kasceecho.blogg.se - Principle app for ios

Device Size Classesĭifferent size class combinations apply to the full-screen experience on different devices, based on screen size. For example, when the vertical size class changes from compact height to regular height - such as when the device rotates from landscape to portrait orientation - tab bars may become taller. The system defines two size classes, regular (denotes expansive space) and compact (denotes constrained space), which describe the height and width of a view.Ī view may possess any combination of size classes:Īs with other environmental variations, iOS dynamically makes layout adjustments based on the size classes of a content area. Size classes are traits that are automatically assigned to content areas based on their size. Standard system-provided views automatically adopt a safe area layout guide.įor developer guidance, see Positioning Content Relative to the Safe Area and Positioning Content Within Layout Margins.

The safe area also prevents content from underlapping the status bar, navigation bar, toolbar, and tab bar. These layout guides ensure appropriate insetting based on the device and context. When the keyboard dismisses, the top of the layout guide matches the bottom of the safe area layout guide.Īdhere to the system-defined safe areas and layout margins. You can also define custom layout guides.Ī safe area defines the area within a view that isn’t covered by a navigation bar, tab bar, toolbar, or other views a view controller might provide. The system includes predefined layout guides that make it easy to apply standard margins around content and restrict the width of text for optimal readability. Layout Guides and Safe AreasĪ layout guide defines a rectangular region that helps you position, align, and space your content on the screen. System feature availability ( 3D Touch)įor developer guidance, see NSLayoutConstraint and UITraitCollection.Internationalization features that are enabled based on locale (left-to-right/right-to-left layout direction, date/time/number formatting, font variation, text length).

Different device orientations (portrait/landscape).

Different device screen sizes, resolutions, and color gamuts (sRGB/P3).

You can set your app to dynamically adapt to a wide range of traits, including: For example, you can constrain a button so it’s always horizontally centered and positioned eight points below an image, regardless of the available screen space.Īuto Layout automatically readjusts layouts according to the constraints you specify for certain environmental variations, known as traits. Using Auto Layout, you can define rules (known as constraints) that govern the content in your app. Auto LayoutĪuto Layout is a development tool for constructing adaptive interfaces. To learn how screen resolution impacts your app’s artwork, see Image Size and Resolution. For developer guidance, see scale and nativeScale. In other words, an iPhone-only app must run on every iPhone screen size and an iPad-only app must run on every iPad screen size.ģ20x568 pt (640x1136 px touch 5th generation and laterģ20x568 pt (640x1136 px All scale factors in the table above are UIKit scale factors, which may differ from native scale factors. If your app runs on a specific device, make sure it runs on every screen size for that device. Other devices - such as iPhone SE and iPad Air - have a rectangular display. In edge-to-edge devices like iPhone X and iPad Pro, the display has rounded corners that closely match the device’s overall dimensions. IOS devices have a variety of screen sizes and people can use them in either portrait or landscape orientation.

To meet this expectation, design an adaptable interface by configuring UI elements and layouts to automatically change shape and size on different devices, during multitasking on iPad, in split view, when the screen rotates, and more. People generally want to be able to use their favorite apps on all of their devices and in any context.