ios - 在 iOS 中显示和删除相同的按钮

Question

我有一个UIButton。现在我在 Subview 上添加按钮:-

UIButton* button4 = [[UIButton alloc] initWithFrame:frame4];
[button4 setBackgroundImage:image3 forState:UIControlStateNormal];
[button4 setShowsTouchWhenHighlighted:YES];
[button4 addTarget:self action:@selector(Nofication:) forControlEvents:UIControlEventTouchDown];

- (void)Nofication:(id)sender
{
    share=[[UIView alloc]init];
    share.frame=CGRectMake(300, 60, 130, 100);
    [self.view addSubview:share];

    [UIView animateWithDuration:2.0
                     animations:^{
                         share.frame =CGRectMake(180, 50, 130, 100); // its final location
                     }];
    share.backgroundColor=[UIColor yellowColor];

    login=[[UIButton alloc]init];
    login.frame=CGRectMake(0, 0, 130, 50);
    [login setBackgroundImage:[UIImage imageNamed:@"login.png"] forState:UIControlStateNormal];
    [login addTarget:self action:@selector(asubmit:) forControlEvents:UIControlEventTouchDown];
    [share addSubview:login];
    login.layer.borderColor = [[UIColor whiteColor]CGColor];

    policies=[[UIButton alloc]init];
    policies.frame=CGRectMake(0, 50, 130, 50);
    [policies setBackgroundImage:[UIImage imageNamed:@"Policies.png"] forState:UIControlStateNormal];
    [policies addTarget:self action:@selector(apolicies:) forControlEvents:UIControlEventTouchDown];

    [share addSubview:policies];
  }

当我单击按钮时，它打开的 subview 工作得很好。但现在我需要如果 subview 在单击按钮时显示，则需要隐藏 subview 。如果当我单击按钮时 subview 没有显示，则需要显示 subview。所以请给我任何想法。

如何显示和隐藏相同的UIButton

提前致谢。

Answer 1

UIView 上有一个hidden 属性。 https://developer.apple.com/library/ios/documentation/uikit/reference/uiview_class/UIView/UIView.html#//apple_ref/occ/instp/UIView/hidden

if (button.isHidden) {
    button.hidden = NO;
}