The guaranteed, rock solid way to force a UIView to re-render is [myView setNeedsDisplay]. If you’re having trouble with that, you’re likely running into one of these issues: You’re calling it before you actually have the data, or your -drawRect: is over-caching something. You’re expecting the view to draw at the moment you call this … Read more
From this answer [self.navigationController.navigationBar setBackgroundImage:[UIImage new] forBarMetrics:UIBarMetricsDefault]; self.navigationController.navigationBar.shadowImage = [UIImage new]; self.navigationController.navigationBar.translucent = YES; self.navigationController.view.backgroundColor = [UIColor clearColor]; self.navigationController.navigationBar.backgroundColor = [UIColor clearColor]; Also, as suggested by Josh in the comments, to put the bar back to default: [self.navigationController.navigationBar setBackgroundImage:nil forBarMetrics:UIBarMetricsDefault];
Replying to myself: My understanding of the documentation says that using keyword block and setting the variable to nil after using it inside the block should be ok, but it still shows the warning. __block ASIHTTPRequest *request = [[ASIHTTPRequest alloc] initWithURL:… [request setCompletionBlock:^{ NSDictionary *jsonDictionary = [[CJSONDeserializer deserializer] deserialize:request.responseData error:nil]; request = nil; // …. … Read more
The answer to Using a regular expression to validate an email address explains in great detail that the grammar specified in RFC 5322 is too complicated for primitive regular expressions. I recommend a real parser approach like MKEmailAddress. As quick regular expressions solution see this modification of DHValidation: – (BOOL) validateEmail: (NSString *) candidate { … Read more
Actually, it’s very simple: [_tableView reloadSections:[NSIndexSet indexSetWithIndex:0] withRowAnimation:UITableViewRowAnimationFade]; From the documentation: Calling this method causes the table view to ask its data source for new cells for the specified sections. The table view animates the insertion of new cells in as it animates the old cells out.
How can one get the dimensions of the screen in iOS? The problem with the code that you posted is that you’re counting on the view size to match that of the screen, and as you’ve seen that’s not always the case. If you need the screen size, you should look at the object that … Read more