Cocoa调整窗口以适应屏幕

Question

我有两台显示器，我希望将我的videoWindow放置并缩放到第二台显示器的大小。我想以编程方式执行此操作，因为第二个监视器分辨率可能会更改。我可以将窗口放在第二台显示器的左下角，但是我无法将其缩放到适合的位置。

此行警告：

[self.videoWindow setFrame: screenRect];

是：＆＃39; NSWindow＆＃39;可能无法回复＆＃39; setFrame＆＃39;

// inside my .h file
@property (assign) IBOutlet NSWindow *videoWindow;


// inside my .m file
- (void)windowControllerDidLoadNib:(NSWindowController *) aController
{
    [super windowControllerDidLoadNib:aController];

    NSRect videoPreviewScreenRect;
    NSArray *screenArray = [NSScreen screens];

    //Using index of 1, to get secondary monitor
    NSScreen *videoPreviewScreen = [screenArray objectAtIndex: 1];

    NSRect screenRect = [videoPreviewScreen frame];
    videoPreviewScreenRect = [videoPreviewScreen visibleFrame];

    // Get and set the screen origin based on the second monitors origin
    NSPoint videoScreenOrigin ;
    videoScreenOrigin.x = videoPreviewScreenRect.origin.x;
    videoScreenOrigin.y = videoPreviewScreenRect.origin.y;
    [self.videoWindow setFrameOrigin: videoScreenOrigin];

    // **** THIS LINE DOESN'T WORK ****
    [self.videoWindow setFrame: screenRect];

    [self.videoWindow setBackgroundColor: NSColor.blackColor];
    [self.videoWindow display];
    [self.videoWindow makeKeyAndOrderFront:nil];
}

Answer 1

我能够弄清楚问题是什么。

[self.videoWindow setFrame: screenRect];

需要更改为：

[[self videoWindow] setFrame:screenRect display:YES animate:NO];