constraints

I'm using Xcode 5 and autolayout in my project. I have a .xib file with a lot of subviews and constraints between them. Now I need to create an intermediate fullscreen container view and put all subviews there. So now I have view->subviews , and I want view->container view->subviews . When I do this in IB by dragging subviews into container view, they all get centred and all constraints get lost. It's going to be a little hard to restore all constraints manually. Is there a smart way to do this keeping all subviews' positions and constraints? Add your container view to the hierarchy (to get an

I am trying to create a collapsible toolbar that works like this (running in iOS 7 -- ugly colors etc. for visualization purposes): However, when I run the code in iOS 8, this is what happens: I have set up a constraint system that is based on the following: A centering view (not shown) keeps the toolbar in the screen middle. A sizing view is adjusted to collapse the toolbar. The sizing view is anchored to the right of the centering view (via a trailing constraint). A container view holds the actual content of the toolbar. It is anchored to the right of the sizing view (also via a trailing

I am trying to create a table where the values in one column can't be greater than the next column over. For example, I am creating the following table. CREATE TABLE Price ( PriceID INT PRIMARY KEY IDENTITY (1,1), OriginalPrice FLOAT NOT NULL, CurrentPrice FLOAT NOT NULL, Discount FLOAT, ShippingCost FLOAT NOT NULL, Tax FLOAT NOT NULL); And Current Price cannot be greater than OriginalPrice. So what I tried doing was CurrentPrice FLOAT CHECK (CurrentPrice <= OriginalPrice) NOT NULL, But this gives me the following error: Msg 8141, Level 16, State 0, Line 1 Column CHECK constraint for column

I have been given an exercise to solve the zebra puzzle using a constraint solver of my choice, and I tried it using the Prolog clpfd library . I am aware that there are other more idiomatic ways to solve this problem in Prolog, but this question is specifically about the clpfd package! So the specific variation of the puzzle (given that there are many of them) I'm trying to solve is this one: There are five houses The Englishman lives in the red house The Swedish own a dog The Danish likes to drink tea The green house is left to the white house The owner of the green house drinks coffee The

This is what I'm trying to do: I have 2 tables... CREATE TABLE `parent` ( `id` int(11) NOT NULL AUTO_INCREMENT, `data` text, PRIMARY KEY (`id`) ) ENGINE=InnoDB AUTO_INCREMENT=3 DEFAULT CHARSET=utf8; CREATE TABLE `child` ( `parent_id` int(11) DEFAULT NULL, `related_ids` int(11) DEFAULT NULL, KEY `parent_id` (`parent_id`), KEY `related_ids` (`related_ids`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8; And then a constraint: ALTER TABLE `parent` ADD FOREIGN KEY (`id`) REFERENCES `child` (`parent_id`); As you can see the table parent has an auto-incremented primary key "id", which is also being used as a

I am trying to programmatically set the constraint for a multiplier in swift, and when I set the value, it just gives me the error, "Cannot assign to the result of this expression"... I declared the NSLayoutConstraint with an IBOutlet, and then set the multiplier, same as I did with the constant for another, which works fine, but this one won't accept it... @IBOutlet weak var clockWidthConstraint: NSLayoutConstraint! override func updateViewConstraints() { super.updateViewConstraints() confirmTopConstraint.constant = 40.0 clockWidthConstraint.multiplier = 0.1 // Gives me the error! } Any ideas