constraints

问题 I have a cell that contains a container with 10 subviews (two of them are simply bounds and the others are labels). The scheme looks like this. Dynamic labels may contain huge text so the cells should conform the appropriate size to fit the content. The question is how to set up all the constraints manually... I've tried a dozen of times to do it myself but seems I'm not that good at this. The table view supports auto dimension for row height and uses custom estimated height. In Storyboard it

问题 MY WORK SO FAR: So I have a Tab bar that looks like this: When I click on "Canteen" I want to be directed to a Page View Controller where I can swipe between different pages but stay on the same tab. I have this somewhat working: I have the Storyboard setup like this: As you can see that segue above is coming from the Tab Bar Controller. The third view (Can Page Item Controller, ID: "CanItemController) is used for all pages in the page view. The second view above (Page View Controller, ID:

问题 I am trying to create a chat application where in I have made a custom UITableViewCell using only code. So it is like a bubble with Name, message and time labels inside the bubble in the same order. The name label should be half of the total bubble's width and the bubble's width is determined by the width of the message whose maximum width is 220.0f after which it will go to next line. The problem that I am facing is: I am trying to change the name label's width constraint's constant

问题 I have two tables: CREATE TABLE Event_details( event_no INTEGER AUTOINCREMENT NOT NULL, no_players INTEGER NOT NULL, game_type VARCHAR(20) NOT NULL, payout_positions INTEGER NOT NULL, PRIMARY KEY(event_no) CONSTRAINT check_game_type CHECK(game_type IN ('NLH','NLO','PLO','PLH','STUD','HORSE') CONSTRAINT check_no_players CHECK (no_players > 1) CONSTRAINT check_payouts CHECK (payout_positions > 0 AND payout_positions < no_players)); CREATE TABLE Venue( venue_no INTEGER AUTOINCREMENT NOT NULL,

问题 I want to add programatically created UIViews into scrollView with auto layout constraints. Like vertical linear layout in Android. (In objective c not swift) I have scrollview inside view controller in storyboard. So basically i want to create and add several views in vertical layout with no spaces into that scrollview. And i want to set container size of the scroll view dynamically according to the view heights. Each view has label inside and each view needs to set its height dynamically

问题 I am working on some code in R to optimize my fantasy football lineup but I am having some difficulty with one constraint. I basically have a list of players, their position, expected points, and cost. Roster must include: 1 QB 2 RB 2 WR 1 TE 1 FLEX (either a RB, WR, or TE) Total cost under $200 My issue is that my code wants to pick the FLEX position as player it already selected as a WR, RB or TE. Here is the code I am using, I have a table that I imported with columns for player, position,

问题 I have a UTableView: tableView = UITableView() tableView.dataSource = self tableView.delegate = self tableView.register(UINib(nibName: "TableViewCell", bundle: nil), forCellReuseIdentifier: "Cell") tableView.rowHeight = 60.0 tableView.tableFooterView = UIView() view.addSubview(tableView) tableView.translatesAutoresizingMaskIntoConstraints = false tableViewHeightAnchor = tableView.heightAnchor.constraint(equalToConstant: 0) let constraints = [tableView.topAnchor.constraint(equalTo: view

问题 The issue is like this: There has space between searchbar and navbar : And in the Debug in Hierarchy : The table View The wrapper View, we can see the space (20 pix) And in the storyboard , I set the constraint to the tableView , attention: the navigationBar is draged by myself, the native is hide by me. My Code import UIKit import SVProgressHUD class StoreListViewController: UIViewController, UISearchBarDelegate, UITableViewDelegate,UITableViewDataSource, UISearchResultsUpdating { @IBOutlet

问题 As I find it difficult sometimes to get what I expect from layouting with storyboards, I am playing around a bit with programmatic constraints... I am aware that getting started here will be more difficult – but hope the „end-game“ with this approach is more efficient. ;-) When I use the following code on a simple viewController & mainView & centerView combo everything is as expected i.e. mainView fills entire screen available and centerView fills only the center part of mainView:

问题 I have a vector of a few hundred numerical entries (like this: Xo = [x1, y1, x2, y2,..., xN, yN]) where N is an arbitrary number. I need to pass this vector to the scipy fmin_cobyla optimizer with simple simple constraints on each of the entries: 1. All of the x's (ie. x1, x2, ..., xN) are such that -1 I've tried to use lambda functions to specify the constraints like this b0 = lambda Xo: 1 - Xo[n] b1 = lambda Xo: Xo[n] + 1 however I am completely unsure of how to pass in the proper index n.