为什么不调用 applicationShouldOpenUntitledFile? [英] Why isn't applicationShouldOpenUntitledFile being called?

问题描述

我向我的应用程序委托添加了一个 applicationShouldOpenUntitledFile 方法，返回 NO 作为 Apple 的文档指定.但是，我仍然在启动时收到一个新文档.怎么了?

I added a applicationShouldOpenUntitledFile method to my application delegate, returning NO as Apple's documentation specifies. However, I'm still getting a new document on startup. What's wrong?

@implementation AppDelegate

@synthesize window;

- (void)applicationDidFinishLaunching:(NSNotification *)aNotification
{
    NSLog( @"This is being called" );
}

- (BOOL)applicationShouldOpenUntitledFile:(NSApplication *)sender
{
    NSLog( @"This never is" );
    return NO;  
}

@end

推荐答案

您正在运行 Lion.在添加 applicationShouldOpenUntitledFile 处理程序之前运行时，会创建一个新文档.现在，使用 10.7 的退出和重新打开应用程序时恢复窗口"，您的应用程序正在恢复那个无标题窗口，而不是像您想象的那样创建一个新窗口.

You're running Lion. When you ran before adding the applicationShouldOpenUntitledFile handler, a new document was created. Now, with 10.7's "Restore windows when quitting and re-opening apps", your application is restoring that untitled window, and not creating a new one as you suppose.

关闭该窗口并重新运行您的应用程序，applicationShouldOpenUntitledFile 将被调用并禁止创建新的无标题文件.

Close that window and re-run your application, and applicationShouldOpenUntitledFile will be called and will suppress the creation of a new untitled file.

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