Keystoke.m

// Title: Sending Keystrokes
// Authors: Clay McLeod
// Description: An example of how to send keystrokes to a window
// Section: Objective-C
// Subsection: System Events


#import "Keystrokes.h"

@implementation Keystrokes

Boolean holdKeyEvent(int keyCode, int minSleepSeconds, int maxSleepSeconds)
{
    CGEventRef keyDown	= CGEventCreateKeyboardEvent(kCGEventSourceStateCombinedSessionState,((CGKeyCode)(keyCode)),true);
    CGEventRef keyUp	= CGEventCreateKeyboardEvent(kCGEventSourceStateCombinedSessionState,((CGKeyCode)(keyCode)),false);
	
    if(keyUp == NULL || keyDown == NULL) return false;
	
    CGEventPost(kCGHIDEventTap,keyDown);
    
    float diff = maxSleepSeconds - minSleepSeconds;
    float someFloat = (((float) (arc4random() % ((unsigned)RAND_MAX + 1)) / RAND_MAX) * diff) + minSleepSeconds;
    NSLog(@"Holding Key Code %d for %f seconds", keyCode, (float)someFloat);
    usleep(someFloat * 1000000);
    CGEventPost(kCGHIDEventTap,keyUp);
	CFRelease(keyDown);
	CFRelease(keyUp);
	return true;
}

@end

Keystrokes.h

#import <Foundation/Foundation.h>

@interface Keystrokes : NSObject

Boolean holdKeyEvent(int keyCode, int minSleepSeconds, int maxSleepSeconds);

@end