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Last updated: 2024-11-21 18:48:11

onMemoryWarning

This API is used via wx.onMemoryWarning(function listener).
Feature Description: Monitors low memory warning events. When iOS/Android issues a memory warning to the mini program process, these events are triggered. The triggering of such events does not imply that the mini program process has been cleared. In most cases, it is merely a warning. Developers can recycle some unnecessary resources to avoid further exacerbating memory tension after receiving the notification.
Parameter and Description: function listener, the monitoring function for low memory warning events.
Attribute
Type
Description
level
number
Memory warning level, only available on Android, corresponds to system macro definition.
Valid Values for Level
Valid Values
Description
5
TRIM_MEMORY_RUNNING_MODERATE
10
TRIM_MEMORY_RUNNING_LOW
15
TRIM_MEMORY_RUNNING_CRITICAL
Sample Code
wx.onMemoryWarning(function () {
  console.log('onMemoryWarningReceive')
})

offMemoryWarning

This API is used via wx.offMemoryWarning(function listener).
Feature Description: Removes the listener function for low memory warning events.
Parameters and Description: function listener, the listener function passed in by onMemoryWarning. If this parameter is not passed in, all listener functions will be removed.
Sample Code
const listener = function (res) { console.log(res) }

wx.onMemoryWarning(listener)
wx.offMemoryWarning(listener) // The same function object as the listener must be passed in.

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