xcode NSTextField 在自定义 NSWindow 中不可编辑

NSTextField not editable in custom NSWindow

提问by PerfectGamesOnline.com

Hi everyone,

嗨，大家好，

If I create NSTextField in my controller's view then all is fine - the field is editable. Unfortunately, I have to create NSTextField in new custom NSWindow. My code bellow produces a field which looks like without focus (text selection is gray) and is not editable (no cursor and no reaction to key strokes). I can change the text selection with mouse but that is all.

如果我在我的控制器视图中创建 NSTextField 那么一切都很好 - 该字段是可编辑的。不幸的是，我必须在新的自定义 NSWindow 中创建 NSTextField。我的代码波纹管产生一个看起来没有焦点的字段（文本选择是灰色的）并且不可编辑（没有光标并且对击键没有反应）。我可以用鼠标更改文本选择，仅此而已。

Do I have to enable the NSWindow to receive key strokes?

我是否必须启用 NSWindow 才能接收击键？

Appreciate your help, --Josef

感谢您的帮助，-- 约瑟夫

      NSRect windowRect = [[self.window contentView] frame] ;
      NSWindow* uiWindow          = [[NSWindow alloc]  initWithContentRect:windowRect
                    styleMask:NSBorderlessWindowMask
                    backing:NSBackingStoreBuffered defer:YES];
      [uiWindow setBackgroundColor: [NSColor redColor/*clearColor*/]];
      [uiWindow setOpaque:NO];

      NSView* uiView = [[[NSView alloc] initWithFrame:NSMakeRect(0, 0, windowRect.size.width, windowRect.size.height)] autorelease];
      [uiView translateOriginToPoint:NSMakePoint(100, uiView.bounds.size.height/2)];
      uiView.wantsLayer = YES;

      [uiWindow setContentView:uiView];

      NSTextField *textField;
      textField = [[NSTextField alloc] initWithFrame:NSMakeRect(0, 0, 800, 80)];
      [textField setFont:[NSFont fontWithName:@"Helvetica Bold" size:60]];
      [textField setStringValue:@"My Label"];
      [textField setBezeled:YES];
      [textField setDrawsBackground:YES];
      [textField setEditable:YES];
      [textField setSelectable:YES];
      [textField setEnabled:YES];

      [uiView addSubview:textField];


// THIS DOES NOT WORK
[self.window addChildWindow:uiWindow ordered:NSWindowAbove];

// THIS WORKS
//[_graphicView addSubview:uiView];

回答by Justin Boo

You need to allow your custom window to become key window. By default, borderless windows cannot become key. In your NSWindowsubclass, add the method canBecomeKeyWindow::

您需要让您的自定义窗口成为关键窗口。默认情况下，无边框窗口不能成为关键。在您的NSWindow子类中，添加方法canBecomeKeyWindow:：

- (BOOL)canBecomeKeyWindow
{
    return YES;
}

---

---

You can check if your borderless window is key window with this:

您可以通过以下方式检查您的无边框窗口是否是关键窗口：

if([uiWindow isKeyWindow] == TRUE) {
    NSLog(@"isKeyWindow!");
}
else {
    NSLog(@"It's not KeyWindow!");
}

---

---

Furthermore, for a borderless window to accept key events, the class should implement acceptFirstResponderand return YES.

此外，对于接受关键事件的无边框窗口，该类应该实现acceptFirstResponder并返回YES。

回答by Manikandaraj Srinivasan

If you can just change your styleMask:NSBorderlessWindowMask to style:NSTitledWindowMask, the above Code will work. However i have also tried adding editable TextFields to NSBorderlessWindow, but it didn't seem to work for me either.

如果您可以将 styleMask:NSBorderlessWindowMask 更改为 style:NSTitledWindowMask，则上述代码将起作用。但是，我也尝试将可编辑的 TextFields 添加到 NSBorderlessWindow，但它似乎对我也不起作用。