QLPreviewRequestFlushContext(_:_:)
Flush the context and sets the preview response.
Declaration
func QLPreviewRequestFlushContext(_ preview: QLPreviewRequest!, _ context: CGContext!)Parameters
- preview:
The preview request object.
- context:
The graphics context to flush.
Discussion
You should call this method immediately after drawing in the graphics contexts created by QLPreviewRequestCreateContext(_:_:_:_:) and QLPreviewRequestCreatePDFContext(_:_:_:_:).
Special Considerations
Thread-safety: This function should be called in the same thread as the preview request is made in; generally, this is the same thread in which the GeneratePreviewForURL callback was invoked.
See Also
Requesting previews
QLPreviewRequestCopyContentUTI(_:)QLPreviewRequestCopyOptions(_:)QLPreviewRequestCopyURL(_:)QLPreviewRequestCreateContext(_:_:_:_:)QLPreviewRequestCreatePDFContext(_:_:_:_:)QLPreviewRequestGetDocumentObject(_:)QLPreviewRequestSetDocumentObject(_:_:_:)QLPreviewRequestGetGeneratorBundle(_:)QLPreviewRequestGetTypeID()QLPreviewRequestIsCancelled(_:)QLPreviewRequestSetDataRepresentation(_:_:_:_:)QLPreviewRequestSetURLRepresentation(_:_:_:_:)