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• 句法
• 范例
• 规范
• 浏览器兼容性
• 另请参阅
• 相关话题

RTCIceTransport 接口的 onselectedcandidatepairchange event handler specifies a function to be called to handle the selectedcandidatepairchange event, which is fired when the ICE agent selects a new candidate pair to be used for the connection.

句法

RTCIceTransport.onselectedcandidatepairchange = candidatePairHandler;
					

值

This propoerty should be set to reference an event handler function to be called by the ICE agent when it discovers a new candidate pair that the RTCIceTransport will be using for communication with the remote peer. This event will occur at least once, and may occur more than once if the ICE agent continues to identify candidate pairs that will work better, more closely match the requested parameters, and so forth.

The event handler can determine the current state by calling the transport's getSelectedCandidatePair() method, which returns a RTCIceCandidatePair whose RTCIceCandidatePair.local and RTCIceCandidatePair.global properties specify RTCIceCandidate objects describing the local and remote candidates that are currently being used.

范例

In this example, an event handler for selectedcandidatepairchange is set up to update an on-screen display showing the protocol used by the currently selected candidate pair.

var iceTransport = pc.getSenders()[0].transport.iceTransport;
var localProto = document.getElementById("local-protocol");
var remoteProto = document.getElementById("remote-protocol");
iceTransport.onselectedcandidatepairchange = function(event) {
  var pair = iceTransport.getSelectedCandidatePair();
  localProtocol.innerText = pair.local.protocol.toUpperCase();
  remoteProtocol.innerText = pair.remote.protocol.toUpperCase();
}
					

规范

规范	状态	注释
WebRTC 1.0: Real-time Communication Between Browsers The definition of 'RTCIceTransport.onselectedcandidatepairchange' in that specification.	候选推荐	最初的规范。

浏览器兼容性

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request. 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
onselectedcandidatepairchange	Chrome No	Edge No	Firefox No	IE No	Opera No	Safari No	WebView Android No	Chrome Android No	Firefox Android No	Opera Android No	Safari iOS No	Samsung Internet Android No

图例

不支持

不支持

另请参阅

• selectedcandidatepair event and its type, 事件 .
• The other event handlers for RTCIceTransport : onstatechange and ongatheringstatechange

元数据

• 最后修改： Mar 18, 2019

相关话题

1. WebRTC API
2. RTCIceTransport
3. 特性

   1. component
   2. gatheringState
   3. getRemoteCandidates()
   4. ongatheringstatechange
   5. onselectedcandidatepairchange
   6. onstatechange
   7. role
   8. state
4. 方法

   1. getLocalCandidates()
   2. getLocalParameters()
   3. getSelectedCandidatePair()
5. Related pages for WebRTC

   1. MediaDevices.getUserMedia()
   2. Navigator.mediaDevices
   3. RTCCertificate
   4. RTCDTMFSender
   5. RTCDTMFToneChangeEvent
   6. RTCDataChannel
   7. RTCDataChannelEvent
   8. RTCDtlsTransport
   9. RTCErrorEvent
   10. RTCIceCandidate
   11. RTCPeerConnection
   12. RTCPeerConnectionIceErrorEvent
   13. RTCPeerConnectionIceEvent
   14. RTCRtpReceiver
   15. RTCRtpSender
   16. RTCRtpTransceiver
   17. RTCSctpTransport
   18. RTCSessionDescription
   19. RTCStatsEvent
   20. RTCStatsReport
   21. RTCTrackEvent