tableHeaderView的高度似乎为0 [英] Height of tableHeaderView seems to be 0

问题描述

我尝试覆盖第二个tableHeaderView.但是似乎在heightForHeaderInSection方法中它的高度似乎为0.无法解释，我是否必须将其放在iVar中，因为在viewForHeaderInSection中我可以设置视图而没有任何问题.

I tried to override the second tableHeaderView. But it seems that the height of it in the method heightForHeaderInSection seems to be 0. Can't explain it, do I have to put it in a iVar because in the viewForHeaderInSection I can set the view without any problems.

 - (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section {
if(section == 0)
    return @"Adding a new list";
else
    return @"Other lists";

}

- (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section {

if(section == 0) {
    return tableView.tableHeaderView;
} else {
    UIView *view = [[[UIView alloc] initWithFrame:CGRectMake(10, 10, 100, 50)] autorelease];
    view.backgroundColor = [UIColor redColor];

    return view;
}

}

- (CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section {
if(section == 0)
    return tableView.tableHeaderView.frame.size.height;
else
    return 30;
}

推荐答案

我认为您混淆了表标题和每个节的标题，它们是不同的.没有第二个tableHeaderView"，一个UITableView有一个tableHeaderView，然后依靠viewForHeaderInSection和heightForHeaderInSection方法为每个节放置自定义标题视图，否则，您只需使用titleForHeaderInSection在那里放置文本

I think you are confusing the table header and the header for each section, they are different. There is no "second tableHeaderView", a UITableView has one tableHeaderView and then depends on the viewForHeaderInSection and heightForHeaderInSection methods to place custom header views for each section, otherwise you just use titleForHeaderInSection to place text there.

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