UITextField Toast (Xcode7.2 ios9.2)

[StevenGardnerGMJ]

when I use "UITextField" keyboard show, the toast was covered by "keyboard"！
My test code as follows：

---

• (void)viewDidLoad {
  [super viewDidLoad];
  // Do any additional setup after loading the view.
  self.title = @"test Toast";
  self.view.backgroundColor = [UIColor whiteColor];

  tt = [[UITextField alloc] init];
  tt.frame = CGRectMake(50, 100, 200, 40);
  tt.placeholder = @"UItoasttestWork";
  // tt.backgroundColor = [UIColor lightGrayColor];

  [self.view addSubview:tt];
  UIButton *toastBtn = [[UIButton alloc] init];
  toastBtn.frame =CGRectMake(255, 100, 60, 40);
  [toastBtn setTitle:@"Toast" forState:UIControlStateNormal];
  [toastBtn setTitleColor:[UIColor blueColor] forState:UIControlStateNormal];
  [toastBtn addTarget:self action:@selector(zButtonClick:) forControlEvents:UIControlEventTouchUpInside];
  [self.view addSubview:toastBtn];

  UITapGestureRecognizer *tapGeser = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(keyboardHidden:)];
  [self.view addGestureRecognizer:tapGeser];

}
-(void)zButtonClick:(UIButton *)btn{
[self.navigationController.view makeToast:@"This is a piece of toast"];
}

---

Any help will be appreciated!