通过代码退出IOS程序

-(void) tapClick:(UITapGestureRecognizer *)tap{    [UIViewbeginAnimations:@"exitapplication"context:nil];    [UIViewsetAnimationDuration:0.5];    [UIViewsetAnimationDelegate:self];     [UIViewsetAnimationTransition:UIViewAnimationCurveEaSEOutforView:self.view.windowcache:NO];    [UIView setAnimationDidStopSelector:@selector(animationFinished:finished:context:)];    //self.view.window.bounds = CGRectMake(0, 0, 0, 0);    self.view.window.bounds = CGRectMake(0, 0, 0, 0);    [UIViewcommitAnimations];}- (void)animationFinished:(NSString *)animationID finished:(NSNumber *)finished context:(void *)context {    if ([animationID compare:@"exitApplication"] == 0) {        exit(0);    }}