uitableviewcell 中多个 ui 按钮的选择器

Question

我正在为多个 UIButtons 添加相同的选择器，它们是 UITableViewCell 的一部分，它仅适用于第一个。我错过了什么吗？

这是我的代码：

- (void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath{

    NSDictionary *d = [tableData objectAtIndex:indexPath.row];
    NSArray *answers = [d objectForKey:@"answers"];//array of { id = 35; text = "\U03c4\U03a\U03c0\U03bf\U03c4\U03b1"; }

    UILabel *startDate = (UILabel *)[cell viewWithTag:100];
    long long startDateEpoch = [[d objectForKey:@"startDate"] longLongValue];
    NSDate *sDate = [NSDate dateWithTimeIntervalSince1970:startDateEpoch/1000];
    NSDateFormatter *startDateFormatter = [[NSDateFormatter alloc] init];
    [startDateFormatter setDateFormat:@"dd/MM/yyyy"];

    startDate.text = [startDateFormatter stringFromDate:sDate];

    ((UILabel *)[cell viewWithTag:101]).text = [d objectForKey:@"subject"];

    NSArray *tags = [d objectForKey:@"tags"];
    ((UILabel *)[cell viewWithTag:102]).text = [tags componentsJoinedByString:@" "];

    NSString *imageURL = [d objectForKey:@"media"];
    UIImageView *iv = (UIImageView *)[cell viewWithTag:103];
    iv.contentMode = UIViewContentModeScaleAspectFit;
    [iv sd_setImageWithURL:[NSURL URLWithString:imageURL]
          placeholderImage:[UIImage imageNamed:@"placeholder.png"]];

    UIView *buttonsContainer = (UIView *)[cell viewWithTag:104];
    for(UIView *vv in buttonsContainer.subviews){
        [vv removeFromSuperview];
    }
    int index = 0;
    NSLog(@"buttonsContainer children: %d", buttonsContainer.subviews.count);
    for(NSDictionary *answer in answers){
        UIView *v = [[UIView alloc] initWithFrame:CGRectMake(0, index * 40 + (index+1)*5, [UIScreen mainScreen].bounds.size.width, 40)];
        v.backgroundColor = [UIColor whiteColor];
        CGRect labelFrame = v.frame;
        labelFrame.origin.y = 0;
        UILabel *l = [[UILabel alloc] initWithFrame:labelFrame];
        l.text = (NSString *)[answer objectForKey:@"text"];
        l.textAlignment = NSTextAlignmentCenter;

        UIView *bottomLine = [[UIView alloc] initWithFrame:CGRectMake(0, v.frame.size.height - 1, v.frame.size.width, 1)];
        bottomLine.backgroundColor = [UIColor colorWithRed:238.0/255.0 green:205.0/255.0 blue:103.0/255.0 alpha:1.0];

        UIButton *b = [[UIButton alloc] initWithFrame:v.frame];

        [b addTarget:self action:@selector(answered:) forControlEvents:UIControlEventTouchUpInside];

        [v addSubview:l];
        [v addSubview:bottomLine];
        [v addSubview:b];
        [buttonsContainer addSubview:v];

        index++;
    }  
}

例如，如果添加了 4 个按钮，则仅当我单击第一个按钮时才会调用选择器。当我点击其他三个时没有任何反应。

编辑：添加 answered: 代码：

- (void)answered:(UIButton *)sender
{
    NSLog(@"@answered");
}

Answer 1

好的，我找到了。许多人对 TomSwift 表示赞赏，因为他的观点让我想到了在所有视图上放置边框以调试它们的帧大小和来源。

请注意，我为我的按钮提供了与其父视图相同的框架，这是错误的，因为它们不应该具有相同的来源。按钮的原点应为 0,0，因为它们的帧大小与其父视图相同。

像我这样的菜鸟的经验教训：

当按钮不起作用时，放置边框以确保它们的框架在父视图的范围内。
不要在视图及其子视图上分配相同的框架。它将把它放在 superview 的边界之外，这在 92% 的情况下会带来不良行为。

uitableviewcell 中多个 ui 按钮的选择器

selector for multiple uibuttons in uitableviewcell

cocoa-touch

objective-c

selector

uibutton

ios