tableBooterView上的UIButtons没有响应事件 [英] UIButtons on tableFooterView not responding to events

问题描述

我已经成功添加了一些UIButtons到自定义tableFooterView。问题是按钮事件不被调用。此外，相对于UIControlStateHighlighted的图像不会出现。有任何想法吗？
我试过了所有我想到的，但我找不到的伎俩。我在这里报告UITableViewController的有趣的部分：

   - （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.pngImagePressed：@ .png]; 
 [_footerView addSubview：addExam]; 
 
 return _footerView; 
} 
 
  - （CGFloat）tableView：（UITableView *）tableView heightForFooterInSection：（NSInteger）section 
 {
 return 190; 
} 
 
 
  - （void）addNewItem：（id）sender 
 {
 //这个get从不调用
 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]; 
 
返回按钮; 
} 
  

感谢您的帮助！

解决方案

我不认为 UIImageView 被设计为用作其他视图的容器，特别是 UIButtons 。例如， UIImageView s在创建时会有 userInteractionsEnabled 属性设置为 false 。

我将创建一个简单的 UIView 您的页脚视图，然后直接添加 UIButton 和 UIImageView 。

I've successfully added some UIButtons to a custom tableFooterView. The problem is that the button events does not get called. Also, the image relative to the UIControlStateHighlighted doesn't come up. Any ideas? I've tried all I could think of, but I can't find the trick. I'm reporting here the interesting part of the UITableViewController:

- (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;
}

Thanks for your help!

解决方案

I do not think UIImageView was designed to work well as a container for other views, especially UIButtons. For one, UIImageViews, when created, have their userInteractionsEnabled property set to false by default.

I would just create a simple UIView as your footer view and then add both the UIButton and the UIImageView directly to it.

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