Create a timer which will fire after ti seconds and, if f is YES, every ti seconds thereafter. On firing, invocation will be performed.
This timer will automatically be added to the current run loop and will fire in the default run loop mode.

Create a timer which will fire after ti seconds and, if f is YES, every ti seconds thereafter. On firing, the target object will be sent a message specified by selector and with the timer as its argument.
This timer will automatically be added to the current run loop and will fire in the default run loop mode.

Create a timer which will fire after ti seconds and, if f is YES, every ti seconds thereafter. On firing, invocation will be performed.
NB. To make the timer operate, you must add it to a run loop.

Create a timer which will fire after ti seconds and, if f is YES, every ti seconds thereafter. On firing, the target object will be sent a message specified by selector and with the timer as its argument.
NB. To make the timer operate, you must add it to a run loop.

Fires the timer... either performs an invocation or sends a message to a target object, depending on how the timer was set up.
If the timer is not set to repeat, it is automatically invalidated.
Exceptions raised during firing of the timer are caught and logged.

Returns the date/time at which the timer is next due to fire.

Initialise the receive, a newly allocated NSTimer object.
The fd argument specifies an initial fire date... if it is not supplied (a nil object) then the ti argument is used to create a start date relative to the current time.
The ti argument specifies the time (in seconds) between the firing. If it is less than or equal to 0.0 then a small interval is chosen automatically.
The f argument specifies whether the timer will fire repeatedly or just once.
If the selector argument is zero, then then object is an invocation to be used when the timer fires. otherwise, the object is sent the message specified by the selector and with the timer as an argument.
The fd, object and info arguments will be retained until the timer is invalidated.

Marks the timer as invalid, causing its target/invocation and user info objects to be released.
Invalidated timers are automatically removed from the run loop when it detects them.

Checks to see if the timer has been invalidated.

Change the fire date for the receiver.
NB. You should NOT use this method for a timer which has been added to a run loop. The only time when it is safe to modify the fire date of a timer in a run loop is for a repeating timer when the timer is actually in the process of firing.

Returns the interval between firings, or zero if the timer does not repeat.

Returns the user info which was set for the timer when it was created, or nil if none was set or the timer is invalid.