title: ios- Apple Mach-O Linker Error
body: <p>So I used <code>pod deintegrate</code> on my xCode project and then when I subsequently did <code>pod install</code>, I get the following Buildtime errors.</p>
  
  <p>I have no idea why this is happening, it was working before I deintegrated.
    Apple Mach-O Linker Error Group</p>
  
  <p>I've tried cleaning the project and deleting and re-adding the ViewController, which was suggested in other answers. Did not work.</p>
  
  <pre><code>  "type metadata accessor for Alamofire.Result", referenced from:
  
    "Alamofire.(request (Alamofire.URLConvertible, method : Alamofire.HTTPMethod, parameters : [Swift.String : Any]?, encoding : Alamofire.ParameterEncoding, headers : [Swift.String : Swift.String]?) -&gt; Alamofire.DataRequest).(default argument 1)", referenced from:
  
    "Alamofire.(request (Alamofire.URLConvertible, method : Alamofire.HTTPMethod, parameters : [Swift.String : Any]?, encoding : Alamofire.ParameterEncoding, headers : [Swift.String : Swift.String]?) -&gt; Alamofire.DataRequest).(default argument 2)", referenced from:
  
    "SwiftyJSON.JSON.init (Any) -&gt; SwiftyJSON.JSON", referenced from:
  
    "protocol witness table for Swift.Int : SwiftyJSON.JSONSubscriptType in SwiftyJSON", referenced from:
  
    "SwiftyJSON.JSON.subscript.getter : ([SwiftyJSON.JSONSubscriptType]...) -&gt; SwiftyJSON.JSON", referenced from:
  
    "Alamofire.Result.value.getter : A?", referenced from:
  
    "protocol witness table for Swift.String : Alamofire.URLConvertible in Alamofire", referenced from:
  
    "protocol descriptor for SwiftyJSON.JSONSubscriptType", referenced from:
  
    "protocol witness table for Alamofire.JSONEncoding : Alamofire.ParameterEncoding in Alamofire", referenced from:
  
    "SwiftyJSON.JSON.arrayValue.getter : [SwiftyJSON.JSON]", referenced from:
  
    "static Alamofire.JSONEncoding.default.getter : Alamofire.JSONEncoding", referenced from:
  
    "Alamofire.(request (Alamofire.URLConvertible, method : Alamofire.HTTPMethod, parameters : [Swift.String : Any]?, encoding : Alamofire.ParameterEncoding, headers : [Swift.String : Swift.String]?) -&gt; Alamofire.DataRequest).(default argument 3)", referenced from:
  
    "type metadata for Alamofire.JSONEncoding", referenced from:
  
    "static SwiftyJSON.JSON.null.getter : SwiftyJSON.JSON", referenced from:
  
    "Alamofire.(request (Alamofire.URLConvertible, method : Alamofire.HTTPMethod, parameters : [Swift.String : Any]?, encoding : Alamofire.ParameterEncoding, headers : [Swift.String : Swift.String]?) -&gt; Alamofire.DataRequest).(default argument 4)", referenced from:
  
    "Alamofire.request (Alamofire.URLConvertible, method : Alamofire.HTTPMethod, parameters : [Swift.String : Any]?, encoding : Alamofire.ParameterEncoding, headers : [Swift.String : Swift.String]?) -&gt; Alamofire.DataRequest", referenced from:
  
    "type metadata for SwiftyJSON.JSON", referenced from:
  
    "Alamofire.DataRequest.(responseJSON (queue : __ObjC.DispatchQueue?, options : __ObjC.JSONSerialization.ReadingOptions, completionHandler : (Alamofire.DataResponse&lt;Any&gt;) -&gt; ()) -&gt; Self).(default argument 0)", referenced from:
  
    "protocol witness table for Swift.String : SwiftyJSON.JSONSubscriptType in SwiftyJSON", referenced from:
  
    "Alamofire.DataRequest.(responseJSON (queue : __ObjC.DispatchQueue?, options : __ObjC.JSONSerialization.ReadingOptions, completionHandler : (Alamofire.DataResponse&lt;Any&gt;) -&gt; ()) -&gt; Self).(default argument 1)", referenced from:
  
    "Alamofire.DataRequest.responseJSON (queue : __ObjC.DispatchQueue?, options : __ObjC.JSONSerialization.ReadingOptions, completionHandler : (Alamofire.DataResponse&lt;Any&gt;) -&gt; ()) -&gt; Self", referenced from:
  
  clang: error: linker command failed with exit code 1 (use -v to see invocation)`
  </code></pre>