Question

当我点击 UIButton 时，我希望它更改其文字颜色。此外，我在每个按钮下方设置了一个视图，按钮的下边距为7.我已经完成了这一操作，以便通过更改视图的背景颜色来点击按钮的高亮效果。点击按钮没有任何结果。这里附上截图

我希望它在点击时完全像这样

- (IBAction)setMenubtn:(UIButton *)menubtn:(id)sender {
      [self.menubtn setTitleColor:[UIColor blueColor] forState:UIControlStateNormal];
      [self.contactsbtn setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
      [self.favoritesbtn setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
      [self.topView setBackgroundColor:[UIColor colorWithRed:2/255 green:115/255 blue:168/255 alpha:1]];
      [self.topview2 setBackgroundColor:[UIColor colorWithRed:226/255 green:226/255 blue:226/255 alpha:1]];
      [self.topview3 setBackgroundColor:[UIColor colorWithRed:226/255 green:226/255 blue:226/255 alpha:1]];
   }

   - (IBAction)setContactsbtn:(UIButton *)contactsbtn:(id)sender {
       [self.menubtn setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
       [self.contactsbtn setTitleColor:[UIColor blueColor] forState:UIControlStateNormal];
       [self.favoritesbtn setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
       [self.topView setBackgroundColor:[UIColor colorWithRed:226/255 green:226/255 blue:226/255 alpha:1]];
       [self.topview2 setBackgroundColor:[UIColor colorWithRed:2/255 green:115/255 blue:168/255 alpha:1]];
       [self.topview3 setBackgroundColor:[UIColor colorWithRed:226/255 green:226/255 blue:226/255 alpha:1]];
  }

  - (IBAction)setFavoritesbtn:(UIButton *)favoritesbtn:(id)sender {
       [self.menubtn setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
       [self.contactsbtn setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
       [self.favoritesbtn setTitleColor:[UIColor blueColor] forState:UIControlStateNormal];
       [self.topView setBackgroundColor:[UIColor colorWithRed:226/255 green:226/255 blue:226/255 alpha:1]];
       [self.topview2 setBackgroundColor:[UIColor colorWithRed:226/255 green:226/255 blue:226/255 alpha:1]];
       [self.topview3 setBackgroundColor:[UIColor colorWithRed:2/255 green:115/255 blue:226/255 alpha:1]];
   }

显示此输出

Answer 1

请尝试使用此代码向您展示如何在单击时更改UIButton颜色：

button = [UIButton buttonWithType:UIButtonTypeCustom];
    [button setSelected:YES];
    button.frame = CGRectMake(x, y, width, height);
    [button setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
    [button setTitleColor:[UIColor blueColor] forState:UIControlStateSelected];
    [button setTitle:@"Button Title" forState:UIControlStateNormal];
    [button addTarget:self action:@selector(buttonAction:) forControlEvents:UIControlEventTouchUpInside];
    [button setBackgroundImage:[UIImage imageNamed:@"button.png"] forState:UIControlStateNormal];
    [button setBackgroundImage:[UIImage imageNamed:@"buttonActive.png"] forState:UIControlStateHighlighted];

Answer 2

为什么要做硬编码。在Github已经制作了这种类型的自定义控件。您可以根据需要自定义布局，并且易于实现。

HMSegmentedControl

Answer 3

首先检查您的按钮是否是IBOutlets并且真正连接到故事板中的按钮。

如果按钮不是IBOutlets或连接到情节提要中的按钮，则您的代码将无法更改属性，例如self.menubtn。

确保IBOutlets仅连接一次。
确保IBAction只连接一次并连接到正确的按钮，例如touchUpInside

不改变按钮

3 个答案: