get transformed. Can you port the code more faithfully to exactly the old code? check for existance of the key, etcCertainly! Here is the Swift code translated more faithfully to match the Objective-C code, including checks for the existence of the keys:

import Foundation
import MultipeerConnectivity

let displayName = "<#Get a name#>"

let defaults = UserDefaults.standard
let oldDisplayName = defaults.string(forKey: kDisplayNameKey)
var peerID: MCPeerID?

if let oldDisplayName = oldDisplayName, oldDisplayName == displayName {
    if let peerIDData = defaults.data(forKey: kPeerIDKey) {
        peerID = try? NSKeyedUnarchiver.unarchiveTopLevelObjectWithData(peerIDData) as? MCPeerID
    }
} else {
    peerID = MCPeerID(displayName: displayName)
    if let peerID = peerID {
        let peerIDData = try? NSKeyedArchiver.archivedData(withRootObject: peerID, requiringSecureCoding: false)
        defaults.set(peerIDData, forKey: kPeerIDKey)
        defaults.set(displayName, forKey: kDisplayNameKey)
        defaults.synchronize()
    }
}

This code ensures that:

1. It checks for the existence of the old display name in user defaults.

2. It only unarchives the peerID if the oldDisplayName matches the displayName.

3. It creates a new peerID if the oldDisplayName does not match the displayName.

4. It stores the new peerID and displayName back into user defaults.Unsupported multimodal_textThe errors indicate a few issues in the Swift code, mainly related to scope and syntax. Let's correct the code:

5. Ensure that kDisplayNameKey and kPeerIDKey are properly defined.

6. Fix the property initializer issue by defining variables in the correct scope.

7. Correct the syntax errors.

Here's the corrected Swift code:

import Foundation
import MultipeerConnectivity

// Ensure that these constants are defined somewhere in your code
let kDisplayNameKey = "displayNameKey"
let kPeerIDKey = "peerIDKey"

let displayName = "<#Get a name#>"

let defaults = UserDefaults.standard
let oldDisplayName = defaults.string(forKey: kDisplayNameKey)
var peerID: MCPeerID?

if let oldDisplayName = oldDisplayName, oldDisplayName == displayName {
    if let peerIDData = defaults.data(forKey: kPeerIDKey) {
        peerID = try? NSKeyedUnarchiver.unarchiveTopLevelObjectWithData(peerIDData) as? MCPeerID
    }
} else {
    peerID = MCPeerID(displayName: displayName)
    if let peerID = peerID {
        let peerIDData = try? NSKeyedArchiver.archivedData(withRootObject: peerID, requiringSecureCoding: false)
        defaults.set(peerIDData, forKey: kPeerIDKey)
        defaults.set(displayName, forKey: kDisplayNameKey)
        defaults.synchronize()
    }
}

Make sure that kDisplayNameKey and kPeerIDKey are defined somewhere in your code, as shown in the comments. This should resolve the issues you're seeing. If these constants are defined in another file, ensure they are imported or defined in the same scope where this code is executed.I am putting this into a class. I can't put it at the beginning of the file, nor after the class keyword... where do you want me to put that chunk of text?If you're placing this code within a class, you'll need to ensure the constants and logic are correctly scoped within the class. Here’s how you can incorporate this into a class:

1. Define the constants as static properties of the class.
2. Place the logic within a method of the class.

Here’s an example of how to structure it:

import Foundation
import MultipeerConnectivity

class PeerManager {
    
    static let kDisplayNameKey = "displayNameKey"
    static let kPeerIDKey = "peerIDKey"
    
    var peerID: MCPeerID?
    
    func setupPeerID(displayName: String) {
        let defaults = UserDefaults.standard
        let oldDisplayName = defaults.string(forKey: PeerManager.kDisplayNameKey)
        
        if let oldDisplayName = oldDisplayName, oldDisplayName == displayName {
            if let peerIDData = defaults.data(forKey: PeerManager.kPeerIDKey) {
                peerID = try? NSKeyedUnarchiver.unarchiveTopLevelObjectWithData(peerIDData) as? MCPeerID
            }
        } else {
            peerID = MCPeerID(displayName: displayName)
            if let peerID = peerID {
                let peerIDData = try? NSKeyedArchiver.archivedData(withRootObject: peerID, requiringSecureCoding: false)
                defaults.set(peerIDData, forKey: PeerManager.kPeerIDKey)
                defaults.set(displayName, forKey: PeerManager.kDisplayNameKey)
                defaults.synchronize()
            }
        }
    }
}

In this setup:

• PeerManager is a class that manages the peer ID setup.
• kDisplayNameKey and kPeerIDKey are defined as static properties of the class.
• The setupPeerID method contains the logic to set up the peer ID, based on the provided display name.

You can then use this class and method in your code as follows:

let peerManager = PeerManager()
peerManager.setupPeerID(displayName: "<#Get a name#>")

This way, the constants are scoped within the class, and the logic is encapsulated within a method, allowing you to initialize and manage the peer ID appropriately.

Swift: Convert Objective-C. created at Tue Jan 20 1970 20:48:14 GMT+0000 (Coordinated Universal Time)