uiview

问题 I'm trying to add a view to a UINavigationController with its top aligned with the navigation bar's bottom. I tried using constraints by adding the following to my UINavigationController subclass: override func viewDidAppear(_ animated: Bool) { self.label = UILabel() self.label?.translatesAutoresizingMaskIntoConstraints = false self.label?.backgroundColor = UIColor.red self.label?.text = "label text" self.view.addSubview(self.label!) let horConstraint = NSLayoutConstraint(item: label!,

问题 I'm trying to add a view to a UINavigationController with its top aligned with the navigation bar's bottom. I tried using constraints by adding the following to my UINavigationController subclass: override func viewDidAppear(_ animated: Bool) { self.label = UILabel() self.label?.translatesAutoresizingMaskIntoConstraints = false self.label?.backgroundColor = UIColor.red self.label?.text = "label text" self.view.addSubview(self.label!) let horConstraint = NSLayoutConstraint(item: label!,

问题 In our app, we set the keyboardAppearance to dark. This produces a black keyboard, as expected. However, if the keyboard is showing, and we press the home button, and then go back into the app, the keyboard turns white, as shown. Any ideas why? 回答1: It may have todo with the fact that the keyboard is a global object. There's only ever one keyboard in memory at any given time. Also, the OS will automatically change the keyboard color based on the background. Therefore, your setting is probably

问题 I have three custom circle UIViews which are created. When a user clicks on one of these I would like to change the background Color of the view to be Grey. When the view is originally created, it is a randomColor. I would like this color to stay around for if the view was selected again. I.e. change from color to grey and then grey to color when selected again. What is the best way to change the view background or add an overlay in someway to my custom UIView to make it grey? 回答1: I think

问题 I have three custom circle UIViews which are created. When a user clicks on one of these I would like to change the background Color of the view to be Grey. When the view is originally created, it is a randomColor. I would like this color to stay around for if the view was selected again. I.e. change from color to grey and then grey to color when selected again. What is the best way to change the view background or add an overlay in someway to my custom UIView to make it grey? 回答1: I think

问题 I am trying to animate a UIView through non linear path(i'm not trying to draw the path itself) like this : The initial position of the view is determinated using a trailing and bottom constraint ( viewBottomConstraint.constant == 100 & viewTrailingConstraint.constant == 300 ) I am using UIView.animatedWithDuration like this : viewTrailingConstraint.constant = 20 viewBottomConstraint.constant = 450 UIView.animateWithDuration(1.5,animation:{ self.view.layoutIfNeeded() },completition:nil) But

问题 I have two structs ContentView.swift struct ContentView: View { var body: some View { NavigationView{ ZStack { Color(red: 0.09, green: 0.63, blue: 0.52) .edgesIgnoringSafeArea(.all) VStack { Image("flower_logo") .resizable() .aspectRatio(contentMode: .fit) .frame(width: 150.0, height: 150.0) .clipShape(Circle()) Text("ScanFlower") .font(Font.custom("Pacifico-Regular", size: 40)) .bold() .foregroundColor(.white) Text("DETECT FLOWER SPECIES") .foregroundColor(.white) .font(.system(size: 15))

问题 I am trying to implement one button- one click to display the first message, the second click would change to second message, the third click would change to the third message. I looked up to one possible solution is to use UITapGestureRecognizer - single tap and double tap, which means I can trigger the button (single tap to display the first message and double tap to display the second message). However, if I have more than two lines and I just want to display them by clicking each one

问题 I am trying to implement one button- one click to display the first message, the second click would change to second message, the third click would change to the third message. I looked up to one possible solution is to use UITapGestureRecognizer - single tap and double tap, which means I can trigger the button (single tap to display the first message and double tap to display the second message). However, if I have more than two lines and I just want to display them by clicking each one

问题 I am trying to implement one button- one click to display the first message, the second click would change to second message, the third click would change to the third message. I looked up to one possible solution is to use UITapGestureRecognizer - single tap and double tap, which means I can trigger the button (single tap to display the first message and double tap to display the second message). However, if I have more than two lines and I just want to display them by clicking each one