我的 UIView 有一个 UIButton 作为它的子视图之一，但不响应 objective-c 中的事件

Question

这是我的代码。在试图解决这个问题一两个小时后，它开始显得拥挤起来。我试着将用户交互设置为"是"，我试着只使用一个按钮，而不使其成为另一个视图的子视图。

现在我有filterBar>filterBarContainer>filterButton

- (void)viewDidAppear:(BOOL)animated
{
    [super viewDidAppear:animated];
    self.navigationController.navigationBar.userInteractionEnabled = YES;
    self.view.userInteractionEnabled = YES;
    // Create filter bar with specified dimensions
    UIView *filterBar = [[UIView alloc] initWithFrame:CGRectMake(0, 42, self.view.frame.size.width, self.navigationController.navigationBar.frame.size.height)];
    [filterBar setUserInteractionEnabled:YES];
    // Make it a subview of navigation controller
    [[[self navigationController] navigationBar] addSubview:filterBar];
    [filterBar setBackgroundColor:[[UIColor whiteColor] colorWithAlphaComponent:0.9f]];
    [filterBar setTag:1];
    // Reusable vars
    // CGFloat filterBarX = filterBar.frame.origin.x;
    //CGFloat filterBarY = filterBar.frame.origin.y;
    CGFloat filterBarHeight = filterBar.frame.size.height;
    CGFloat filterBarWidth = filterBar.frame.size.width;
    // Create centre filter button with specified dimensions
    UIView *filterButtonContainer = [[UIView alloc] initWithFrame:CGRectMake(0, 2, filterBarWidth / 2 - 30 , filterBarHeight - 10)];
        [filterButtonContainer setUserInteractionEnabled:YES];
    // Make it a subview of filter bar
    [filterBar addSubview:filterButtonContainer];
    [filterButtonContainer setBackgroundColor:[UIColor redColor]];
    // Centre the button
    [filterButtonContainer setCenter:[filterBar convertPoint:filterBar.center fromView:filterBar.superview]];
     // Add button to filter button
    UIButton *filterButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
    [filterButton setUserInteractionEnabled: YES];
    [filterButton setFrame:CGRectMake(0, 0,40 , 20)];
    [filterButton setTitle:@"test" forState:UIControlStateNormal];
    [filterButtonContainer addSubview:filterButton];
    [filterButton setBackgroundColor:[UIColor yellowColor]];
   // self.filterButton = filterButton;
    [filterButton addTarget:self action:@selector(filterButtonTapped:) forControlEvents:UIControlEventTouchUpInside];
    NSLog(@"dd");
    filterButtonContainer.layer.borderColor = [UIColor blackColor].CGColor;
    filterButtonContainer.layer.borderWidth = 1;

这是我试图触发的方法

- (void)filterButtonTapped:(UIButton *)sender
{
    NSLog(@"filter button tapped");
    UIActionSheet *filterOptions = [[UIActionSheet alloc] initWithTitle:@"Filter Garments"
                                                              delegate:self
                                                     cancelButtonTitle:@"Cancel"
                                                destructiveButtonTitle:nil
                                                      otherButtonTitles:@"Recommended", @"What's New", @"Price - High to Low", @"Price - Low to High", nil];
    [filterOptions showInView:self.collectionView];
}

Answer 1

很可能您的父视图（按钮的超视图）中有一个width或height，它将过滤器按钮放置在其区域之外。按钮仍然显示（如果您没有定义视图应该剪切子视图），但视图区域外的元素将不会得到任何触摸事件。检查超视图的宽度和高度。

Answer 2

您将filterBar添加为navigationBar的子视图，但将其在navigationBar中的y原点设置为42。然后将filterButtonContainer在filterBar中的y原点设置为2。假设navigationBar的高度为44，则大多数filterBar以及整个filterButtonContainer和filterButton都不在其navigationBar超视图中，因此该按钮将不可选择。

编辑：为了在保持定位不变的情况下使其可选择，我建议在self.view中添加过滤条。例如，change:

[[[self navigationController] navigationBar] addSubview:filterBar];

至

[self.view addSubview:filterBar];