iOS点击空白区域隐藏键盘

(void)viewDidLoad

{

[super viewDidLoad];

UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(viewTapped:)];

tap.cancelsTouchesInView = NO;

[self.view addGestureRecognizer:tap];

}

-(void)viewTapped:(UITapGestureRecognizer*)tap

{

[activitySearchBar resignFirstResponder];

}