iphone - Pass CGPoint in Notification of iOS -

i want send cgpoint maincontroller class. using notification send cgpoint dont know how extract cgpoint notification @ receiver. 0.00 on log output.

here code.

at sender:

 nsvalue *pointasobject =[nsvalue valuewithcgpoint:cgpointmake(touchdetectingview.lasttouchposition.x, touchdetectingview.lasttouchposition.y)];   [[nsnotificationcenter defaultcenter] postnotificationname: @"swap" object:pointasobject]; 

at receiver header file:

- (void)incomingnotification:(nsnotification *)notification; 

at receiver m file

[super viewdidload]; [[nsnotificationcenter defaultcenter] addobserver:self selector:@selector(incomingnotification:) name:@"swap" object:nil];  - (void)incomingnotification:(nsnotification *)notification {      nsvalue *pointasobject = [[notification userinfo] valueforkey:@"swap"];     nslog (@"successfully received test notification %f",pointasobject.cgpointvalue.y); } 

but 0.00 output ..

- (void)incomingnotification:(nsnotification *)notification {      nsvalue *pointasobject = [notification object];     nslog (@"successfully received test notification %f",pointasobject.cgpointvalue.y); }