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iOS Build a Simple iPhone App with Swift Improving Our User Interface Adding a Pop of Color

Posted by Charlie Maréchal
Charlie Maréchal
7,001 Points

Hi, I follow your instructions, but when it comes to change the color of the text in the button, I get a message error..

*error message

My code is the same as the one in the video, but then I get an error message that says : thread 1: SIGABRT...

Here is the error rapport :

2015-06-04 23:32:14.054 FunFact[7465:922654] Unknown class ViewController in Interface Builder file. 2015-06-04 23:32:14.063 FunFact[7465:922654] *** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<UIView 0x7f93b1d285d0> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key funFactButton.' *** First throw call stack: ( 0 CoreFoundation 0x0000000109d24c65 exceptionPreprocess + 165 1 libobjc.A.dylib 0x000000010b88fbb7 objc_exception_throw + 45 2 CoreFoundation 0x0000000109d248a9 -[NSException raise] + 9 3 Foundation 0x000000010a142b53 -[NSObject(NSKeyValueCoding) setValue:forKey:] + 259 4 UIKit 0x000000010a6436be -[UIView(CALayerDelegate) setValue:forKey:] + 149 5 CoreFoundation 0x0000000109c6cd50 -[NSArray makeObjectsPerformSelector:] + 224 6 UIKit 0x000000010a89b52b -[UINib instantiateWithOwner:options:] + 1506 7 UIKit 0x000000010a6f3718 -[UIViewController _loadViewFromNibNamed:bundle:] + 242 8 UIKit 0x000000010a6f3d08 -[UIViewController loadView] + 109 9 UIKit 0x000000010a6f3f79 -[UIViewController loadViewIfRequired] + 75 10 UIKit 0x000000010a6f440e -[UIViewController view] + 27 11 UIKit 0x000000010a60f2c9 -[UIWindow addRootViewControllerViewIfPossible] + 58 12 UIKit 0x000000010a60f68f -[UIWindow _setHidden:forced:] + 247 13 UIKit 0x000000010a61be21 -[UIWindow makeKeyAndVisible] + 42 14 UIKit 0x000000010a5bf457 -[UIApplication _callInitializationDelegatesForMainScene:transitionContext:] + 2732 15 UIKit 0x000000010a5c21de -[UIApplication _runWithMainScene:transitionContext:completion:] + 1349 16 UIKit 0x000000010a5c10d5 -[UIApplication workspaceDidEndTransaction:] + 179 17 FrontBoardServices 0x000000010d39f5e5 __31-[FBSSerialQueue performAsync:]_block_invoke_2 + 21 18 CoreFoundation 0x0000000109c5841c __CFRUNLOOP_IS_CALLING_OUT_TO_A_BLOCK + 12 19 CoreFoundation 0x0000000109c4e165 __CFRunLoopDoBlocks + 341 20 CoreFoundation 0x0000000109c4df25 __CFRunLoopRun + 2389 21 CoreFoundation 0x0000000109c4d366 CFRunLoopRunSpecific + 470 22 UIKit 0x000000010a5c0b42 -[UIApplication _run] + 413 23 UIKit 0x000000010a5c3900 UIApplicationMain + 1282 24 FunFact 0x000000010974f557 main + 135 25 libdyld.dylib 0x000000010bfe7145 start + 1 26 ??? 0x0000000000000001 0x0 + 1 ) libc++abi.dylib: terminating with uncaught exception of type NSException

Please help me :-)

3 Answers

Chris Adamson
Chris Adamson
132,143 Points
Chris Adamson
Chris Adamson
132,143 Points

That is a lot of error log, do you have the code you were trying to execute?

Charlie Maréchal
Charlie Maréchal
7,001 Points
Charlie Maréchal
Charlie Maréchal
7,001 Points

Sure !

@IBOutlet weak var funFactButton: UIButton!

@IBAction func PushMe(sender: AnyObject) {
    var randomColor = colorWheel.randomColor()
    view.backgroundColor = randomColor
  funFactButton.tintColor = colorWheel.randomColor()
   TexteChange.text = factBook.randomFact()

}
Steven Jemmott
Steven Jemmott
8,109 Points
Steven Jemmott
Steven Jemmott
8,109 Points

Check you interface builder for the UIButton object. I suspect either the name of the property was changed without deleting the previous instance OR the UIButton isn't connected to the object in Interface Builder.