viewdidload

问题 I have an app written in Swift with an NSTimer declared in the viewDidLoad ; the timer runs a function once every second. Here's the code inside my viewDidLoad() : let checkStateTimer = NSTimer.scheduledTimerWithTimeInterval(1.0, target: self, selector: "callCheckState:", userInfo: nil, repeats: true) Currently, I have another function which is called which I want to pause the timer. It should, I believe, use: checkStateTimer.invalidate() However, because the timer is in the viewDidLoad and

问题 I have an app written in Swift with an NSTimer declared in the viewDidLoad ; the timer runs a function once every second. Here's the code inside my viewDidLoad() : let checkStateTimer = NSTimer.scheduledTimerWithTimeInterval(1.0, target: self, selector: "callCheckState:", userInfo: nil, repeats: true) Currently, I have another function which is called which I want to pause the timer. It should, I believe, use: checkStateTimer.invalidate() However, because the timer is in the viewDidLoad and

来源： https://stackoverflow.com/questions/62646213/viewdidload-not-being-called-in-swift-subclasses-inherited-from-objc-superclass

问题 I've been trying to understand for hours when I should use the viewDidload: and when I should use initWithNibName: to set up the properties of my viewController. For instance, I'm using a TableViewController and I'm setting all its properties (such as the backgroundColor, the separateColor, the toolbar items) in initWithNibName. It is the right way to do ? If somebody could enlighten me. Thanks 回答1: You should set up your properties in the viewDidLoad . This method is called by the system

问题 My problem is different users will have access to different products. Say User 1 has access to 3 whereas User 2 has access to all 4. Can I have something upon Login where if User 1 logs in, it will tell the MainView to only show 3 cells? Something like ViewDidLoad in the MainView to read what the Login Page echo-ed? Can that be done? Thanks. 回答1: Store a global variable in appdelegate like numberOfCells . Assign value to it by the condition of your login. Once your MainView is about to

问题 I'm having problems getting my iPad app to detect its interfaceOrientation in the first UIViewController I initialize (in code). In fact, if I trace for application.statusBarOrientation, that too returns 1 (UIInterfaceOrientationPortrait) even if I launched in landscape. If I trace self.interfaceOrientation in my first UIViewController, it remains 1 until it gets to viewWillDisappear... Which is unfortunately too late! Here's some code (even though there's not much to see): In my appDelegate

问题 I have an understanding problem... I created two similar views (same origin and same size) and section view, While i created those views - one in viewDidLoad and the other in viewDidAppear - when i put similar starting point in the origin x and y of each view that refer to section i get those views in different position. Can someone explain me what is the reason that those views isn't in the same position? import UIKit class ViewController: UIViewController { @IBOutlet var sec: UIView!

问题 I have a VC that I'm initializing, and in it is a View . In the View is a UITableView , UIButton , and UIImage . I was messing with button attributes when all of a sudden, wham: Assertion failure in -[UITableView _createPreparedCellForGlobalRow:withIndexPath:] After further digging, it was because my code: UINib *animCellNib = [UINib nibWithNibName:@"IoUISEAnimationDetailListingCell" bundle:nil]; [animationDetailsTableView registerNib:animCellNib forCellReuseIdentifier:@

问题 I have an application that is working as it was supposed to. However, I put one breakpoint at the first line of my rootViewController's viewDidLoad method and another breakpoint in the first line of my delegate's didFinishLaunchingWithOptions, Surprisingly for me, the application entered in the viewDidLoad method, then went to the didFinishLaunchingWithOptions, and then executed one more time the viewDidLoad method. What is going on? I think that that behavior is totally wrong. Thank you in

问题 I've been following this tutorial to have a Slide-Out Menu. I've added a TableViewController which will display a list of articles. For some reason the viewDidLoad is not firing. In this tutorial a SideViewController controls which controller will be displayed, in case of having a segue with identifier "showPhoto", it will load a specific image. // Set the photo if it navigates to the PhotoView if ([segue.identifier isEqualToString:@"showPhoto"]) { PhotoViewController *photoController =