When launching an app that displays a window that happens to hide the title and has a toolbar and has an autosave name, it will keep growing on the Y axis every time you launch the app.

[…]

Expected Results: The window should be the same size as it was when the app was terminated.

Actual Results: The window has grown in the Y axis the same size as the title bar would be if it was visible.

[…]

Run GrowingWindow project to see behaviour: https://www.dropbox.com/s/4nfgrvcfiuphamq/GrowingWindow.zip?dl=0

NSWindow 에서 기본적으로 제공되는 타이틀바를 사용하고 싶지 않은 경우는

다음과 같이 상속을 받은 뒤 override 하고, 모양을 바꾸고 싶은 경우는

IB에서 원하는 모양을 만들어주면 된다.

@interface PSWindow : NSWindow 

{

// this point is used in dragging to mark the initial click location

    NSPoint initialLocation;

 }

@property (assign) NSPoint initialLocation;

@end

@implementation PSWindow

@synthesize initialLocation;

/* In Interface Builder, the class for the window is set to this subclass. Overriding the initializer provides a mechanism for controlling how objects of this class are created. */

- (id)initWithContentRect:(NSRect)contentRect

                styleMask:(NSUInteger)aStyle

                  backing:(NSBackingStoreType)bufferingType

                    defer:(BOOL)flag {

    // Using NSBorderlessWindowMask results in a window without a title bar.

    self = [super initWithContentRect:contentRect 

 styleMask:NSBorderlessWindowMask

 backing:NSBackingStoreBuffered defer:NO];

     if (self != nil) 

{

        // Start with no transparency for all drawing into the window

        [self setAlphaValue:1.0];

        // Turn off opacity so that the parts of the window that are not drawn into are transparent.

        [self setOpaque:NO];

[self setMovableByWindowBackground:YES];

    }

    return self;

}

/* Custom windows that use the NSBorderlessWindowMask can't become key by default. Override this method so that controls in this window will be enabled. */

- (BOOL)canBecomeKeyWindow 

{

    return YES;

}

/* Start tracking a potential drag operation here when the user first clicks the mouse, to establish the initial location. */

- (void)mouseDown:(NSEvent *)theEvent 

{    

    // Get the mouse location in window coordinates.

    self.initialLocation = [theEvent locationInWindow];

}

/* Once the user starts dragging the mouse, move the window with it. The window has no title bar for the user to drag (so we have to implement dragging ourselves) */

- (void)mouseDragged:(NSEvent *)theEvent 

{

    NSRect screenVisibleFrame = [[NSScreen mainScreen] visibleFrame];

    NSRect windowFrame = [self frame];

    NSPoint newOrigin = windowFrame.origin;

    // Get the mouse location in window coordinates.

    NSPoint currentLocation = [theEvent locationInWindow];

    // Update the origin with the difference between the new mouse location and the old mouse location.

    newOrigin.x += (currentLocation.x - initialLocation.x);

    newOrigin.y += (currentLocation.y - initialLocation.y);

    // Don't let window get dragged up under the menu bar

    if ((newOrigin.y + windowFrame.size.height) > (screenVisibleFrame.origin.y + screenVisibleFrame.size.height)) {

        newOrigin.y = screenVisibleFrame.origin.y + (screenVisibleFrame.size.height - windowFrame.size.height);

    }

    // Move the window to the new location

    [self setFrameOrigin:newOrigin];

}

@end