programmatically-created

问题 I know that it easy to just drag and drop a button, however a lecturer insists on creating buttons programmatically. In the Form1_Load method what code should I write to create a simple button? private void Form1_Load(object sender, System.EventArgs e) { } So that on Load the button would show? 回答1: As you said it is Winforms, you can do the following... First create a new Button object. Button newButton = new Button(); Then add it to the form inside that function using: this.Controls.Add

问题 I have a view inside a scrollview: Now I want to add the child views to that view programmatically. Thats my code to do that: Child view (works) //Adds header to the view again because it was removed in the clear() method //Header is just a label lv.addSubview(header) header.leadingAnchor.constraint(equalTo: header.superview!.leadingAnchor).isActive = true header.topAnchor.constraint(equalTo: header.superview!.topAnchor, constant: 2).isActive = true header.widthAnchor.constraint(equalTo:

问题 For an app (iOS 7 compatible) I need to have the possibility for totally different layouts in landscape and portrait mode. I see the only way in setting the constraints programmatically and change them on rotation. So I set my interface using IB and then set the constraints programmatically. I saw somewhere the approach to remove first all constraints, then create and add new constraints and then set the update flag for constraints on the parent view. I want the elements just to be full width

问题 For an app (iOS 7 compatible) I need to have the possibility for totally different layouts in landscape and portrait mode. I see the only way in setting the constraints programmatically and change them on rotation. So I set my interface using IB and then set the constraints programmatically. I saw somewhere the approach to remove first all constraints, then create and add new constraints and then set the update flag for constraints on the parent view. I want the elements just to be full width

问题 I am trying to do a forced java thread dump programmatically, just like the command jstack -F -l <PID> would do it. My best attempt: I created a subclass from sun.jvm.hotspot.tools.JStack overwriting run() with the following code analogous to sun.jvm.hotspot.tools.JStack.run() but in the last line calling start(printstream) instead of start() : StackTrace stacktrace = new StackTrace(mixedMode, concurrentLocks); try { Class<?> stacktraceTool = stacktrace.getClass().getSuperclass(); Method

问题 I have some problems creating a textView programmatically. I don't really know how to solve it. The problems are : -The margin, I don't want my TextView stuck to each other. -The text is not centered in the drawable like in the title -I want the messages of Nickname user aligned to the right and the messages of Nick aligned to the left. For this I have these two functions : private void appendSenderText(String message) { TextView msg = new TextView(ChatActivity.this); msg

问题 The user logs in and lands on viewNumOne, they fill out their name and address and get to see viewNumTwo and viewNumThree. They now logout. When they log back in I want them to go straight to viewColorBlue (this is where I am having the problem). (Login Screen) View Controller with login fields. Once logged in they go to the rootVC which is a TabBar and they land on the first tab which is viewNumOne (this works fine) (Root) TabBar: (First Tab - tabBar[0]) viewNumNavController > viewNumOne

问题 This question already has answers here : How do I create a basic UIButton programmatically? (34 answers) Closed 6 years ago . I have a UIButton which I've added in IB, however the view behind this button changes color and I need to switch the button's type between InfoDark and InfoLight . Bizarrely though, buttonType property is read only. So how can i switch between light and dark info buttons? 回答1: There's no way to change the .buttonType once it's set. You can prepare two buttons, and hide

问题 We have the web based form login authentication with j_securtiy_check working. We'd like to change it by programmatic login authentication. What is the proper way of having a servlet authenticate a user name and password passed to it? The servlet is obviously unprotected. We have been experimenting with this server.xml Realm: <Realm className="org.apache.catalina.realm.DataSourceRealm" dataSourceName="UserDatabase" userTable="app_user" userNameCol="login_name" userCredCol="password_value"

问题 Hello I am trying to create a label programmatically and add NSLayoutConstraints so that it is centered in the superview regardless of screen size and orientation etc. I have looked but just can't find an example to follow. Here is what I have: let codedLabel:UILabel = UILabel() codedLabel.frame = CGRect(x: 100, y: 100, width: 200, height: 200) codedLabel.textAlignment = .center codedLabel.text = alertText codedLabel.numberOfLines=1 codedLabel.textColor=UIColor.red codedLabel.font=UIFont