文件名称:
OHOS-ListScrollListener.md
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Openharmony v1.0 / docs / api / api-SmartVision-Devices
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# OHOS::ListScrollListener
## **Overview**
**Related Modules:**
[Graphic](Graphic.md)
**Description:**
Represents a listener that contains a callback to be invoked when the scroll state changes or when a new child view is selected at the preset position as this list scrolls. The scroll state can be \{**\} or SCROLL\_STATE\_MOVE\}. **
**Since:**
1.0
**Version:**
1.0
## **Summary**
## Public Member Functions
## **Overview**
**Related Modules:**
[Graphic](Graphic.md)
**Description:**
Represents a listener that contains a callback to be invoked when the scroll state changes or when a new child view is selected at the preset position as this list scrolls. The scroll state can be \{**\} or SCROLL\_STATE\_MOVE\}. **
**Since:**
1.0
**Version:**
1.0
## **Summary**
## Public Member Functions
A constructor used to create a ListScrollListener instance with the default state SCROLL_STATE_STOP. | |
A destructor used to delete the ListScrollListener instance. | |
OnScrollStart (int16_t index, UIView *view) | |
OnScrollEnd (int16_t index, UIView *view) | |
OnItemSelected (int16_t index, UIView *view) | Called when a new child view is selected at the preset position as this list scrolls. For details about how to set the position, see SetSelectPosition. |
GetScrollState () const | Obtains the scroll state of this list. |
operator new (size_t size) | |
operator delete (void *p) | Overrides the delete function. |
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