viewcontroller

问题 I have several buttons defined in a loop in viewDidLoad. They are inside a content view, which is in a scroll view. for var i:Int = 0; i < colleges.count; i++ { let collegeButton = UIButton.buttonWithType(UIButtonType.System) as UIButton collegeButton.frame = CGRectMake(0, 0, self.contentView.frame.size.width, 30) collegeButton.center = CGPoint(x: self.contentView.center.x, y: 30 * CGFloat(i) + 30) collegeButton.setTitle(sortedColleges[i], forState: UIControlState.Normal) collegeButton

问题 This question already has answers here : EXC_BAD_INSTRUCTION When Passing UICollectionView Cell Data to Different ViewController (2 answers) Closed 3 years ago . I'm a new programmer and struggling with passing data between controllers, I am aware this question is asked in these forums but the uploaded code is much more complex compared to mine and i struggle to understand it so will upload my few lines i've written. I want to allow two players to type their names into my app and then click

问题 Hi I have created a Watch app which has two pages but when I run it on apple watch and do switch between pages after few seconds one page(sometimes page1 and sometimes page2)goes black and It doesn’t show my buttons, labels nothing. But when I run it on simulator there is no problem everything is fine and also before i add second page to the app It was ok on apple watch too 回答1: I had the same issue and it was due to calling crownSequencer.focus() without a corresponding crownSequencer

问题 I want to change view controllers background color, subviews background color, & text color on condition. For example: There are 2 options (A & B ViewController) on mainViewcontroller. If a user chooses A ViewController then it will follow its color from A to X, Y, Z ViewsControllers till I push, performSegue, or present X, Y, Z View Controllers. If a user chooses B ViewController then it will follow its color from B to X, Y, Z ViewsControllers till I push, performSegue or present X, Y, Z

问题 im very new to swift/programming, so sorry if this is dumb question or sorry if my question isnt clear enough. The yellow label named "Money" has got to be the same value in every viewcontroller, so if the current value is 1000 in the first viewcontroller, its also 1000 in the second viewcontroller. Now i press that button that says "add money 200" and instead of 1000, the yellow label now has 1200. Press the "add money 200" again and i get 1400. Press "add money 400" in the secondVC and now

问题 I have looked all over for the answer to this question and can't seem to find it. How can I call a viewController method from swiftUI (e.g. on a button click)? I have a viewcontroller that looks like this: import Player class PlayerViewController: UIViewController { var player = Player() func play() { self.player.play() } } And I have a wrapper that looks like this: import SwiftUI import AVFoundation struct ProjectEditorPlayerBridge: UIViewControllerRepresentable { func makeUIViewController

问题 In my app, there is a ViewController.swift file and a popupViewController.swift file. Inside the app, when I open the popupViewController with storyboard segue as presentModally and then come back from popupViewController to ViewController with the code dismiss() , the methods viewDidLoad, viewWillAppear, viewDidAppear, ViewWillLayoutSubviews etc. nothing works, they execute just once and don't repeat when I go and return back. So, I want to execute the code every time when viewController

问题 In my app, there is a ViewController.swift file and a popupViewController.swift file. Inside the app, when I open the popupViewController with storyboard segue as presentModally and then come back from popupViewController to ViewController with the code dismiss() , the methods viewDidLoad, viewWillAppear, viewDidAppear, ViewWillLayoutSubviews etc. nothing works, they execute just once and don't repeat when I go and return back. So, I want to execute the code every time when viewController

问题 In my app, there is a ViewController.swift file and a popupViewController.swift file. Inside the app, when I open the popupViewController with storyboard segue as presentModally and then come back from popupViewController to ViewController with the code dismiss() , the methods viewDidLoad, viewWillAppear, viewDidAppear, ViewWillLayoutSubviews etc. nothing works, they execute just once and don't repeat when I go and return back. So, I want to execute the code every time when viewController

问题 What Swift code will switch the app to fullscreen? I found references with example code for IOS. I am looking for a code which works for a MacOS app. 回答1: One way is to override viewDidAppear in NSViewController : class ViewController : NSViewController { override func viewDidAppear() { let presOptions: NSApplicationPresentationOptions = ([.FullScreen,.AutoHideMenuBar]) let optionsDictionary = [NSFullScreenModeApplicationPresentationOptions : NSNumber(unsignedLong: presOptions.rawValue)] self