点击触摸－屏幕键盘回收

 UITapGestureRecognizer *tapGestureRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(keyboardHide:)];

    tapGestureRecognizer.cancelsTouchesInView = NO;

    [self.view addGestureRecognizer:tapGestureRecognizer];

-(void)keyboardHide:(UITapGestureRecognizer*)tap{

    [self.textV resignFirstResponder];

    

}