mouse clicks and keystrokes count clicked any where - objective-c

Question

I want to implement a functionality in my mac application which will return me the mouse clicks and keystrokes count clicked any where (in my application or outside). Please guide me.
Thank You

Answer 1

NSEvent's + (id)addGlobalMonitorForEventsMatchingMask:(NSEventMask)mask handler:(void (^)(NSEvent*))block provides this functionality.
Here is a quick example:
[NSEvent addGlobalMonitorForEventsMatchingMask:NSKeyDownMask|NSLeftMouseDownMask handler:^(NSEvent *anEvent){
if(anEvent.type==NSKeyDown)
{
NSLog(#"Had key down event: %#",anEvent);
}
if(anEvent.type==NSLeftMouseDown)
{
NSLog(#"Had left mouse down event: %#",anEvent);
}
}];
You could add this somewhere during your apps initialization, for example in you application delegate's -applicationDidFinishLaunching: method.
The above does NOT register events in your application, only in other applications. If you also need events in your app, you can add a local monitor (slightly different as it returns an event):
[NSEvent addLocalMonitorForEventsMatchingMask:NSKeyDownMask|NSLeftMouseDownMask handler:^NSEvent *(NSEvent *anEvent){
if(anEvent.type==NSKeyDown)
{
NSLog(#"Had local key down event: %#",anEvent);
}
if(anEvent.type==NSLeftMouseDown)
{
NSLog(#"Had local left mouse down event: %#",anEvent);
}
return anEvent;
}];
Also note that according to the NSEvent documentation: Key-related events may only be monitored if accessibility is enabled or if your application is trusted for accessibility access (see AXIsProcessTrusted).