9. Ios

  • 9.17. Use of image view

    An image view is used to display an image of a single image or animation sequence. Important attribute Image Highl...
    2025-10-25 13:32:31 UTC
  • 9.18. Use of scrolling views

    If the content exceeds the size of the screen, the scrolling view is used to show the hidden part. It can contain all othe...
    2025-10-25 13:32:31 UTC
  • 9.19. Use of table view

    The IOS table view consists of cells (generally reusable) that display views scrolling vertically. In iOS, the table view ...
    2025-10-25 13:32:30 UTC
  • 9.21. The use of IOS text views

    The text view is used to display text with multiple lines of scrolling. 9.21.1. Important attribute ¶ DataDetecto...
    2025-10-25 13:32:33 UTC
  • 9.22. The use of IOS View switching

    View switching is achieved through a series of animation effects, including folding switching, explosion switching, card swi...
    2025-10-25 13:32:32 UTC
  • 9.23. The use of selector

    A selector is a scrollable view that selects values in a list item. 9.23.1. Important attribute ¶ Delegate Da...
    2025-10-25 13:32:30 UTC
  • 9.24. The use of IOS switch

    The switch is used to switch between the on and off states. Important attribute OnImage OffImage On 9.24...
    2025-10-25 13:32:32 UTC
  • 9.25. The use of IOS slider

    The slider is used to select a value from a range of values. Important attribute Continuous MaximumValue Minim...
    2025-10-25 13:32:33 UTC
  • 9.26. The use of IOS warning dialog box

    The warning dialog box is used to provide important information to the user. You can proceed to further use the applicatio...
    2025-10-25 13:32:32 UTC
  • 9.27. The use of IOS icon

    The IOS icon is used for application-related operations. Different icons in IOS AppIcon Application icon for App S...
    2025-10-25 13:32:33 UTC
  • 9.28. IOS accelerometer (accelerometer)

    9.28.1. Brief introduction ¶ The accelerometer detects the change in the position of the device according to the x, y...
    2025-10-25 13:32:32 UTC
  • 9.29. IOS general purpose application

    9.29.1. Brief introduction ¶ General-purpose applications are designed for iPhone and iPad in a single binary file. T...
    2025-10-25 13:32:31 UTC
  • 9.30. IOS camera management

    9.30.1. Brief introduction of camera ¶ The camera is one of the common features of mobile devices, we can use the cam...
    2025-10-25 13:32:32 UTC
  • 9.31. IOS positioning operation

    9.31.1. Brief introduction ¶ Through CoreLocation positioning in IOS, the current location of the user can be obtaine...
    2025-10-25 13:32:30 UTC
  • 9.32. IOS SQLite database

    9.32.1. Brief introduction ¶ Use Sqlite to process data in IOS. If you already know SQL, you can easily master the op...
    2025-10-25 13:32:34 UTC
  • 9.33. IOS sends email

    9.33.1. Brief introduction ¶ We can use the email application in the IOS device to send e-mail. 9.33.2. Instanc...
    2025-10-25 13:32:33 UTC

Principles, Technologies, and Methods of Geographic Information Systems

 102

In recent years, Geographic Information Systems (GIS) have undergone rapid development in both theoretical and practical dimensions. GIS has been widely applied for modeling and decision-making support across various fields such as urban management, regional planning, and environmental remediation, establishing geographic information as a vital component of the information era. The introduction of the “Digital Earth” concept has further accelerated the advancement of GIS, which serves as its technical foundation. Concurrently, scholars have been dedicated to theoretical research in areas like spatial cognition, spatial data uncertainty, and the formalization of spatial relationships. This reflects the dual nature of GIS as both an applied technology and an academic discipline, with the two aspects forming a mutually reinforcing cycle of progress.