Losing focus and clicking on a close button of my window?

Question

I've a method triggered when a NSTextField looses focus. This method displays a popup sheet over my current window.

Everything works great except when I've typed something in the text field and successively I close the window by clicking on the close button. In this case:

• the text field loses focus and the method is triggered and it shows the popup

but

• the window is dismissed anyway, because I've clicked the Close button, so the popup is visible only for few seconds.

Thanks

Answer 1

您应该创建一个NSWindowDelegate并实现-windowShouldClose:如果弹出窗口可见或者文本字段是先前的第一响应者（否则，您正在确定文本字段失去了焦点），则返回NO 。