Methods frequently used by nsobject objects in objective-C

/*
Used to determine whether the object is the type provided by the parameter (the parameter can be the class of the parent class)
Parameter example: [nsobject class];
  */
- (Bool) iskindofclass :( class) Aclass;

/* 
Used to determine whether the object is the type provided by the parameter (the parameter cannot be the class of the parent class)
Parameter example: [nsobject class];
 */
-(Bool) ismemberofclass :( class) Aclass;

/*
Determines whether an object is a subclass of a specified class.
 */
+(Bool) issubclassofclass :( class) Aclass;

/*
Used to determine whether an object complies with the protocol provided by Parameters
Parameter example: @ protocol (uiapplicationdelegate)
 */
-(Bool) conformstoprotocol :( Protocol*) Aprotocol;

/*
Method used to determine whether an object has Parameters
Parameter example: @ selector (test) or @ selector (testbyid :)
 */
-(Bool) respondstoselector :( SEL) aselector;

/*
Used to determine whether the caller's instance object has the provided Method
 */
+(Bool) instancesrespondtoselector :( SEL) aselector;

/*
The method provided by the delayed call parameter. The required parameters are passed in with withobject (similar to the setTimeout Function in actionscript3.0)
Delay unit: seconds
 */
-(Void) Performselector :( SEL) aselector withobject :(ID) Anargument afterdelay :( nstimeinterval) delay;