Merge pull request #23390 from just-gull:bugfix.21401.fix-macos-crash-when-keypress-does-nothing

check keydown event characters length on macos
2 years ago · 20eee64426
parent 85a04185d3 6ffe686ba8
commit 20eee64426
1 changed files with 1 additions and 1 deletions
--- a/modules/highgui/src/window_cocoa.mm
+++ b/modules/highgui/src/window_cocoa.mm
@ -618,7 +618,7 @@ CV_IMPL int cvWaitKey (int maxWait)
         inMode:NSDefaultRunLoopMode
         dequeue:YES];
-        if([event type] == NSKeyDown) {
+        if([event type] == NSKeyDown && [[event characters] length]) {
            returnCode = [[event characters] characterAtIndex:0];
            break;
        }