NSTextField在自定义NSWindow中不可编辑 [英] NSTextField not editable in custom NSWindow

问题描述

大家好，

如果我在控制器的视图中创建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。我的代码下面会产生一个看起来没有焦点的字段（文本选择为灰色）并且不可编辑（没有光标，并且对按键没有反应）。我可以用鼠标更改文本选择，仅此而已。

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.

我必须启用NSWindow来接收按键吗？

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

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];

推荐答案

您需要允许自定义窗口成为关键窗口。默认情况下，无边界窗口不能成为关键。在您的 NSWindow 子类中，添加方法 canBecomeKeyWindow：：

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

- (BOOL)canBecomeKeyWindow
{
    return YES;
}

---

---

您可以使用以下命令检查无边界窗口是否为关键窗口：

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

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

---

---

此外，要使无边界窗口接受键事件，该类应实现 acceptFirstResponder 并返回 YES 。

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

这篇关于NSTextField在自定义NSWindow中不可编辑的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！