Now, select both buttons at the same time using the Shift key and, in the Align menu, check Leading Edges. Open the Align menu with the yellow button selected and check Horizontally in Container, then click Add 1 Constraint. Now select the yellow button and enter 8 to make an 8-point constraint to the bottom of the view controller. Select Add 1 Constraint to actually create the constraint for the button. Notice the red I-bar clicking this will add or remove a constraint in that direction. Select the green button and use the Add New Constraints menu on the bottom-right and enter 40 to make a 40-point constraint to its nearest bottom neighbor. Give the upper button a green background and the lower button a yellow background. Making sure the inspectors panel is open, click the Attributes inspector and find the Background option in the View section. Now you’ll change the background colors of the buttons. Drag in a second button and position it below the first. Drag a button into the white rectangle representing your view controller in the main window area. Find the Button row – it’s easier to search for the word ‘button’ to do this. Ready? Set? Go! Dynamic ButtonsĬlick the Library button in the window bar. It’s time to get your hands dirty! The best way to get comfortable with Auto Layout is to create a user interface. New from iOS 11: Safe Area Layout Guides let you know the area of your content that is visible underneath anything that navigation or other bars might obscure. To start learning the ins and outs of Interface Builder, first create an empty iPhone application. These bars also indicate any warnings or errors by turning yellow or red, respectively. In the image below, there are three T-bars representing the button’s top, leading and trailing constraints. T-bars are Xcode’s way of visualizing constraints on a view.Use this panel to customize a view’s attributes, such as when changing the background color of a view or the text of a button. The Attributes inspector is in the middle utility pane on the right side of Xcode.This is useful when figuring out the relationship of a view. Use this panel to view the hierarchy of a view’s layout. The Document Outline is on the left side.Use this menu to vertically align a label relative to another view. The Align menu is to left of the Add New Constraints menu. Use this menu to add new constraints to UI elements like buttons and labels.
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