問題描述
從 OSX lion 上的版本瀏覽器恢復不起作用...想法？ (Restoring from versions browser on OSX lion not working... ideas?)
I'm trying to restore a document based application from a previous version on Lion. When I select "restore version", the text view doesn't reflect the changes. However, if I close the application and reopen, the changes are there.
I'm using the file wrapper variants of NSDocument, so how can I make the text view's text storage reflect the version that's selected immediately? Am I missing something?
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參考解法
方法 1:
I had a similar problem recently (my interface didn't seem to update). Are you updating your interface in windowControllerDidLoadNib: or awakeFromNib ? When a document is reverted (revert to last saved, or selecting a version in the versions browser), windowControllerDidLoadNib: is not called again because the document is already loaded, but your file wrapper method will be.
I'm not sure if this is the best solution, but what I do is update the UI in the read wrapper method only if the document is being reverted. I do this by checking if an outlet (like your textview) is not nil.
Update:
A better solution is overriding ‑revertToContentsOfURL:ofType:error:
‑ (BOOL)revertToContentsOfURL:(NSURL *)absoluteURL ofType:(NSString *)typeName error:(NSError * __autoreleasing *)outError
{
BOOL reverted = [super revertToContentsOfURL:absoluteURL ofType:typeName error:outError];
if (reverted)
{
// re‑update interface
}
return reverted;
}