在此页

• 句法
• 范例
• 规范
• 浏览器兼容性
• 另请参阅
• 相关话题

安全上下文
此特征只可用于 安全上下文 (HTTPS)，在某些或所有 支持浏览器 .

XRInputSourceArray 方法 forEach() executes the specified callback once for each input source in the array, starting at index 0 and progressing until the end of the list.

句法

xrInputSourceArray.forEach(callback, thisArg);
					

参数

callback

A function to execute once for each entry in the array xrInputSourceArray . The callback accepts up to three parameters:

currentValue

A XRInputSource object which is the value of the item from within the xrInputSourceArray which is currently being processed.

currentIndex 可选

An integer value providing the index into the array at which the element given by currentValue is located. If you don't need to know the index number, you can omit this.

sourceList 可选

XRInputSourceArray object which is being processed. If you don't need this information, you may omit this.

thisArg 可选

The value to be used for this while executing the callback. Note that if you use arrow function notation ( => ) to provide the callback, you can omit thisArg , since all arrow functions lexically bind this .

返回值

Undefined.

范例

This example snippet gets the list of inputs for a session and tries to handle each type of input device it supports using.

let inputSources = xrSession.inputSources;
inputSources.forEach((input) => {
  if (input.gamepad) {
    checkGamepad(input.gamepad);
  } else {
    if (input.targetRayMode === "tracked-pointer" &&
        input.handedness === player.handedness) {
      /* Handle main hand controller */
      handleMainHandInput(input);
    } else {
      /* Handle other inputs */
    }
  }
});
					

For each input in the llist, the callback dispatches gamepad inputs to a checkGamepad() with the input's Gamepad object, taken from its gamepad property, as an input

For other devices, we look for tracked-pointer devices in the player's main hand, dispatching those to a handleMainHandInput() 方法。

规范

规范	状态	注释
WebXR 设备 API The definition of 'XRInputSourceArray' in that specification. 1	工作草案	XRInputSourceArray interface

[1] 见 Iterator-like methods in Information contained in a WebIDL file for information on how an iterable declaration in an interface definition causes entries() , forEach() , keys() ，和 values() methods to be exposed from objects that implement the interface.

浏览器兼容性

更新 GitHub 上的兼容性数据

	桌面						移动
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
forEach()	Chrome 79	Edge 79	Firefox No	IE No	Opera No	Safari No	WebView Android No	Chrome Android 79	Firefox Android No	Opera Android No	Safari iOS No	Samsung Internet Android 11.2

图例

完整支持

完整支持

不支持

不支持

另请参阅

• Inputs and input sources
• 数组 方法 forEach( )
• XRInputSource

元数据

• 最后修改： Apr 7, 2020

相关话题

1. WebXR 设备 API
2. XRInputSourceArray
3. 特性

   1. length
4. 方法

   1. entries()
   2. forEach()
   3. keys()
   4. values()
5. Related pages for WebXR Device API

   1. Navigator.xr
   2. WebGLRenderingContext.makeXRCompatible()
   3. XR
   4. XRBoundedReferenceSpace
   5. XRFrame
   6. XRInputSource
   7. XRInputSourceEvent
   8. XRInputSourcesChangeEvent
   9. XRPose
   10. XRReferenceSpace
   11. XRReferenceSpaceEvent
   12. XRRenderState
   13. XRRigidTransform
   14. XRSession
   15. XRSessionEvent
   16. XRSpace
   17. XRView
   18. XRViewerPose
   19. XRViewport
   20. XRWebGLLayer