# wx.canvasToTempFilePath(Object object, Object this)

with Promise style call: Supported

Mini Program plugin: Support, need to Mini Program base library version no less than 1.9.6

Generates a specified size picture by exporting the contents of the specified area of the current canvas. in draw() Callback call this method to ensure that the picture export success.

# parameter

# Object object

attribute	type	Default values	Required	Introductions	Minimum version
x	number	0	no	The upper-left abscissa of the specified canvas area	1.2.0
and	number	0	no	The upper-left ordinate of the specified canvas area	1.2.0
width	number	Canvas width - x	no	Width of the specified canvas area	1.2.0
height	number	Canvas height - y	no	Height of the specified canvas area	1.2.0
destWidth	number	width*Screen pixel density	no	Width of output picture	1.2.0
destHeight	number	height*Screen pixel density	no	Height of output picture	1.2.0
canvasId	string		no	Canvas identity, passed in canvas Component canvas-id
canvas	Object		no	Canvas identity, passed in canvas Component instance （canvas type="2d" This property is used when the.
fileType	string	png	no	Type of destination file	1.7.0
quality	number		no	The quality of the picture is currently only jpg Effective. The range is (0, 1]When not within the scope of 1.0 Deal with.	1.7.0
success	function		no	Interface calls the successful callback function
fail	function		no	Interface calls failed callback functions
complete	function		no	Interface calls the end of the callback function (call success or failure will be executed)

object.fileType Legal value

value	Introductions	Minimum version
jpg	jpg picture
png	png picture

# object.success callback

# parameter

# Object res

attribute	type	Introductions
tempFilePath	string	Temporary path to build file (Local path)

# Object this

Under a custom component, the this of the current component instance to manipulate within the component canvas assembly

# sample code


wx.canvasToTempFilePath({
  x: 100,
  and: 200,
  width: 50,
  height: 50,
  destWidth: 100,
  destHeight: 100,
  canvasId: 'myCanvas',
  success(res) {
    console.log(res.tempFilePath)
  }
})