Can't change background for UIWebView in iOS

You can set the opaque property of the webview to NO and then set background color of the view beneath.

[webView setOpaque:NO];

Give this a try. It will fade the UIWebView in once it has finished loading and you won't see the flash.

@interface Web_ViewViewController : UIViewController <UIWebViewDelegate> {UIWebView *web;BOOL firstLoad;}@property (nonatomic, retain) IBOutlet UIWebView *web;@end...(void)viewDidLoad {    [super viewDidLoad];    firstLoad = YES;    web.delegate = self;    web.alpha = 0.0;    NSURL *clUrl = [NSURL URLWithString:@"http://www.apple.com"];    NSURLRequest *req = [NSURLRequest requestWithURL:clUrl];    [web loadRequest:req];}- (void)webViewDidFinishLoad:(UIWebView *)webView {if (firstLoad) {    firstLoad = NO;    [UIView beginAnimations:@"web" context:nil];    web.alpha = 1.0;    [UIView commitAnimations];    }}

The animation block in webViewDidFinishLoad will fade the view in once it's loaded, or if you prefer to have it pop on then just remove the UIView calls.

None of the answers here worked for me, they all involved still some sort of flash. I found a working answer here: http://www.iphonedevsdk.com/forum/iphone-sdk-development/4918-uiwebview-render-speeds-white-background.html (I had to adjust the delay to .25 to avoid the flashing). Remember to check the UIWebView's "hidden" flag in InterfaceBuilder.

- (void)webViewDidFinishLoad:(UIWebView *)webView {    [self performSelector:@selector(showAboutWebView) withObject:nil afterDelay:.25];          }- (void)showAboutWebView {    self.infoWebView.hidden = NO;}