CodeProject Latest postings for iOS

PLEASE READ: How to get an answer to your question

Chris Maunder — Wed, 14 Jan 2015 02:36:00 GMT

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cheers
Chris Maunder

IOS app for Arduino IoT

noram wireless — Fri, 01 Sep 2023 14:19:00 GMT

Hi everyone, I hope you are doing well.

I'm working on a project that involves Arduino microcontroller and I would like to develop an app that can control such devices. I'm using wifi as communication protocol.

By any chance do you have any examples (simple source code) that I can use as a reference to make communication between an IOS app and Arduino?

Thanks in advance.
Regards

Immediate help for presentation writing

siyavash440ر 11 — Sat, 10 Sep 2022 19:33:00 GMT

Hello
Friends, I am a newbie
I want to write a program that receives several inputs from the user, puts the inputs in an array, and by selecting a button, displays these inputs one by one in the message box, that is, every time I click OK on the message box, it displays the second input And it will continue like this until the entries entered by the user are finished, it is very urgent, please help me

Not Enough Storage，这堆英文是什么鬼?

xnny — Mon, 25 Jul 2022 04:36:00 GMT

Not Enough Storage
This iPhone cannot be backed upbecause there is not enough iCloudstorage available.
You can manage your storage in Settings.

Howto: Exchange data from network to mobile app

David_DK — Mon, 10 Jan 2022 08:17:00 GMT

Hi
Just started on a test project to see how to access data on the company network in a mobile app.
Short I have some data logged into a SQL table that I want to display/access on a phone (both Android and iPhone).

So inspired from something I worked on some years ago and some google'ing I made a WCF service and are trying to access it in Xamarin.

BUT... I am now in doubt if what I am doing is the best way to do it?
I have just read that WCF is dead and I am not sure if Xamarin is also dead.
So before using to much time running in the wrong direction...

Is WCF the best way to go, or what should I use?
Same with Xamarin - better alternative?

I hope this is not to stupid a question that have been asked a zillion times and I just havn't stumpled across it....

Thanks in advance
//David

AES-GCM 256 Encrypt & Decrypt in iOS Swift Sync with .Net output

Bb M — Sat, 03 Jul 2021 22:18:00 GMT

I want to use AES-GCM encryption of a plaintext with 'key' only. The 'key' will be received from backend (.net), in webservice response. The same key will be used later in backend as well to decrypt the encrypted value.

I have used extension as follwoing

To generate string to Symetric key

extension SymmetricKey {
init(string keyString: String, size: SymmetricKeySize = .bits256) throws {
guard var keyData = keyString.data(using: .utf8) else {
  print("Could not create base64 encoded Data from String.")
  throw CryptoKitError.incorrectParameterSize
}

let keySizeBytes = size.bitCount / 8
keyData = keyData.subdata(in: 0..<keySizeBytes)

guard keyData.count >= keySizeBytes else { throw CryptoKitError.incorrectKeySize }
self.init(data: keyData)
} }

Encryption & Decryption code snipet:

func aesgcmEncryptDecrypt() {
        let str : String = "FwhXRYJ$xLf?^Kh6_&YfTJ%RuG+EqcTY"    
        var key : SymmetricKey = SymmetricKey(size: .bits256)
        do{
            key = try SymmetricKey(string: str)
        }catch{        
        }
        let plain = "HOW ARE YOU?"
        let nonce = try! AES.GCM.Nonce(data: Data(base64Encoded: "fv1nixTVoYpSvpdA")!)
        let tag = Data(base64Encoded: "e1eIgoB4+lA/j3KDHhY4BQ==")!
        // Encrypt
        let sealedBox = try! AES.GCM.seal(plain.data(using: .utf8)!, using: key, 
        nonce: nonce, authenticating: tag)
        // Decrypt
        let sealedBoxRestored = try! AES.GCM.SealedBox(combined: sealedBox.combined!)
        let decrypted = try! AES.GCM.open(sealedBoxRestored, using: key, 
        authenticating: tag)
        Swift.print("Combined:\n\(sealedBox.combined!.base64EncodedString())\n")
        Swift.print("Cipher:\n\(sealedBox.ciphertext.base64EncodedString())\n")
        Swift.print("Nonce:\n\(nonce.withUnsafeBytes { 
            Data(Array($0)).base64EncodedString() })\n")
        Swift.print("Tag:\n\(tag.base64EncodedString())\n")
        Swift.print("Decrypted:\n\(String(data: decrypted, encoding: .utf8)!)\n")
    }
Our(generated from this code & .Net code) encrypted text is not matching. Anyone can help me, what I am doing wrong, detailing will be more helpful. Basically I was looking for saloution in Objective-C but I did not get any supported library for Objective-C.

GetComputerObjectNameW Win32 equivalent iOS API

rajneshmalik — Fri, 26 Mar 2021 08:34:00 GMT

Hi All,

There is GetComputerObjectNameW win32 api at below link. Could someone tell me what is equivalent api. I want to use it for iOS C objective program.

GetComputerObjectNameW function (secext.h) - Win32 apps | Microsoft Docs[^]

macos offset value

dsec12 — Fri, 26 Feb 2021 05:58:00 GMT

how to find macos offset value

macos 10.15.1 = 0xA21F

how to find other macos systems. some one tell me

joke

Member 14908996 — Fri, 07 Aug 2020 09:55:00 GMT

IOS

Member 14908996 — Fri, 07 Aug 2020 10:16:00 GMT

Is the functionality of IOS better than android or not?

Webview or Native App for electronic signature form

jlmto — Thu, 16 Jan 2020 07:40:00 GMT

Hi all,
I am new to IOS but my company policies to use ipad for document signing.
I have a question.
Could you guide me how to start in IOS to build this kind of app ?
Native or webview or hybrid ?
Can i use the on device signature of Ipad to capure and store it ?

Many thanks

What is free solution to intergrate Digital Signature to App

Member 14714062 — Sun, 12 Jan 2020 17:29:00 GMT

Hi all,
I am looking for a solution to hire a team to write an app will load data from sql server to a form and digital signature.
Could you suggest me a solution ?
It take me a lot of pressure to do this task

How to create folder on IOS device in Cordova

Aravindba — Wed, 23 Oct 2019 10:27:00 GMT

Hi,
I am developing ios app, in that need to create folder on ios device, i am using following code to create folder named "FT2019" ,is it my code is correct ? if correct then how see that folder on ios device physically.

if (device.platform.toLowerCase() == "android") {
                window.resolveLocalFileSystemURL(cordova.file.externalRootDirectory, onFileSystemSuccess, onError);
            } else {
                window.requestFileSystem(LocalFileSystem.PERSISTENT, 0, onFileSystemSuccess, onError);
            }



function onFileSystemSuccess(fileSystem) {
            var entry = "";
            if (device.platform.toLowerCase() == "android") {
                entry = fileSystem;
            } else {
                entry = fileSystem.root;
            }
            entry.getDirectory("FT2019", {
                create: true,
                exclusive: false
            }, onGetDirectorySuccess, onGetDirectoryFail);
        };



        function onError(e) {
            alert("Fail to get folder");
        };




        function onGetDirectorySuccess(dir) {
            dummyFilePath = dir.toURL();
        };


        function onGetDirectoryFail(dir) {
            alert("Fail to get folder");
        };

Regards
Aravindb

How do I unwrap an optional within a struct and use an if statement to print the optional?

WilliamChen7 — Wed, 24 Jul 2019 18:06:00 GMT

I am getting an error message for my use of nil and I am confused on how to properly unwrap the optional while placing it in an if statement to print out a string.

Swift

struct DatingProfile{
      var Name: String
      var Age: Int
      var City: String
      var FavoriteMovie: String? 
      var Hobbies: String?
     
    }
    
    let myDatingProfile = DatingProfile(Name: "William", Age: 30, City: "North Hollywood", FavoriteMovie: nil , Hobbies: "Basketball")
    
    if let myFavoriteMovie = FavoriteMovie = nil{
      print("\(Name) does not have a favorite movie")
       
    }else {
      
        print(myDatingProfile.FavoriteMovie)
      }
      
    }

exit status 1
main.swift:12:26: error: use of unresolved identifier 'FavoriteMovie'
if let myFavoriteMovie = FavoriteMovie = nil{
^~~~~~~~~~~~~
main.swift:13:12: error: use of unresolved identifier 'Name'
print("\(Name) does not have a favorite movie")
^~~~
main.swift:17:11: warning: expression implicitly coerced from 'String?' to 'Any'
print(myDatingProfile.FavoriteMovie)
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
main.swift:17:27: note: provide a default value to avoid this warning
print(myDatingProfile.FavoriteMovie)
~~~~~~~~~~~~~~~~^~~~~~~~~~~~~
?? <#default value#>
main.swift:17:27: note: force-unwrap the value to avoid this warning
print(myDatingProfile.FavoriteMovie)
~~~~~~~~~~~~~~~~^~~~~~~~~~~~~
!
main.swift:17:27: note: explicitly cast to 'Any' with 'as Any' to silence this warning
print(myDatingProfile.FavoriteMovie)
~~~~~~~~~~~~~~~~^~~~~~~~~~~~~
as Any
main.swift:20:1: error: extraneous '}' at top level
}
^

How to remove MDM profile installed on 2018 iPad Pro 256GB model?

TovinoThomas — Wed, 12 Jun 2019 06:45:00 GMT

I got a free iPad from my college, and I need to remove any possibility of them locking it down. How do I do this? Also what factors do they need to remotely lock it down using the mdm profile? Do I need to be a certain distance from them? Do I need to be in the same country? Bcuz I’m currently over seas during summer vacation, so am I safe right now? The iPad is working as of right now. Oh and please don’t bother with convincing me not to do this, I know the risks involved and I’m still gonna do it, I’ve already made arrangements to transfer to another university , and I’m not paying to keep the iPad, I got the iPad 9months ago and I’ve grown attached to it, yet I can’t afford to pay for it, hence why I must remove the MDM profile, can someone tell me how? Or if there’s an easier way to prevent them from locking my iPad down remotely without removing the MDM profile and without me buying the iPad from them, then I’m all ears. Please help. Thanks.

iOS vs Android, what made you pick iOS?

TovinoThomas — Wed, 12 Jun 2019 06:45:00 GMT

I am a long time Android user who started learning iOS development a while back and switched to learning Android. Wondering if I made the wrong decision. There is far more content available for iOS than Android, but as an Android user I'm struggling on a decision. I'm not really in a position to buy a new phone.

What made you pick iOS over Android?

I try to create a path between two planets, I have no compilation error but I do not understand why there is nothing that appears on my simulator

Member 14197715 — Tue, 26 Mar 2019 13:55:00 GMT

I create a mobile shooting video game, I would like to create a line between each planet (8 planets in total) to form a path but I do not understand why my line does not appear. Here is my code: I want to say that I start in Swift and Spritekit.

Here is my code

 var line = SKShapeNode()
            let path = CGMutablePath()
            path.addLines(between: [CGPoint(x: size.width * 0.3 , y: size.height * 0.9), CGPoint(x: self.size.width/2, y: self.size.height/1.22)])
            line.path = bezierPath.cgPath
            line.strokeColor = SKColor.red
            line.lineWidth = 2
            addChild(line)

xamarin forms cropping in ios

Member 14141589 — Wed, 06 Feb 2019 15:04:00 GMT

in the link bellow I had a project with the cropping just in ios, I had a problem with the quality of the image after cropping, I don't know where I've done wrong. iwish someone would help on it.

GitHub - SoniaCH/CroppingIOS: this is a croppin of an image with ios[^]

Azure Devops not creating IPA file for Xamarin iOS build

Dominic Burford — Fri, 05 Oct 2018 10:30:00 GMT

I have a Xamarin.Forms app that I am building using Azure DevOps. I am using Visual Studio 2017 15.8.1. The build step for the project completes without any errors, but the Publish step fails to copy the IPA file as one hasn't been created.

The build log shows the following MSBUILD generated statement that the build invoked.

msbuild IFMDriverServices.iOS.csproj /p:Configuration=Release /p:Platform=iPhoneSimulator /p:BuildIpa=true /p:Codesignkey=identity /p:CodesignProvision=123456

I have tasks that successfully install the Apple certificate and mobile provisioning that run before the build task.

What am I missing? How do I create the IPA file?

"There are two ways of constructing a software design: One way is to make it so simple that there are obviously no deficiencies, and the other way is to make it so complicated that there are no obvious deficiencies. The first method is far more difficult." - C.A.R. Hoare

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please help translate objc c to swift

Member 11829514 — Sun, 03 Jun 2018 17:21:00 GMT

NSURLRequest *request = [BNGAccount loginWithUserName:username password:password product:product redirectUrl:[scheme stringByAppendingString:@"://ios.betfair.com/login"] completionBlock:^(NSString *ssoKey, NSError *connectionError, BNGAPIError *apiError) {

      if (!connectionError && !apiError && ssoKey.length) {
          // once we have the ssoKey back from the login API call, we should set it in the shared instance so other API calls can make use of it.
          [APING sharedInstance].ssoKey = ssoKey;
          // lets see if we can figure out the account details for this user
          [self getAccountFunds];
      } else {
          [self logError:@"There was an error while logging in %@ %@" connectionError:connectionError apiError:apiError];
      }
  }];

Objective-C