ios - 如何删除重复按钮

Question

这是我的按钮创建功能。

  -(void)buttonCreate {
  //oneBtn5 Button
  oneBtn5 = [UIButton buttonWithType:UIButtonTypeCustom];
  oneBtn5.frame = CGRectMake(316, 389, 51, 21);
  oneBtn5.tag = 5;
  [oneBtn5 setTitle:@"" forState:UIControlStateNormal];
  [oneBtn5 addTarget:self action:@selector(oneButton:) forControlEvents:UIControlEventTouchDown];
  [oneBtn5 setImage:[UIImage imageNamed:@"1c.png"] forState:UIControlStateNormal];
  [self.view addSubview:oneBtn5];
}

我将使用viewonload()显示按钮，

- (void)viewDidLoad {
   [super viewDidLoad];
   [self buttonCreate];
 }

这是我的重启功能，如果我单击重启，将创建新按钮。

- (void)RestartAction {
    [self buttonCreate];
  }

我的问题是当我单击重新启动时如何删除重复按钮。有什么办法可以解决这个问题。

Answer 1

-(void)buttonCreate {
  //oneBtn5 Button
  if (oneBtn5 != null)
      [oneBtn5 removeFromSuperview];

  oneBtn5 = [UIButton buttonWithType:UIButtonTypeCustom];
  oneBtn5.frame = CGRectMake(316, 389, 51, 21);
  oneBtn5.tag = 5;
  [oneBtn5 setTitle:@"" forState:UIControlStateNormal];
  [oneBtn5 addTarget:self action:@selector(oneButton:) forControlEvents:UIControlEventTouchDown];
  [oneBtn5 setImage:[UIImage imageNamed:@"1c.png"] forState:UIControlStateNormal];
  [self.view addSubview:oneBtn5];
}