QLThumbnailRequestFlushContext(_:_:)
Flush the graphics context and sets the thumbnail response.
Declaration
func QLThumbnailRequestFlushContext(_ thumbnail: QLThumbnailRequest!, _ context: CGContext!)Parameters
- context:
The graphics context to flush.
Discussion
You should call this method after drawing in the graphics context created by QLThumbnailRequestCreateContext(_:_:_:_:).
Special Considerations
Thread-safety: This function should be called in the same thread as the thumbnail request is made in; generally, this is the same thread in which the GenerateThumbnailForURL callback was invoked.
See Also
Handling thumbnail requests
QLThumbnailRequestCopyContentUTI(_:)QLThumbnailRequestCopyOptions(_:)QLThumbnailRequestCopyURL(_:)QLThumbnailRequestCreateContext(_:_:_:_:)QLThumbnailRequestGetDocumentObject(_:)QLThumbnailRequestGetGeneratorBundle(_:)QLThumbnailRequestGetMaximumSize(_:)QLThumbnailRequestGetTypeID()QLThumbnailRequestIsCancelled(_:)QLThumbnailRequestSetDocumentObject(_:_:_:)QLThumbnailRequestSetImage(_:_:_:)QLThumbnailRequestSetImageAtURL(_:_:_:)QLThumbnailRequestSetImageWithData(_:_:_:)QLThumbnailRequestSetThumbnailWithDataRepresentation(_:_:_:_:_:)QLThumbnailRequestSetThumbnailWithURLRepresentation(_:_:_:_:_:)