objective c - NSEvent addGlobalMonitorForEventsMatchingMask:NSLeftMouseDownMask call two times -


i'm adding event nsleftmousedownmask function:

mouselefclick = [nsevent addglobalmonitorforeventsmatchingmask:nsleftmousedownmask handler:^(nsevent *leftmousedown) {       nslog(@"!!");

}];

when press first time it's call right when press second time function it's call 2 times , other clicks it's going right except second one. please me! thx!


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