In Cocoa, a delegate is an object that another object defers to on questions of behavior and informs about changes in its state. For instance, a UITableViewDelegate is responsible for answering questions about how the UITableView should behave when selections are made or rows are reordered. It is the object that the UITableView asks when … Read more
You have several issues here. It’s important to read the documentation related to the app lifecycle which states what is called under iOS 13 and what is called under iOS 12. You may also want to see my Single View App template that supports iOS 12 and 13. Looking at your code, here is a … Read more
Well, I would not recommend you using anything, related to network operations on watch itself. First of all because Apple does not recommend to do it for obvious reasons. The only network thing that is performed on the watch directly is loading images. I have been struggling with network operations and watch for like a … Read more
You may be having issues with the if (applicationIsActive) condition. Put a breakpoint on -didReceiveRemoteNotification and see whether it executes in different scenarios and see if it goes within the if-condition. (unrelated to a certain extent but worth checking) this question: didReceiveRemoteNotification when in background Note: -didReceiveRemoteNotification will not execute if your app was (initially) … Read more
The other solution is correct in that it will get you a reference to the application’s delegate, but this will not allow you to access any methods or variables added by your subclass of UIApplication, like your managed object context. To resolve this, simply downcast to “AppDelegate” or what ever your UIApplication subclass happens to … Read more
To choose a previous approach to the one supported by SwiftUI, from a project created in Xcode 11, you can follow these steps.
You can access the delegate like this: MainClass *appDelegate = (MainClass *)[[UIApplication sharedApplication] delegate]; Replace MainClass with the name of your application class. Then, provided you have a property for the other view controller, you can call something like: [appDelegate.viewController someMethod];
This error can occur when you rename files outside of XCode. To solve it you can just remove the files from your project (Right Click – Delete and “Remove Reference”). Then after you can re-import the files in your project and everything will be OK.
NOTE: The below solution no longer works on iOS 13+ devices – it will return garbage data. Please use following code instead: + (NSString *)hexadecimalStringFromData:(NSData *)data { NSUInteger dataLength = data.length; if (dataLength == 0) { return nil; } const unsigned char *dataBuffer = (const unsigned char *)data.bytes; NSMutableString *hexString = [NSMutableString stringWithCapacity:(dataLength * 2)]; … Read more
You have to set ViewController StoryBoardId property as below image. open viewController using coding as below in swift func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool { let mainStoryboardIpad : UIStoryboard = UIStoryboard(name: “Main”, bundle: nil) let initialViewControlleripad : UIViewController = mainStoryboardIpad.instantiateViewControllerWithIdentifier(“Circles”) as UIViewController self.window = UIWindow(frame: UIScreen.main.bounds) self.window?.rootViewController = initialViewControlleripad self.window?.makeKeyAndVisible() return true … Read more