NSWindow doesn't receive keyboard events

events, keyboard, nswindow, objective-c

Solution

You need to make the application a foreground application. This is required for the main window to receive key events.

ProcessSerialNumber psn = {0, kCurrentProcess};
OSStatus status =
  TransformProcessType(&psn, kProcessTransformToForegroundApplication);

Problem

I creating NSWindow programmatically and i can't receive any keyboard messages. Instead of this i typing in Xcode editor, but my window is in focus at this time. How i can intercept this events? Here is my code: ``` //// delegate @interface MyDelegate : NSObject @end @implementation MyDelegate @end //// view @interface MyView : NSView @end @implementation MyView - (BOOL)isOpaque { return YES;} - (BOOL)canBecomeKeyView { return YES;} - (BOOL)acceptsFirstResponder { return YES;} - (void)keyDown:(NSEvent *)event { printf("PRESS\n"); // it's ignoring } @end //// main int main(int argc, const char **argv){ [NSApplication sharedApplication]; NSWindow *window = [[NSWindow alloc] initWithContentRect:NSMakeRect( 0, 0, 100, 100 ) styleMask:NSTitledWindowMask | NSClosableWindowMask | NSMiniaturizableWindowMask backing:NSBackingStoreBuffered defer:NO]; [window setContentView: [[MyView alloc] init]]; [window setDelegate: [[MyDelegate alloc] init] ]; [window setAcceptsMouseMovedEvents:YES]; [window setLevel: NSFloatingWindowLevel]; [window makeKeyAndOrderFront: nil]; [NSApp run]; return 0; } ```

Original source