tableFooterView上的UIButtons没有响应事件

Question

我已成功将一些UIButtons添加到自定义tableFooterView.问题是按钮事件不会被调用.此外,相对于UIControlStateHighlighted的图像不会出现.有任何想法吗？我已经尝试了所有我能想到的,但我找不到诀窍.我在这里报告了UITableViewController的有趣部分:

- (UIView *)tableView:(UITableView *)tableView viewForFooterInSection: (NSInteger)section 
{
    CGRect footerFrame = CGRectMake(0.0, 0.0, 480, 190);
    _footerView = [[UIImageView alloc] initWithFrame: footerFrame];
    _footerView.image = [UIImage imageNamed:@"tableviewfooter.png"];
    _footerView.contentMode = UIViewContentModeTopLeft;

    UIButton *addExam = [self createButtonWithFrame: CGRectMake(10, 30, 460, 58) Target: self Selector: @selector(addNewItem:) Image: @"additem.png" ImagePressed: @"additem_pressed.png"];
    [_footerView addSubview:addExam];

    return _footerView;
}

- (CGFloat)tableView:(UITableView *)tableView heightForFooterInSection: (NSInteger) section
{
    return 190;
}


- (void) addNewItem:(id)sender
{
    // This get's never called
    NSLog(@"Pressed");
}


- (UIButton*) createButtonWithFrame: (CGRect) frame Target:(id)target Selector:(SEL)selector Image:(NSString *)image ImagePressed:(NSString *)imagePressed
{
    UIButton *button = [[UIButton alloc] initWithFrame:frame];

    UIImage *newImage = [UIImage imageNamed: image];
    [button setBackgroundImage:newImage forState:UIControlStateNormal];

    UIImage *newPressedImage = [UIImage imageNamed: imagePressed];
    [button setBackgroundImage:newPressedImage forState:UIControlStateHighlighted];

    [button addTarget:target action:selector forControlEvents:UIControlEventTouchUpInside];

    return button;
}

谢谢你的帮助!

Answer 1

我认为UIImageView其设计不适合作为其他视图的容器,尤其如此UIButtons.例如,UIImageViews,在创建时,默认情况下将其userInteractionsEnabled属性设置为false.

我只是想创建一个简单的UIView为您的页脚视图,然后同时添加UIButton和UIImageView直接给它.