如何检测我的窗口正在使用红色窗口按钮关闭？ [英] How to detect that my window is being closed using the red window button?

问题描述

我有一个对话窗口，可以通过自定义取消按钮或使用系统红色窗口按钮取消。当对话框取消时，我需要执行一些简单的逻辑。如何检测用户是否按下了红色按钮？

I have a dialog window that can be cancelled through a custom Cancel button or using the system red window button. I need to perform some simple logic when the dialog is cancelled. How do I detect that the user has pressed the red button?

我知道我可以使用 -windowWillClose： code> delegate回调。但是当我在对话成功后以编程方式关闭窗口时，也会调用此回调。我也知道我可以简单地设置一个 BOOL 标志，但有更好的解决方案吗？

I know I can detect the window being closed using the -windowWillClose: delegate callback. But this callback is also called when I close the window programmatically after the dialog succeeds. I also know I could simply set up a BOOL flag, but is there a better solution? It would be best if I could detect the red button activation.

推荐答案

定义关闭按钮：

NSButton *closeButton = [self standardWindowButton:NSWindowCloseButton];

将关闭按钮连接到自定义选择器：

Connect close button to custom selector:

[closeButton setTarget:self.delegate];
[closeButton setAction:@selector(closeThisWindow)]; 

手动运行特定代码并关闭窗口。

Run specific code and close window manually.

-(void)closeThisWindow {

    //
    // The NSWindowCloseButton has been clicked.
    // Code to be run before the window closes.
    //

    [self close]; 
}

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