On 8/27/14, 12:32 PM, "Kyle Sluder" <[email protected]> wrote:
>> On Aug 27, 2014, at 8:43 AM, edward taffel <[email protected]> wrote: >> >> >>> On Aug 27, 2014, at 11:30 AM, Matthew LeRoy <[email protected]> wrote: >>> This seems to work in initial testing ‹ the alert displays ‹ but I get >>>a message in the console telling me that ³NSAlert is being used from a >>>background thread, which is not safe. This is probably going to crash >>>sometimes. Š² Presumably this is because I have overridden >>>+canConcurrentlyReadDocumentsOfType: to return YES for my documents, >>>resulting in document reading happening on a background thread. >>>Changing +canConcurrentlyReadDocumentsOfType: to return NO makes the >>>warning message go away. >> >> i had this problem too: you can show the alert on the main thread via >>e.g. performSelectorOnMainThread. (as was kindly pointed out to me by, >>if i remember correctly, graham cox). > >I would not advise this. The main thread may itself be blocked due to >waiting on your document via -performSychronousFileAccesdUsingBlock:. Indeed. Further, performSelectorOnMainThread doesn¹t allow me to get the value returned from the selector ([NSAlert runModal]), which I need in order to know which choice the user name (update in place or duplicate). >Matthew, could you perhaps perform automatic conversion, mark the >document as untitled, and display a notice about automatic conversion >once the document has been asked to -showWindows? This is the strategy >I¹ve suggested implementing in our own apps in the future. This seems to work, but now I have a different problem. If the original file being opened is read-only or Locked via Finder (i.e. Immutable flag is set), then the title bar of the document window always displays the ³Locked² modifier, despite any calls to setFileURL:nil, setDraft:YES, etc. However, this seems to just be a case of desynchronization between the UI and the underlying document, because if I attempt to make any edits once the document is open the title bar immediately switches from ³Locked² to ³Edited² and I don¹t get the usual prompt, ³This document is locked, do you want to Unlock, Duplicate, or Cancel?². Any ideas on how to get the window to re-synchronize the title bar with the document state to get the "Locked" modifier to go away? The behavior I want in this scenario is for the title bar to display something like ³Untitled (copy of myFile.ext) - Edited², and to always prompt the user for a save location when the document is closed. _______________________________________________ Cocoa-dev mailing list ([email protected]) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [email protected]
