通过

MediaCapture.FocusChanged 事件

  • 参考

定义

命名空间:
Windows.Media.Capture
编辑

当捕获设备更改焦点时发生。

// Register
event_token FocusChanged(TypedEventHandler<MediaCapture, MediaCaptureFocusChangedEventArgs const&> const& handler) const;

// Revoke with event_token
void FocusChanged(event_token const* cookie) const;

// Revoke with event_revoker
MediaCapture::FocusChanged_revoker FocusChanged(auto_revoke_t, TypedEventHandler<MediaCapture, MediaCaptureFocusChangedEventArgs const&> const& handler) const;
public event TypedEventHandler<MediaCapture,MediaCaptureFocusChangedEventArgs> FocusChanged;
function onFocusChanged(eventArgs) { /* Your code */ }
mediaCapture.addEventListener("focuschanged", onFocusChanged);
mediaCapture.removeEventListener("focuschanged", onFocusChanged);
- or -
mediaCapture.onfocuschanged = onFocusChanged;
Public Custom Event FocusChanged As TypedEventHandler(Of MediaCapture, MediaCaptureFocusChangedEventArgs)

事件类型

TypedEventHandler<MediaCapture,MediaCaptureFocusChangedEventArgs>

Windows 要求

应用功能
backgroundMediaRecording

适用于