constraints

问题 I have 5 buttons, aligned in the right side of the view. I have a method, that takes the frame of the sender (the button), creates a UIImageView with that frame, removes sender from superview and add the imageView at that location, and it works EXCEPT that those constraints mess me up. It seems like when i remove one of the buttons, it changes the size of all the others, and i cant explain why. I would love to simply just remove the auto-layout feature, but i would like to make the app for

问题 I have 5 buttons, aligned in the right side of the view. I have a method, that takes the frame of the sender (the button), creates a UIImageView with that frame, removes sender from superview and add the imageView at that location, and it works EXCEPT that those constraints mess me up. It seems like when i remove one of the buttons, it changes the size of all the others, and i cant explain why. I would love to simply just remove the auto-layout feature, but i would like to make the app for

问题 I am trying to add following constraint to my DB2 table but it gives error. ALTER TABLE Table_name ADD CONSTRAINT VALID_BINDING CHECK((LOWER(REQ_BINDING) IN ('http-post','http-redirect')) AND ((LOWER(RESP_BINDING) IN ('http-post','http-redirect'))); Error stack trace DB21034E The command was processed as an SQL statement because it was not a valid Command Line Processor command. During SQL processing it returned: SQL0104N An unexpected token "END-OF-STATEMENT" was found following "', 'http

问题 I'm setting up a linear optimization using Pulp in Python. I would like to set up a conditional constrain to the problem. Like, I want to Maximize the profit of a factory. For the cost of the material, the first 1000 units cost $5 each, any more unit cost $3. For example, if the factory order 1100 units, total cost will be 1000*5+100*3. I have a list of material: material_list , a dictionary of benchmark for the materials: benchmark_dic={material_a: 1000, material_b:2000 ....} , a dictionary

问题 I am trying to center radiobuttons in UIStackView that I have created via the storyboard. However, the radiobuttons are created within the UIStackView programmatically based on data in Firebase. I am using the library offered at DLRadioButtons. UIStackView below Label, named radioStackView: Code where Radio Buttons are added based on Firebase Data: ` pollRef.observe(FIRDataEventType.value, with: {(snapshot) in self.numberOfChildren = Int(snapshot.childSnapshot(forPath: "answers")

问题 I am having the problem in setting the dynamic height for my table view cell.I have used the following code to set it, but it's not working in fact now the cell height has even increased. See this the code I have added in my project: override func viewDidLoad() { super.viewDidLoad() tableview.rowHeight = UITableViewAutomaticDimension print(tableview.rowHeight) tableview.estimatedRowHeight = 120 } This the screenshot for the constraints of the table view cell contents: Please have a look at

问题 I have a view with a UICollectionView and a UISegmentedControl . I want to change constraints so the segment controller won't overlap collection view, like in this picture: This is my code : override func viewDidLoad() { super.viewDidLoad() self.navigationItem.leftBarButtonItem = nil self.tabBarController?.tabBar.isHidden = true self.SegmentController.setTitle(SegmentAtext, forSegmentAt: 0) self.SegmentController.setTitle(SegmentBtext, forSegmentAt: 1) self.view.bringSubview(toFront:

问题 I am making a GUI, in which I am using a number of JTextfield instances to enter the input from the user. I want to specify that this particular (for example : user name) text field is mandatory to fill. How can I do this? JLabel label_2 = new JLabel("User Name"); label_2.setBounds(23, 167, 126, 21); panel_1.add(label_2); textField_2 = new JTextField(); textField_2.setColumns(10); textField_2.setBounds(178, 129, 210, 20); panel_1.add(textField_2); 回答1: you can also use JFormattedTextField

问题 ok please be gentle, I am new to WPF and LINQ - I have a strange problem here. I have a search screen and an add/edit screen. I have the add/edit screen bound to a 'CompanyContact' object and a search screen bound to a collection (CompanyContacts). I have a 3 column unique constraint (FirstName, LastName, CompanyId) on the CompanyContact db table so you can't have the same name appear twice for the same company. I should also mention that I have an "AFTER UPDATE" trigger on CompanyContact

问题 I'm trying to add constraints programmatically in my ScrollView but not working. The problem is it does not work the leading and Trailing for my label and buttons. I want to put on a scroll view first one label and below the label eg 10 dynamic buttons. The code is: var buttons : [UIButton] = [] override func viewDidLoad() { super.viewDidLoad() // Do any additional setup after loading the view, typically from a nib. //Create controller and get view //var controller = UIViewController() var