I have the exact same issue with Xcode 7.3.

Restarting the IDE helps.

I had similar issue with Xcode 9.3 and solution mentioned by @sssliver didn’t worked. 

[![Screenshot added][1]][1]

Below is solution that worked :

1. `Quit Xcode (cmd + Q)` and reopen project
2. `Delete derived data` content. 
3. `Clean project (cmd + shift + K)`
4. `Build project (cmd + B)`


  [1]: https://i.stack.imgur.com/d3WLG.png

On Xcode 11 when I changed my app folder location, I got this error and thats was because Swift Package Manager was redownloading my project libraries, once it finished downloading, it worked again...

**This error occurs usually when you open a project in 2 Xcode versions or
When project is opened in one Xcode and you are trying to open that in other Xcode versions.**

**Here are the steps to follow:-**
1. Quit both Xcode by (cmd + Q)
2. Open Xcode

**If problem still exists then**

3. Clean build folder
4. Build project
5. Run

Below solution worked for me:

Quit Xcode (cmd + Q) and reopen project
Delete derived data content.
Clean project (cmd + shift + K)
Build project (cmd + B)

Below is solution that worked for me:

Quit Xcode (cmd + Q) and reopen project

Delete derived data content.

Clean project (cmd + shift + K)

Restart Mac

Build project (cmd + B)

I am using Mocha, Chai, Karma, Sinon, Webpack for Unit tests.

I followed this link to configure my testing environment for React-Redux Code.

[How to implement testing + code coverage on React with Karma, Babel, and Webpack][1]

I can successfully test my action and reducers javascript code, but when it comes to testing my components it always throw some error.



    import React from &#39;react&#39;;
    import TestUtils from &#39;react/lib/ReactTestUtils&#39;; //I like using the Test Utils, but you can just use the DOM API instead.
    import chai from &#39;chai&#39;;
    // import sinon from &#39;sinon&#39;;
    import spies from &#39;chai-spies&#39;;
    
    chai.use(spies);
    
    let should = chai.should()
      , expect = chai.expect;
    
    import { PhoneVerification } from &#39;../PhoneVerification&#39;;
    
    let fakeStore = {
    	  &#39;isFetching&#39;: false,
    	  &#39;usernameSettings&#39;: {
    	    &#39;errors&#39;: {},
    	    &#39;username&#39;: &#39;sahil&#39;,
    	    &#39;isEditable&#39;: false
    	  },
    	  &#39;emailSettings&#39;: {
    	    &#39;email&#39;: &#39;test@test.com&#39;,
    	    &#39;isEmailVerified&#39;: false,
    	    &#39;isEditable&#39;: false
    	  },
    	  &#39;passwordSettings&#39;: {
    	    &#39;errors&#39;: {},
    	    &#39;password&#39;: &#39;showsomestarz&#39;,
    	    &#39;isEditable&#39;: false
    	  },
    	  &#39;phoneSettings&#39;: {
    	    &#39;isEditable&#39;: false,
    	    &#39;errors&#39;: {},
    	    &#39;otp&#39;: null,
    	    &#39;isOTPSent&#39;: false,
    	    &#39;isOTPReSent&#39;: false,
    	    &#39;isShowMissedCallNumber&#39;: false,
    	    &#39;isShowMissedCallVerificationLink&#39;: false,
    	    &#39;missedCallNumber&#39;: null,
    	    &#39;timeLeftToVerify&#39;: null,
    	    &#39;_verifiedNumber&#39;: null,
    	    &#39;timers&#39;: [],
    	    &#39;phone&#39;: &#39;&#39;,
    	    &#39;isPhoneVerified&#39;: false
    	  }
    }
    
    function setup () {
    	console.log(PhoneVerification);
    	// PhoneVerification.componentDidMount = chai.spy();
    	let output = TestUtils.renderIntoDocument(&lt;PhoneVerification {...fakeStore}/&gt;);
    	return {
    		output
    	}
    }
    
    describe(&#39;PhoneVerificationComponent&#39;, () =&gt; {
    	it(&#39;should render properly&#39;, (done) =&gt; {
    		const { output } = setup();
    		expect(PhoneVerification.prototype.componentDidMount).to.have.been.called;
    		done();
    	})
    });

This following error comes up with above code.

    FAILED TESTS:
      PhoneVerificationComponent
        ✖ should render properly
          Chrome 48.0.2564 (Mac OS X 10.11.3)
        Error: Invariant Violation: Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: undefined.

Tried switching from sinon spies to chai-spies.

How should I unit test my React-Redux Connected Components(Smart Components)? 


  [1]: https://medium.com/@scbarrus/how-to-get-test-coverage-on-react-with-karma-babel-and-webpack-c9273d805063#.7kcckz73r

How to Unit Test React-Redux Connected Components?

In the laravel framework we can use blade to add PHP code in html file.&lt;br&gt;
We are using both `{{ }}` and `{!! !!}` syntax in blade files of Laravel. &lt;br&gt;
What is the difference between them?

What is the difference between {{ }} and {!! !!} in laravel blade files?

I got this message, which is as follows.

[![Build operations alert][1]][1]


Then again I tried to rebuild it, which lead me to this alert message.
[![enter image description here][2]][2]


Now if I select Xcode Version, it starts throwing error which is related to the dependency of the external libraries I have added. Any suggestion.
[![enter image description here][3]][3]


  [1]: http://i.stack.imgur.com/gP7vn.png
  [2]: http://i.stack.imgur.com/8zEGz.png
  [3]: http://i.stack.imgur.com/JrU98.png

Build operations are disabled:&#39;project.xcworkspace&#39; has changed and is reloading

I got this message, which is as follows.
<a href="http://i.stack.imgur.com/gP7vn.png" target="_blank" rel="noopener noreferrer"><img src="http://i.stack.imgur.com/gP7vn.png" alt="Build operations alert"></a>
Then again I tried to rebuild it, which lead me to this alert message.
<a href="http://i.stack.imgur.com/8zEGz.png" target="_blank" rel="noopener noreferrer"><img src="http://i.stack.imgur.com/8zEGz.png" alt="enter image description here"></a>
Now if I select Xcode Version, it starts throwing error which is related to the dependency of the external libraries I have added. Any suggestion.
<a href="http://i.stack.imgur.com/JrU98.png" target="_blank" rel="noopener noreferrer"><img src="http://i.stack.imgur.com/JrU98.png" alt="enter image description here"></a>

I&#39;m hitting an API that will occasionally throw a HTTP 403 error, and the response body can give some extra information in the form of json, however for the life of me I can&#39;t seem to get the information back out from the Alamofire response objects.  I see the information in developer tools if I hit the API via chrome.  Here&#39;s my code:

    Alamofire.request(mutableURLRequest).validate().responseJSON() {
        (response) in
        switch response.result {
            case .Success(let data):
                if let jsonResult = data as? NSDictionary {
                    completion(jsonResult, error: nil)
                } else if let jsonArray = data as? NSArray {
                    let jsonResult = [&quot;array&quot; : jsonArray]
                    completion(jsonResult, error: nil)
                }
            case .Failure(let error):
                //error tells me 403
                //response.result.data can&#39;t be cast to NSDictionary or NSArray like
                //the successful cases, how do I get the response body?
        }

I&#39;ve queried pretty much every object attached to the response, but it doesn&#39;t seem to give me the response body back in the case of HTTP errors.  Is there a work-around or something I&#39;m missing here?

Any way to get the response body during HTTP errors?

I upgraded my latest project to React Native 0.19 and instantly the video no longer works. How can I create a new project with a specific version? I want to init a new project at version 0.18.1. I did some google searches but couldn&#39;t find anything about this.

    $ react-native init newproject --verbose

I&#39;m guessing I need to add the word @18.1 in there somewhere but can&#39;t get that to work.

React Native init specific version

I want to have init from rawValue for my enum in Swift to return default value if rawValue init will return nil.
Right now I have something like this:

    public init(fromRawValue: String){
            self = Language(rawValue: fromRawValue) ?? .English
    }

I don&#39;t like this because it is completely new initializer.
I tried to make something like this:

    public init(rawValue: String){
            self = Language(rawValue: fromRawValue) ?? .English
    }
But I have got runtime exception with bad access. Can I somehow make it work or I just have to use this new and I cannot override original one to not be optional?

I would like to know if it possible to override original init from rawValue not workaround with completely new one that is using failable one.

Overriding Enum init?(rawValue: String) to not be optional

do while loop in Swift

I want to extract the dSYM file from but when I click on _&quot;Download dSYMs...&quot;_ in the _Organizer_ I get the follow message: &quot;There are no dSYMs available for download.&quot;. 

I&#39;m using Xcode 7.2 with a workspace generated by Cocoapods 0.39. 

How can I get them?

[![enter image description here][1]][1]


  [1]: http://i.stack.imgur.com/bSdOQ.png

Xcode - There are no dSYMs available for download

I have created certificate to enable Push Services in my app, but every time I try to add certificate in my Keychain, after adding certificate it shows me following error:

**This certificate has an invalid issuer**

[![enter image description here][1]][1]


  [1]: http://i.stack.imgur.com/1DKBI.png


This certificate has an invalid issuer Apple Push Services

I&#39;m trying to upload my iOS app archive to iTunes Connect using Xcode, but when I click &quot;Upload to App Store&quot; I get the error:

&gt; Xcode attempted to locate or generate matching signing assets and
&gt; failed to do so because of the following issues. Missing iOS
&gt; Distribution signing identity for _____. Xcode can request one for
&gt; you.

I&#39;m really confused, because I had just successfully uploaded an archive for the same app about 2 hours earlier, and then I needed to make one simple fix and then needed to reupload the archive, and now I&#39;m getting this error. I did not touch anything else.

I&#39;ve done everything that I can think of to try fixing the problem, I restarted Xcode, my computer, went to Xcode preferences to click &#39;Download All&#39; on the provisioning profiles, clicked &quot;Reset&quot; on the iOS Distribution on the same page, downloaded again the iOS distribution profile from the member center, went to the code signing settings in my app&#39;s build settings and manually set the release signing identity to the iOS distribution profile, and rearchived several times. 

Update: Turns out it&#39;s due to the WWDRCA expiring today: https://developer.apple.com/support/certificates/expiration/
There are a lot of other people experiencing the same issue. I was able to temporarily bypass the issue by changing the date on my computer back 1 day.

Uploading archive error: &quot;Missing iOS Distribution signing identity for ...&quot;

I deleted all my provisioning profiles from my Mac by mistake (`Library/Mobile Device/Provisioning Profiles`). Now, no matter what I do, Xcode gives me this error:
&gt; Missing iOS Distribution signing identity

How can I fix this?

Missing iOS Distribution signing identity

Keychain shows all the certificates as Invalid in my keychain suddenly, as it working before 2 days and i also check in Developer portal and it shows valid there. It marks each and every certificate in Keychain as **&quot;This certificate has invalid issuer&quot;** . As message suggesting that it must be problem from issuer side and and our issuer is Apple. So how to fix it ?

This certificate has an invalid issuer

Here i posting image of keychain. I need quick help.

[![enter image description here][1]][1]


  [1]: http://i.stack.imgur.com/2QglP.png

This certificate has an invalid issuer : Keychain marks all certificates as &quot;Invalid Issuer&quot;

When trying to push an update to my cocoapod framework to the repo with ```pod trunk push``` as mentioned in the title, I get the following error:

&gt; [!] Authentication token is invalid or unverified. Either verify it with the email that was sent or register a new session.

I&#39;ve updated the cocoapod before, how do I verify my email or session?

Edit: Sometimes I also get the error: `[!] You need to register a session first.`

Error when trying to run `pod trunk push [cocoapod].podspec`

I have some protocols

**LoginStrategy**

    public protocol LoginStrategy {
        func login(_ viewController: UIViewController)
        func getUserInfo(withCompletionHandler completionHandler: @escaping (_ userInfo: [String: Any]?) -&gt; ())
        func createLoginButton(_ frame: CGRect, withCompletionHandler completionHandler: @escaping (_ loginButton: UIView) -&gt; ())
        func getUserId() -&gt; String
    }

and two classes:

**LoginProvider**

    public class LoginProvider {
        
        public let strategy: LoginStrategy
        
        public func login(_ viewController: UIViewController) {
            return self.strategy.login(viewController)
        }
        
        public func getUserInfo(withCompletionHandler completionHandler: @escaping (_ userInfo: [String: Any]?) -&gt; ()) {
            return self.strategy.getUserInfo(withCompletionHandler: completionHandler)
        }
        
        public func createLoginButton(_ frame: CGRect, withCompletionHandler completionHandler: @escaping (_ loginButton: UIView) -&gt; ()) {
            return self.strategy.createLoginButton(frame, withCompletionHandler: completionHandler)
        }
        
        public func getUserId() -&gt; String {
            return self.strategy.getUserId()
        }
        
        public init(strategy: LoginStrategy) {
            self.strategy = strategy
        }
        
    }

**FacebookLoginStrategy**

    import Foundation
    import FacebookCore
    import FacebookLogin
    
    public class FacebookLoginStrategy: LoginStrategy {
        
        public var grantedPermissions: Set&lt;Permission&gt;? = nil
    
        public var declinedPermissions: Set&lt;Permission&gt;? = nil
        
        public var userId: String = &quot;&quot;
        
        public func login(_ viewController: UIViewController) {
            let loginManager = LoginManager()
            let permissions: [ReadPermission] = [.publicProfile, .userFriends, .email]
            loginManager.logIn(permissions, viewController: viewController) { loginResult in
                switch loginResult {
                case .failed(let error):
                    print(error)
                case .cancelled:
                    print(&quot;User cancelled login.&quot;)
                case .success(let grantedPermissions, let declinedPermissions, let accessToken):
                    self.userId = accessToken.userId ?? &quot;&quot;
                    self.grantedPermissions = grantedPermissions
                    self.declinedPermissions = declinedPermissions
                    print(&quot;Logged in!&quot;)
                }
            }
        }
        
        public func getUserId() -&gt; String {
            return userId
        }
        
        public func getUserInfo(withCompletionHandler completionHandler: @escaping (_ userInfo: [String: Any]?) -&gt; ()) {
            let request = GraphRequest(graphPath: &quot;me&quot;, parameters: [&quot;fields&quot;:&quot;email, name&quot;], accessToken: AccessToken.current, httpMethod: .GET, apiVersion: FacebookCore.GraphAPIVersion.defaultVersion)
            request.start { (response, result) in
                switch result {
                case .success(let value):
                    print(value.dictionaryValue)
                    completionHandler(value.dictionaryValue)
                case .failed(let error):
                    print(error)
                }
            }
        }
    
        public func createLoginButton(_ frame: CGRect, withCompletionHandler completionHandler: @escaping (_ loginButton: UIView) -&gt; ()) {
            let permissions: [ReadPermission] = [.publicProfile, .userFriends, .email]
            let loginButton = LoginButton(readPermissions: permissions)
            loginButton.frame = frame
            completionHandler(loginButton)
        }
    }

In my **ViewController**:

When I use:

    let facebookLoginProvider = LoginProvider(strategy: FacebookLoginStrategy())

It says:

&gt; &#39;FacebookLoginStrategy&#39; is inaccessable due to &#39;internal&#39; protection
&gt; level


Initializer is inaccessable due to &#39;internal&#39; protection level

I have used `use_frameworks!` in CocoaPods `Podfile` many times. I just wonder why do we use it? I couldn&#39;t get the straight forward answer of it.

Example:

    platform :ios, &#39;8.0&#39;
    use_frameworks!
    
    target &quot;CityWhether&quot; do
        pod &#39;Alamofire&#39;
        pod &#39;SwiftyJSON&#39;
    end

Why do we use use_frameworks! in CocoaPods?

I&#39;m using Vuetify.js components for my front-end in Vue.js and want to create a user registration form with file upload. I&#39;m able to create the form using `v-text-field` (a Vuetify component). 

 - How can I upload the file that is selected (input)?
 - Which component should I use or is there any other alternative way?

File upload in vuetify

I&#39;m in the sort of rapid prototyping phase of my React/javascript learning experience. I was wondering when folks would reach for a framework such as Next.js or Gatsby.js vs the standard Create React App.

I really dig the page based structuring and prospect for preloading links of Next.js. However, I&#39;m not sure when you would reach for Next as apposed to CRA or even ejected CRA.

Thanks!

Content Type	Original Author	Original Content on Stackoverflow
Question	Kumar Utsav	View Question on Stackoverflow
Solution 1 - Ios	sssilver	View Answer on Stackoverflow
Solution 2 - Ios	Jayprakash Dubey	View Answer on Stackoverflow
Solution 3 - Ios	Ahmadreza	View Answer on Stackoverflow
Solution 4 - Ios	Javed Iqbal	View Answer on Stackoverflow
Solution 5 - Ios	Abhishek Singh	View Answer on Stackoverflow
Solution 6 - Ios	Ankish Jain	View Answer on Stackoverflow

Build operations are disabled:'project.xcworkspace' has changed and is reloading

Ios Problem Overview

Ios Solutions

Solution 1 - Ios

Solution 2 - Ios

Solution 3 - Ios

Solution 4 - Ios

Solution 5 - Ios

Solution 6 - Ios

What is the difference between {{ }} and {!! !!} in laravel blade files?

How to Unit Test React-Redux Connected Components?

Attributions