UIWebView not showing website - ios

Question

I have created some simple code designed to show a webpage, which has been working perfectly fine since I created it. However, when I now run the app, the UIWebView no longer displays the webpage, although the NSLog shows the code is definitely being run.
In the .h: #property (weak, nonatomic) IBOutlet UIWebView *webView;
In the .m:
#synthesize webView;
- (void)viewDidLoad {
NSString *url = #"http://www.google.com";
[self createWebpage:url];
self.addressBar.delegate = self;
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
}
- (void) createWebpage:(NSString *)webString {
NSURL *url = [NSURL URLWithString:webString];
NSURLRequest *requestUrl = [NSURLRequest requestWithURL:url];
[self.webView loadRequest:requestUrl];
NSLog(#"Webpage is created!");
}
I recently (accidentally) deleted a Referencing Outlet between the back and forward UIButtons I had created. I say this in case it has anything to do with the problem. All help appreciated.
EDIT: I don't know why, but the app now does not load. It goes to the splash screen, and then errors, producing the error log below.
2014-09-21 14:19:14.273 Fullscreen Ninja Browser for iPhone 6[6673:349224] Webpage is created!
2014-09-21 14:19:14.278 Fullscreen Ninja Browser for iPhone 6[6673:349224] *** Assertion failure in -[NSLayoutConstraint constant], /SourceCache/Foundation_Sim/Foundation-1140.11/Layout.subproj/NSLayoutConstraint.m:643
2014-09-21 14:19:14.283 Fullscreen Ninja Browser for iPhone 6[6673:349224] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: '(null)'
*** First throw call stack:
(
0 CoreFoundation 0x0000000105a073f5 __exceptionPreprocess + 165
1 libobjc.A.dylib 0x00000001056a0bb7 objc_exception_throw + 45
2 CoreFoundation 0x0000000105a0725a +[NSException raise:format:arguments:] + 106
3 Foundation 0x00000001052be28f -[NSAssertionHandler handleFailureInMethod:object:file:lineNumber:description:] + 195
4 Foundation 0x000000010523a18d -[NSLayoutConstraint constant] + 170
5 Foundation 0x0000000105243ea3 -[NSLayoutConstraint _lowerIntoExpression:reportingConstantIsRounded:] + 197
6 Foundation 0x0000000105239dbe -[NSLayoutConstraint _addToEngine:integralizationAdjustment:mutuallyExclusiveConstraints:] + 96
7 UIKit 0x0000000106474495 __57-[UIView(AdditionalLayoutSupport) _switchToLayoutEngine:]_block_invoke_2 + 474
8 Foundation 0x0000000105247a8e -[NSISEngine withBehaviors:performModifications:] + 155
9 UIKit 0x000000010647429b __57-[UIView(AdditionalLayoutSupport) _switchToLayoutEngine:]_block_invoke + 452
10 UIKit 0x00000001064740ae -[UIView(AdditionalLayoutSupport) _switchToLayoutEngine:] + 197
11 UIKit 0x0000000106473d21 -[UIView(AdditionalLayoutSupport) _initializeHostedLayoutEngine] + 404
12 UIKit 0x0000000106468caf -[UIView(UIConstraintBasedLayout) _layoutEngine_windowDidChange] + 127
13 UIKit 0x0000000105e66d85 -[UIView(Internal) _didMoveFromWindow:toWindow:] + 207
14 UIKit 0x0000000105e5f9c2 __45-[UIView(Hierarchy) _postMovedFromSuperview:]_block_invoke + 125
15 UIKit 0x0000000105e5f936 -[UIView(Hierarchy) _postMovedFromSuperview:] + 437
16 UIKit 0x0000000105e69835 -[UIView(Internal) _addSubview:positioned:relativeTo:] + 1550
17 UIKit 0x0000000105e37f43 -[UIWindow addRootViewControllerViewIfPossible] + 452
18 UIKit 0x0000000105e38152 -[UIWindow _setHidden:forced:] + 276
19 UIKit 0x0000000105e4465c -[UIWindow makeKeyAndVisible] + 42
20 UIKit 0x0000000105def191 -[UIApplication _callInitializationDelegatesForMainScene:transitionContext:] + 2628
21 UIKit 0x0000000105df1e5c -[UIApplication _runWithMainScene:transitionContext:completion:] + 1350
22 UIKit 0x0000000105df0d22 -[UIApplication workspaceDidEndTransaction:] + 179
23 FrontBoardServices 0x00000001085a92a3 __31-[FBSSerialQueue performAsync:]_block_invoke + 16
24 CoreFoundation 0x000000010593cabc __CFRUNLOOP_IS_CALLING_OUT_TO_A_BLOCK__ + 12
25 CoreFoundation 0x0000000105932805 __CFRunLoopDoBlocks + 341
26 CoreFoundation 0x00000001059325c5 __CFRunLoopRun + 2389
27 CoreFoundation 0x0000000105931a06 CFRunLoopRunSpecific + 470
28 UIKit 0x0000000105df0799 -[UIApplication _run] + 413
29 UIKit 0x0000000105df3550 UIApplicationMain + 1282
30 Fullscreen Ninja Browser for iPhone 6 0x00000001051723c3 main + 115
31 libdyld.dylib 0x0000000107f7f145 start + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
(lldb)
Edit 2: I have discovered that when I "Add missing constraints" to my UIButton, the above error is caused. However, when I clear the constraints, the app runs fine, with the UIWebView showing the site. However, the buttons are out of place, as adding constraints causes the app to crash, annoyingly. Any solutions?

Answer 1

You need to call [super viewDidLoad], before loading your webView,
This should help to resolve your issue,
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
NSString *url = #"http://www.google.com";
[self createWebpage:url];
self.addressBar.delegate = self;
}