title: Thread 1: signal SIGABRT AppDelegate.swift
body: <p>I tried to compile my first iOS Hello app.</p>
  <h1>I have</h1>
  <p><strong>ViewController.swift</strong></p>
  <pre><code>//
  //  ViewController.swift
  //  My First Project
  
  import UIKit
  
  class ViewController: UIViewController {
  
      // Declare components
      @IBOutlet weak var inputLabel: UILabel!
      
      
      
      override func viewDidLoad() {
          super.viewDidLoad()
          // Do any additional setup after loading the view, typically from a nib.
          
          
      }
  
      @IBAction func submitBtn(_ sender: Any) {
          inputLabel.text = &quot;Hello World&quot;
          
      }
      
      
      override func didReceiveMemoryWarning() {
          super.didReceiveMemoryWarning()
          // Dispose of any resources that can be recreated.
      }
  
  
  }
  </code></pre>
  <hr />
  <h1>I Kept</h1>
  <p>getting <code>Build Succeeded</code></p>
  <p><a href="https://i.stack.imgur.com/lHvoz.png" rel="noreferrer"><img src="https://i.stack.imgur.com/lHvoz.png" alt="enter image description here" /></a></p>
  <p>But after about 5 seconds, I got this</p>
  <p><a href="https://i.stack.imgur.com/zgQzq.png" rel="noreferrer"><img src="https://i.stack.imgur.com/zgQzq.png" alt="enter image description here" /></a></p>
  <hr />
  <h1>Console Error</h1>
  <p><a href="https://i.stack.imgur.com/1oidL.jpg" rel="noreferrer"><img src="https://i.stack.imgur.com/1oidL.jpg" alt="enter image description here" /></a></p>
  <pre><code>         0x0000000103915f69 -[UIApplication workspaceDidEndTransaction:] + 188
      18  FrontBoardServices                  0x000000010770f723 __FBSSERIALQUEUE_IS_CALLING_OUT_TO_A_BLOCK__ + 24
      19  FrontBoardServices                  0x000000010770f59c -[FBSSerialQueue _performNext] + 189
      20  FrontBoardServices                  0x000000010770f925 -[FBSSerialQueue _performNextFromRunLoopSource] + 45
      21  CoreFoundation                      0x0000000105ff0311 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
      22  CoreFoundation                      0x0000000105fd559c __CFRunLoopDoSources0 + 556
      23  CoreFoundation                      0x0000000105fd4a86 __CFRunLoopRun + 918
      24  CoreFoundation                      0x0000000105fd4494 CFRunLoopRunSpecific + 420
      25  UIKit                               0x00000001039147e6 -[UIApplication _run] + 434
      26  UIKit                               0x000000010391a964 UIApplicationMain + 159
      27  My First Project                    0x0000000102e6db3f main + 111
      28  libdyld.dylib                       0x0000000106f7868d start + 1
      29  ???                                 0x0000000000000001 0x0 + 1
  )
  libc++abi.dylib: terminating with uncaught exception of type NSException
  (lldb) 
  </code></pre>
  <hr />
  <h1>Try #1</h1>
  <h2>Connection Inspector</h2>
  <p>I used to have this</p>
  <p><a href="https://i.stack.imgur.com/9xvIy.png" rel="noreferrer"><img src="https://i.stack.imgur.com/9xvIy.png" alt="enter image description here" /></a></p>
  <p>I updated to this</p>
  <p><a href="https://i.stack.imgur.com/PliRm.png" rel="noreferrer"><img src="https://i.stack.imgur.com/PliRm.png" alt="enter image description here" /></a></p>
  <p>Re-run and still happening ...</p>
  <hr />
  <h1>Try #2</h1>
  <h2>Clean project</h2>
  <p>Re-run and still happening ...</p>