Webview not loading page in iOS app - ios

Question

I'm relatively new to programming in general, but I've attempted to find the answer to this and have failed to no end.
So basically I am attempting to create an application that has a map view scene, and that works fine. I then have another scene that is for web view. So when you go to the mapview scene there is a button that takes you to the webview scene.
The webview scene, however is not loading the web page at all, although when I create the webview part of the application in a different project with no other coding involved, it works just fine.
Here is the coding I have so far:
#import <UIKit/UIKit.h>
#import <MapKit/MapKit.h>
#interface ViewController : UIViewController {
MKMapView * mapview; IBOutlet UIWebView *webview;
}
#property (nonatomic, retain) IBOutlet UIWebView*webview;
#property (nonatomic, retain) IBOutlet MKMapView *mapview;
-(IBAction)setMap:(id)sender;
-(IBAction)getlocation;
#end
--------
#implementation ViewController
#synthesize webview;
#synthesize mapview;
-(IBAction) getlocation {
mapview.showsUserLocation= YES;
}
-(IBAction)setMap:(id)sender {
switch(((UISegmentedControl *) sender).selectedSegmentIndex) {
case 0:
mapview.mapType= MKMapTypeStandard;
break;
case 1:
mapview.mapType= MKMapTypeSatellite;
break;
case 2:
mapview.mapType= MKMapTypeHybrid;
break;
default:
break;
}
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Release any cached data, images, etc that aren't in use.
}
#pragma mark - View lifecycle
- (void)viewDidLoad
{
[super viewDidLoad];
[webview loadRequest:[NSURLRequest requestWithURL: [NSURL URLWithString: #"http://www.google.com"]]];
// Do any additional setup after loading the view, typically from a nib.
}
If you could help, would be greatly appreciated. Let me know if elaboration is required.

Answer 1

First make sure viewDidLoad is executing. There are some situations where it will not be executed.
Then check if webview is nil inside viewDidLoad. Most likely this is your problem. You probably aren't setting it properly, or you're setting it after viewDidLoad executes.
Best way to debug this is just to stick a breakpoint on the loadRequest line in your code, and have a look to see if:
it gets to your breakpoint at all
that the webview variable is not 0x00000000000
PS: you should delete these lines of code:
MKMapView * mapview; IBOutlet UIWebView *webview;
-(IBAction)setMap:(id)sender;
#synthesize webview;
#synthesize mapview;
They are not needed anymore in the latest version of Xcode and wherever you learned it from is outdated.
Also, use self.webview instead of just webview. Accessing it directly is dangerous and can cause bugs.

Answer 2

Create webView programmatically:
add in viewDidLoad:
UIWebView *webView = [[UIWebView alloc] initWithFrame:self.view.bounds];
[webView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:#"http://google.co.uk"]]];
[self.view addSubview:webView];

Answer 3

please check web view delegate method
[webview setDelegate:self];