CameraContext

CameraContext instance, available at wx.createCameraContext.

CameraContext is bound to the unique camera component within the page, which operates the corresponding camera component.

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Method:

CameraFrameListener CameraContext.onCameraFrame(function callback)

Base library 2.7.0 starts to support, and low versions need to be compatible.

Get Camera real-time frame data

Parameters

function callback

Callback function

Parameters

Object res

Property	Type	Description
width	number	The width of the image data rectangle
height	number	The height of the image data rectangle
data	ArrayBuffer	Image pixel data, a one-dimensional array, each of which represents a pixel rgba

Returns a value

CameraFrameListener

Note: Using this interface requires specifying frame-size in the camera component properties at the same time.

The sample code

const context = wx.createCameraContext()
const listener = context.onCameraFrame((frame) => {
  console.log(frame.data instanceof ArrayBuffer, frame.width, frame.height)
})
listener.start()

CameraContext.setZoom(Object object)

Base library 2.10.0 starts to support, and low versions need to be compatible.

Set the zoom level

Parameters

Object object

Property	Type	The default	Required	Description
zoom	number		Is	Zoom level, range 1, maxZoom. Z oom is desirable for a small number, accurate to the next place in the count. MaxZoom is available in the bindinitdone return value.
success	function		Whether	The interface calls a successful callback function
fail	function		Whether	The interface calls the failed callback function
complete	function		Whether	Callback function at end of interface call (call succeeds, fails are executed)

object.success callback function

Parameters

Object res

Property	Type	Description
zoom	number	The zoom level that is actually set. Due to system limitations, some models may not be able to set a specified value and will use the nearest setable value between.

CameraContext.startRecord(Object object)

Start recording

Parameters

Object object

Property	Type	The default	Required	Description
timeoutCallback	function		Whether	The recording ends when more than 30s or the page onHide
success	function		Whether	The interface calls a successful callback function
fail	function		Whether	The interface calls the failed callback function
complete	function		Whether	Callback function at end of interface call (call succeeds, fails are executed)

object.timeoutCallback callback function

Parameters

Object res

Property	Type	Description
tempThumbPath	string	Temporary path to cover picture file (local path)
tempVideoPath	string	Temporary path for video files (local path)

CameraContext.stopRecord(Object object)

End the recording

Parameters

Object object

Property	Type	The default	Required	Description
compressed	boolean	false	Whether	Start video compression, which works the same chooseVideo
success	function		Whether	The interface calls a successful callback function
fail	function		Whether	The interface calls the failed callback function
complete	function		Whether	Callback function at end of interface call (call succeeds, fails are executed)

object.success callback function

Parameters

Object res

Property	Type	Description
tempThumbPath	string	Temporary path to cover picture file (local path)
tempVideoPath	string	Temporary path for video files (local path)

CameraContext.takePhoto(Object object)

Take a photo

Parameters

Object object

Property	Type	The default	Required	Description
quality	string	normal	Whether	Image quality
success	function		Whether	The interface calls a successful callback function
fail	function		Whether	The interface calls the failed callback function
complete	function		Whether	Callback function at end of interface call (call succeeds, fails are executed)

The legal value of object.quality

Value	Description	The lowest version
high	Quality
normal	Ordinary quality
low	Low quality

object.success callback function

Parameters

Object res

Property	Type	Description
tempImagePath	string	Photo file temporary path (local path), Android is jpg picture format, ios is png