NSTimer:timerWithTimeInterval:target:selector:userInfo:repeats:

+(NSTimer *) timerWithTimeInterval:(NSTimeInterval)seconds
　　　target:(id)target
　　　selector:(SEL)aSelector
　　　userInfo:(id)userInfo
　　　repeats:(BOOL)repeats

## example

#import "MyObject.h"
@implementation MyObject

NSTimer *timer;

- (IBAction)myAction:(id)sender
{
    timer = [NSTimer timerWithTimeInterval:1
                             target:self
                             selector:@selector(timerControl)
                             userInfo:nil
                             repeats:YES];

    [[NSRunLoop currentRunLoop] addTimer:timer forMode:NSDefaultRunLoopMode];
}
- (IBAction)fire:(id)sender
{

}
- (IBAction)stop:(id)sender
{

}

-(void) timerControl{
    NSLog(@"...");
}
@end