You should create a header file like: // Constants.h FOUNDATION_EXPORT NSString *const MyFirstConstant; FOUNDATION_EXPORT NSString *const MySecondConstant; //etc. (You can use extern instead of FOUNDATION_EXPORT if your code will not be used in mixed C/C++ environments or on other platforms.) You can include this file in each file that uses the constants or in the … Read more
Set the UIViewControllerBasedStatusBarAppearance to YES in the .plist file. In the viewDidLoad do a [self setNeedsStatusBarAppearanceUpdate]; Add the following method: – (UIStatusBarStyle)preferredStatusBarStyle { return UIStatusBarStyleLightContent; } Note: This does not work for controllers inside UINavigationController, please see Tyson’s comment below 🙂 Swift 3 – This will work controllers inside UINavigationController. Add this code inside your … Read more
Go to Targets in Xcode. Build Settings on your project’s target (your current development name). Search for Product Name under Packaging. Change its value to what you want your new project name to be.
It’s certainly possible to develop on a Windows machine, in fact, my first application was exclusively developed on the old Dell Precision I had at the time 🙂 There are three routes; Install OSx86 (aka iATKOS / Kalyway) on a second partition/disk and dual boot. Run Mac OS X Server under VMWare (Mac OS X … Read more
All you have to do is set the selection style on the UITableViewCell instance using either: Objective-C: cell.selectionStyle = UITableViewCellSelectionStyleNone; or [cell setSelectionStyle:UITableViewCellSelectionStyleNone]; Swift 2: cell.selectionStyle = UITableViewCellSelectionStyle.None Swift 3 and 4.x: cell.selectionStyle = .none Further, make sure you either don’t implement -tableView:didSelectRowAtIndexPath: in your table view delegate or explicitly exclude the cells you want … Read more
NSString *string = @”hello bla bla”; if ([string rangeOfString:@”bla”].location == NSNotFound) { NSLog(@”string does not contain bla”); } else { NSLog(@”string contains bla!”); } The key is noticing that rangeOfString: returns an NSRange struct, and the documentation says that it returns the struct {NSNotFound, 0} if the “haystack” does not contain the “needle”. And if … Read more
You may have a bad connection in your xib. I’ve had this error many times. While TechZen’s answer is absolutely right in this case, another common cause is when you change the name of a IBOutlet property in your .h/.m which you’ve already connected up to File’s Owner in the nib. From your nib: Select … Read more
Solution The compiler is warning about this for a reason. It’s very rare that this warning should simply be ignored, and it’s easy to work around. Here’s how: if (!_controller) { return; } SEL selector = NSSelectorFromString(@”someMethod”); IMP imp = [_controller methodForSelector:selector]; void (*func)(id, SEL) = (void *)imp; func(_controller, selector); Or more tersely (though hard … Read more
Compare method Either you implement a compare-method for your object: – (NSComparisonResult)compare:(Person *)otherObject { return [self.birthDate compare:otherObject.birthDate]; } NSArray *sortedArray = [drinkDetails sortedArrayUsingSelector:@selector(compare:)]; NSSortDescriptor (better) or usually even better: NSSortDescriptor *sortDescriptor; sortDescriptor = [[NSSortDescriptor alloc] initWithKey:@”birthDate” ascending:YES]; NSArray *sortedArray = [drinkDetails sortedArrayUsingDescriptors:@[sortDescriptor]]; You can easily sort by multiple keys by adding more than one to … Read more
Important: This check should always be performed asynchronously. The majority of answers below are synchronous so be careful otherwise you’ll freeze up your app. Swift Install via CocoaPods or Carthage: https://github.com/ashleymills/Reachability.swift Test reachability via closures let reachability = Reachability()! reachability.whenReachable = { reachability in if reachability.connection == .wifi { print(“Reachable via WiFi”) } else { … Read more