iOS让键盘消失，取消第一响应

1.通过手势

UITapGestureRecognizer *tapGestureRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(keyboardHide)];
tapGestureRecognizer.cancelsTouchesInView = NO;
[self.view addGestureRecognizer:tapGestureRecognizer];
    
-(void)keyboardHide
{
    [self.view endEditing:YES];
}
    

2.view的touchesBegan

-(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{
　　[self.view endEditing:YES];
}

3.UIScrollView

-(void)scrollViewWillBeginDragging:(UIScrollView *)scrollView {
    [self.view endEditing:YES];
}

或者

self.tableView.keyboardDismissMode = UIScrollViewKeyboardDismissModeOnDrag;