让 NSView 以编程方式出现在 Objective-C 中
我有一个 NSView 对象，它作为函数的结果返回给我。我知道视图是有效的，因为如果我这样做，我可以看到视图的内容：
NSRect rect = NSMakeRect(600,600,200,200);
NSWindow *testWindow = [[NSWindow alloc] initWithContentRect:rect styleMask:NSTexturedBackgroundWindowMask backing: NSBackingStoreBuffered defer:NO];
[[testWindow contentView] addSubview:returnedView];
[testWindow makeKeyAndOrderFront:NSApp];
在我的应用程序中，我有一个带有自定义视图的窗口（上面有一些文本），该窗口在我的代码中使用 IBOutlet 引用了一个插座。我正在尝试添加作为该出口的子视图返回的视图。
[referencedView addSubView:returnedView]
[referencedView setNeedsDisplay:YES];
引用的视图是可见的（我可以看到其中的文本），但返回的视图不会出现在顶部。我是不是忘记了什么？
这就是我的代码现在的样子：
[returnedView setFrame:NSMakeRect(0,0,200,200)];
[referencedView addSubview:returnedView];
[referencedView setNeedsDisplay:YES];
[referencedView drawRect:[referencedView bounds]];
I have a NSView object that is being returned to me as a result of a function. I know the view is valid because I can see the contents of the view if I do this:
NSRect rect = NSMakeRect(600,600,200,200);
NSWindow *testWindow = [[NSWindow alloc] initWithContentRect:rect styleMask:NSTexturedBackgroundWindowMask backing: NSBackingStoreBuffered defer:NO];
[[testWindow contentView] addSubview:returnedView];
[testWindow makeKeyAndOrderFront:NSApp];
In my application I have a window with a custom view (has some text on it) that has an outlet referenced in my code using IBOutlet. I'm trying to add the view I'm getting returned as a subview of that outlet.
[referencedView addSubView:returnedView]
[referencedView setNeedsDisplay:YES];
The referenced view is visible (I can see the text in it), but the returnedView doesn't appear on top. Am I forgetting something?
This is what my code looks like now:
[returnedView setFrame:NSMakeRect(0,0,200,200)];
[referencedView addSubview:returnedView];
[referencedView setNeedsDisplay:YES];
[referencedView drawRect:[referencedView bounds]];
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我刚刚了解到，视图只能位于一个超级视图中。我有测试代码和我想要工作的代码，因此它删除了我的视图并将其放在窗口中。
Views can only be in ONE superview is what I just learned. I had the test code and the code I wanted to work so it was removing my view and putting it in the window instead.
该自定义视图（其中包含文本）有一个自定义
drawRect实现，在其中绘制文本，对吧？在这种情况下，我的想法是您需要调用super的drawRect实现来确保子视图也被绘制。That custom view (with the text in it) has a custom
drawRectimplementation, in which the text is drawn, right? In this case, my idea is that you'd want to callsuper's implementation ofdrawRectto make sure that the subviews get drawn too.