ios - 自定义单元格内的 UITableViewCell 按钮动画，我得到错误的单元格索引路径以显示动画

Question

我在 UITableViewCell 中的按钮动画有问题。

当我按下我的按钮单元格时，我希望它显示动画，但是 UITableViewCell 中按钮的可见和最后一个对象只有它可以显示动画。

我希望我按下 UITableView 单元格内的按钮，indexPath 为 0，而 indexPath 0 的按钮可以显示动画.

@interface ListViewController ()  <UITableViewDataSource,UITableViewDelegate>
{
    NSInteger pressedCounts;
}

@property (nonatomic)ListTableViewCell *cell;
@end

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{

    self.cell = [tableView dequeueReusableCellWithIdentifier:@"listCell" forIndexPath:indexPath];

    //Btn setting    
    [self.cell.listLoveBtn addTarget:self action:@selector(loveBtnPressed:forEvent:) forControlEvents:UIControlEventTouchUpInside];

    return self.cell;
}

- (IBAction)loveBtnPressed:(id)sender forEvent:(UIEvent *)event
{

    //set button pressed indexpath
    UITouch *touch = event.allTouches.anyObject;
    CGPoint touchPoint = [touch locationInView:self.listTableView];
    NSIndexPath *indexPath = [self.listTableView indexPathForRowAtPoint:touchPoint];

    NSLog(@"btn pressed indexpath is %ld",(long)indexPath.row);

    //set button pressed animated
    [self.cell.listLoveBtn setImage:[UIImage imageNamed:pressedCounts%2==0?@"listUnlikeBtn":@"listLikeBtn"] forState:UIControlStateNormal];

    CAKeyframeAnimation *btnAnimation = [CAKeyframeAnimation animationWithKeyPath:@"transform.scale"];
    btnAnimation.values = @[@(0.1),@(1.0),@(1.5)];
    btnAnimation.keyTimes = @[@(0.0),@(0.5),@(0.8),@(1.0)];
    btnAnimation.calculationMode = kCAAnimationLinear;

    pressedCounts++;

    [self.cell.listLoveBtn.layer addAnimation:btnAnimation forKey:@"Animation"];
}

谢谢!

Answer 1

您的代码中有很多问题。

首先删除引用单元格的属性。它没有按照您的想法行事。您也不需要点击按钮的事件。

这需要您按如下方式更新您的 cellForRowAtIndexPath 方法:

-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
    ListTableViewCell *cell = (ListTableViewCell *)[tableView dequeueReusableCellWithIdentifier:@"listCell" forIndexPath:indexPath];

    //Btn setting    
    [cell.listLoveBtn addTarget:self action:@selector(loveBtnPressed:) forControlEvents:UIControlEventTouchUpInside];

    return cell;
}

对于按钮处理程序，您不需要该事件。只需获取按钮的框架并将其转换为表格 View 的坐标即可。使用它从表格中获取单元格。请注意，按钮处理程序不是 IBAction。

还要避免在一行中嵌套大量代码。分割线。当出现问题时，它更易于阅读和调试。

- (void)loveBtnPressed:(UIButton *)button {
    CGPoint buttonPoint = CGPointMake(5, 5); // A point within the button
    CGPoint tablePoint = [button convertPoint:buttonPoint toView:self.listTableView]; // Convert point to table view coordinates
    NSIndexPath *indexPath = [self.listTableView indexPathForRowAtPoint:tablePoint]; // Get the index path

    NSLog(@"btn pressed indexpath is %ld",(long)indexPath.row);

    //set button pressed animated
    ListTableViewCell *cell = [self.listTableView cellForRowAtIndexPath:indexPath]; // Get the cell for the index path
    UIImage *image = [UIImage imageNamed:pressedCounts % 2 == 0 ? @"listUnlikeBtn" : @"listLikeBtn"];
    [cell.listLoveBtn setImage:image forState:UIControlStateNormal];

    CAKeyframeAnimation *btnAnimation = [CAKeyframeAnimation animationWithKeyPath:@"transform.scale"];
    btnAnimation.values = @[@(0.1),@(1.0),@(1.5)];
    btnAnimation.keyTimes = @[@(0.0),@(0.5),@(0.8),@(1.0)];
    btnAnimation.calculationMode = kCAAnimationLinear;

    pressedCounts++;

    [cell.listLoveBtn.layer addAnimation:btnAnimation forKey:@"Animation"];
}