IOS multi-size screen adaptation, ios size adaptation

IOS multi-size screen adaptation, ios size adaptation

• Point
  Point can be understood as the size unit in the eyes of iOS programmers. It is an abstract concept in the iOS operating system.

• Rendered Pixels can be understood as the size unit in the UI Designer's eye.

• Physical Pixels device screen hardware Pixel

• Physical Device name

• The following figure shows the multiples of the Rendered Pixels to the Point. Values: 1x, 2x, and 3x indicate the multiples of the Rendered Pixels to the Point.
  Before iPhone 4, it was doubled; between iPhone 6 and iPhone 4, it was doubled; after iPhone 6 plus, it was three times.

Point and Rendered Pixels are our concerns. Point is the logical size unit of the screen when developers are Coding, and Rendered Pixels is the size unit of the designer's picture.

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Note: If you do not adapt, iOS will automatically help you adapt, but it is only a simple scaling, it will cause the UIKit control to be blurred (if an adaptive image is provided, the image will not be blurred ).

• Background for iOS multi-size screen adaptation

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