Camera

createCameraContext

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The API usage is as follows: CameraContext wx.createCameraContext()

• Functional description: Create the camera context CameraContext object
• Return value: CameraContext

CameraContext

• Functional description: CameraContext instance, which can be wx.createCameraContext Get. cameraContext and the only one in the page camera Component binding, operation corresponding camera Component

.onCameraFrame

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The API usage is as follows: CameraFrameListener CameraContext.onCameraFrame(onCameraFrameCallback callback)

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To use this interface, you must camera Specify frame-size in component properties

• Functional description: Get the Camera real-time frame data.

• Return value: function callback。

• object.success callback function parameters: Object res。

  Properties	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, one-dimensional array, each four items represent the rgba of a pixel

• Return value: CameraFrameListener

• Sample code:

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

.setZoom

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The API usage is as follows: CameraContext.setZoom(Object object)

• Functional description: Set the zoom level.

• Parameters and descriptions: Object object

  Properties	Type	Default value	Required	Description
  zoom	number	-	Yes	Zoom level, range [1, maxZoom]. zoom can be a decimal, accurate to one decimal place. maxZoom can be obtained from the bindinitdone return value
  success	Function	-	No	Callback function for successful interface call
  fail	Function	-	No	Callback function for failed interface call
  complete	Function	-	No	Callback function for interface call completion (executed regardless of success or failure)

• object.success callback function parameters: Object res。

  Properties	Type	Description
  zoom	number	The actual zoom level set. Due to system limitations, some models may not be able to be set to the specified value, and the closest settable value will be used instead

.startRecord

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The API usage is as follows: CameraContext.startRecord(Object object)

• Functional description: Start recording.

• Parameters and descriptions: Object object

  Properties	Type	Default value	Required	Description
  timeoutCallback	function	-	No	The recording will end when the time exceeds 30 seconds or the page onHide is called. This callback will also be triggered when the recording is abnormally exited.
  success	Function	-	No	Callback function for successful interface call
  fail	Function	-	No	Callback function for failed interface call
  complete	Function	-	No	Callback function for interface call completion (executed regardless of success or failure)

• object.timeoutCallback callback function parameters: Object res。

  Properties	Type	Description
  tempThumbPath	string	The temporary path of the cover image file
  tempVideoPath	string	The temporary path of the video file

.stopRecord

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The API usage is as follows: CameraContext.stopRecord(Object object)

• Functional description: End recording.

• Parameters and descriptions: Object object

  Properties	Type	Default value	Required	Description
  success	Function	-	No	Callback function for successful interface call
  fail	Function	-	No	Callback function for failed interface call
  complete	Function	-	No	Callback function for interface call completion (executed regardless of success or failure)

• object.success callback function parameters: Object res。

  Properties	Type	Description
  tempThumbPath	string	The temporary path of the cover image file
  tempVideoPath	string	The temporary path of the video file

.takePhoto

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The API usage is as follows: CameraContext.takePhoto(Object object)

• Functional description: Take a photo.

• Parameters and descriptions: Object object

  Properties	Type	Default value	Required	Description
  quality	string	normal	No	Image quality
  success	Function	-	No	Callback function for successful interface call
  fail	Function	-	No	Callback function for failed interface call
  complete	Function	-	No	Callback function for interface call completion (executed regardless of success or failure)

• Legal values

  Value	Description
  high	High quality
  normal	Normal quality
  low	Low quality

• object.success callback function parameters: Object res。

  Properties	Type	Description
  tempImagePath	string	The temporary path (local path) of the photo file, jpg image format for Android and png for iOS

CameraFrameListener

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• The listener returned by CameraContext.onCameraFrame()
• For related documents, see camera。

.start

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The API usage is as follows: CameraFrameListener.start(Object object)

• Functional description: Start listening to frame data.

• Parameters and descriptions: Object object

  Properties	Type	Default value	Required	Description
  success	Function	-	No	Callback function for successful interface call
  fail	Function	-	No	Callback function for failed interface call
  complete	Function	-	No	Callback function for interface call completion (executed regardless of success or failure)

.stop

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The API usage is as follows: CameraFrameListener.stop(Object object)

• Functional description: Stop listening to frame data.

• Parameters and descriptions: Object object

  Properties	Type	Default value	Required	Description
  success	Function	-	No	Callback function for successful interface call
  fail	Function	-	No	Callback function for failed interface call
  complete	Function	-	No	Callback function for interface call completion (executed regardless of success or failure)