On Dec 3, 2009, at 12:25 AM, proger proger wrote:
int ret = NSRunAlertPanel(@"Save the work?", @"Do you want save the work?",
A modal alert is the wrong UI here. It should be a sheet on the window.
I used Interface Builder to delegate NSApplication with my delegate controller. But don't see any results.
It sounds like you just tried closing the window, not quitting the app. Those are different things.
But i'm still have problem because then NSAlert is shown(i don't see my application window, it hides)
The method name includes "AFTER last window closed". So after the user closes the window, the app terminates. The window's already gone by that point.
What you need to add is the NSWindow delegate method - windowShouldClose:. This runs when the user tries to close the window. You should move your save/discard/cancel logic to a separate method, and then call it from -windowShoudlClose, and also from - applicationShouldTerminate:. (Strictly speaking the latter should call it on every open window, but it sounds like your app only has one window.)
Note that since sheets are not modal, your -windowShouldClose should always return NO if it puts up the sheet. Then your completion handler for the sheet can close the window (unless the user canceled.)
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