kcloha.blogg.se - Swift responsive layout

Clicking on a red or faded red component will enable or disable the autoresizing mask property. Each red and faded red arrow or strut in the Autoresizing section of the inspector is clickable. Then, in the Size Inspector, configure each view with the appropriate resizing mark. First, add all the views (4 UILabel labels) in the view without any constraints. This autoresizing mask example will define the layout of all subviews in a chat message cell using autoresizing masks.

Flexible Height, meaning resizing can change the view’s height.

Flexible Width, meaning resizing can change the view’s width.

Flexible Bottom Margin, meaning resizing can change the view’s bottom margin.

Flexible Right Margin, meaning resizing can change the view’s right margin.

Flexible Left Margin, meaning resizing can change the view’s left margin.

Flexible Top Margin, meaning resizing can change the view’s top margin.

The properties available in a autoresizing mask on a view are: Now across different devices with and without rounded corners, the defined UI will display correctly: UI Using Autolayout Safe Area Example UI Using Autolayout Safe Area Example Autoresizing Mask What is a Autoresizing MaskĪutoresizing masks is a layout method using a bit mask, or an encoded set of flags, that defines how a view should respond to changes in the superview’s bounds. The result shows the powerful capabilities of Autolayout. This next step completes the Autolayout configuration and provides desired behavior.Ĭonstrain the Inbox UILabel to the Top Safe Area of the UIViewController view. So far, the views added are not yet fully constrained. UILabel Example Autolayout Constraints In A Storyboard Example Autolayout Constraints For A UILabel In A Storyboardįor the subtitle UILabel, add constraints for all edges to the superview. Importantly, do not constrain the top edge of the Inbox UILabel at this step. Also add a height constraint to the Inbox UILabel view. Add constraints for the leading and trailing edges of the Inbox UILabel to the superview (view with a blue background). Next, add two UILabel labels with some text.

UIView Autolayout Constraints In A Storyboard Importantly, do not constraint the bottom or the height of in this step. The first step is to constrain a view with a blue background to the leading, top, and trailing edges of the superview (here a UIViewController view). In the following example, the Inbox UILabel will be constrained to the top safe area of the UIViewController view even though the superview of Inbox UILabel is the view with a blue background. The secret to handling safe areas is a view constrained by autolayout does not need to be constrained only to its superview. For example, safe areas can be used to handle rounded corners and non-rounded corners on iOS screens.

Safe areas are margins maintained by the iOS system to help user interfaces account for system attributes. Responsive Landscape Orientation With Autolayout Autolayout Safe Areas ExampleĪ superpower of Autolayout is handling safe areas.

When the UI orientation is changed to landscape, Autolayout will expand both views horizontally. The UILabel and UITextfield are now properly constrained using Autolayout. Autolayout UILabel Constraints In A Storyboard The same type of constraints were added to the UITextField underneath. Here, to make a UILabel and UITextField responsive, the following constraints will be added:Īdding the constraints in a Storyboard to the UILabel shows the blue constraints attributes when the UILabel is selected. This means the view’s x, y, width, and height properties must have constraints defining how each of those frame properties should be computed. To use Autolayout on a view, that view needs a complete set of constraints. One common use case for Autolayout is supporting rotation so a UI adapts appropriately to landscape and portrait device orientations.

The user enters or leaves split view on an iPad (running iOS).The autolayout engine will recompute the appropriate layout when the superview changes size, for example: Autolayout is a user interface layout framework that uses constraints, a rule for where a UI element should be, to determine the layout of a UI.