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
《地理信息系统原理、技术与方法》  97

最近几年来,地理信息系统无论是在理论上还是应用上都处在一个飞速发展的阶段。 GIS被应用于多个领域的建模和决策支持,如城市管理、区划、环境整治等等,地理信息成为信息时代重要的组成部分之一; “数字地球”概念的提出,更进一步推动了作为其技术支撑的GIS的发展。 与此同时,一些学者致力于相关的理论研究,如空间感知、空间数据误差、空间关系的形式化等等。 这恰好说明了地理信息系统作为应用技术和学科的两个方面,并且这两个方面构成了相互促进的发展过程。