NSWindow 通过Dock栏reopen

在appdelegate添加如下代码

- (BOOL)applicationShouldHandleReopen:(NSApplication *)theApplication hasVisibleWindows:(BOOL)flag

{

    if (flag) {

        return NO;

    }

    else

    {

        [self.windowmakeKeyAndOrderFront:self];// Window that you want open while click on dock app icon

        return YES;

    }

}