UITableView deselectRowAtIndexPath调用UITableviewCell setSelected?

时间:2013-03-29 18:41:39

标签: ios uitableview

我有自定义单元格,在选中时执行短动画,并且在取消选择时应该动画回到它们的第一个状态。

这是我setSelected

- (void)setSelected:(BOOL)selected animated:(BOOL)animated {

if (selected && animated) {
    NSLog(@"animate");
    [UIView animateWithDuration:0.3
                          delay:0.0
                        options:UIViewAnimationOptionBeginFromCurrentState
                     animations:^{
                         self.chevronImage.transform = CGAffineTransformMakeRotation(M_PI);
                         [self.chevronImage setCenter:CGPointMake(self.chevronImage.center.x, self.chevronImage.center.y - 1)];
                     }
                     completion:nil];
}

if (!selected && animated) {
    NSLog(@"unanimate");
    [UIView animateWithDuration:0.3
                          delay:0.0
                        options:UIViewAnimationOptionBeginFromCurrentState
                     animations:^{
                         self.chevronImage.transform = CGAffineTransformMakeRotation(0);
                         [self.chevronImage setCenter:CGPointMake(self.chevronImage.center.x, self.chevronImage.center.y + 1)];
                     }
                     completion:nil];
}

[super setSelected:selected animated:animated];
}

以下是调用它的代码:

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {

if (![selectedIndex isEqual:indexPath]) {
    NSLog(@"select %i", indexPath.row);
    [tableView selectRowAtIndexPath:indexPath animated:YES scrollPosition:UITableViewScrollPositionNone];
}
if (selectedIndex != nil) {
    NSLog(@"deselect %i", selectedIndex.row);
    [tableView deselectRowAtIndexPath:selectedIndex animated:YES];
}
if (controlRowIndex != nil && [indexPath isEqual:controlRowIndex]) {
    return;
}

indexPath = [self modelIndexPathforIndexPath:indexPath];
NSIndexPath *indexPathToDelete = controlRowIndex;

if ([indexPath isEqual:selectedIndex]){
    selectedIndex = nil;
    controlRowIndex = nil;
} else {
    selectedIndex = indexPath;
    controlRowIndex = [NSIndexPath indexPathForRow:indexPath.row + 1
                                         inSection:indexPath.section];
}

[self.tableView beginUpdates];
if (indexPathToDelete){
    [self.tableView deleteRowsAtIndexPaths:@[indexPathToDelete]
                          withRowAnimation:UITableViewRowAnimationFade];
}
if (controlRowIndex){
    [self.tableView insertRowsAtIndexPaths:@[controlRowIndex]
                          withRowAnimation:UITableViewRowAnimationFade];
}
[self.tableView endUpdates];
}

如果我选择一行然后再次点击它以取消选择它,这可以正常工作。但是,如果我点击第0行然后点击第1行,我会选择两行,第0行永远不会被取消选择。

我无法弄清楚有什么不同,我每次都传递完全相同的值,但是如果它当前也被选中,我只能将它设置为动画。我已经验证它正在发送正确的indexPath,所以我有点不知所措。

编辑:添加了完整的方法代码

1 个答案:

答案 0 :(得分:0)

我原本希望你在selectedIndex中设置变量didSelectRowAtIndexPath:,但我看不到你在哪里设置它。因此,看起来您正在与错误的索引路径进行比较。

在概念上,我会先取消选择。

BOOL tappedSelectedCell = [selectedIndex isEqual:indexPath];
if (selectedIndex != nil) {
   // deselect selectedIndex
   selectedIndex = nil;
}

if (selectedIndex == nil && !tappedSelectedCell) {
   // select indexPath
   selectedIndex = indexPath;
}

或更简单,但稍长

if (selectedIndex == nil) {
   // select indexPath
   selectedIndex = indexPath;
   return;
}

if ([selectedIndex isEqual:indexPath]) {
   // deselect indexPath
   selectedIndex = nil;
}
else {
    // deselect selectedIndex
    // select indexPath
    selectedIndex = indexPath;
}