标题部分

Question

我正在尝试复制标题部分，如下图所示：

我试图在同一视图中添加标签和分隔线。 到目前为止，我的代码根本不起作用......

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

    CGRect sepFrame = CGRectMake(0, 50-1, 320, 1);
    UIView *customView = [[UIView alloc] initWithFrame:sepFrame];
    customView.backgroundColor = [UIColor colorWithWhite:224.0/255.0 alpha:1.0];

    UILabel *sectionHeader = [[UILabel alloc] initWithFrame:CGRectNull];
    sectionHeader.backgroundColor = [UIColor whiteColor];
    sectionHeader.textAlignment = NSTextAlignmentCenter;
    sectionHeader.font = [UIFont boldSystemFontOfSize:16];
    sectionHeader.textColor = [UIColor colorWithRed:(66/255.0) green:(139/255.0) blue:(18/255.0) alpha:1] ;
    //sectionHeader.text = [NSString stringWithFormat:@"Section %d", section];

    switch (section) {
        case 0:
            sectionHeader.text =NSLocalizedString(@"ACTIVO", nil) ;
            [customView addSubview:sectionHeader];
            break;
        case 1:
            sectionHeader.text = NSLocalizedString(@"PASSIVO",nil);
            [customView addSubview:sectionHeader];
            break;
    }

    return customView;
}

任何帮助都会非常感谢，因为我是IOS的新手，非常感谢。

Answer 1

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

    CGRect sepFrame = CGRectMake(0, 50-1, 320, 44); //FIX THIS
    UIView *customView = [[UIView alloc] initWithFrame:sepFrame];
    customView.backgroundColor = [UIColor colorWithWhite:224.0/255.0 alpha:1.0];

    UILabel *sectionHeader = [[UILabel alloc] initWithFrame:sepFrame]; //FIX THIS
    sectionHeader.backgroundColor = [UIColor whiteColor];
    sectionHeader.textAlignment = NSTextAlignmentCenter;
    sectionHeader.font = [UIFont boldSystemFontOfSize:16];
    sectionHeader.textColor = [UIColor colorWithRed:(66/255.0) green:(139/255.0) blue:(18/255.0) alpha:1] ;
    //sectionHeader.text = [NSString stringWithFormat:@"Section %d", section];


    switch (section) {
        case 0:
            sectionHeader.text =NSLocalizedString(@"ACTIVO", nil) ;
            break;
        case 1:
            sectionHeader.text = NSLocalizedString(@"PASSIVO",nil);
            break;                
    }
    [customView addSubview:sectionHeader];

    return customView;
}

您需要为UI元素提供适当的帧。在上面的代码中查找“// FIX THIS”。

Answer 2

尝试使用此方法

-(UIView*)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section
{
     CGRect sepFrame = CGRectMake(0, 50-1, 320, 50); // change here your view's height
UIView *customView = [[UIView alloc] initWithFrame:sepFrame];
customView.backgroundColor = [UIColor colorWithWhite:224.0/255.0 alpha:1.0];

UILabel *sectionHeader = [[UILabel alloc] initWithFrame:sepFrame]; // also change here in label frame
sectionHeader.backgroundColor = [UIColor whiteColor];
sectionHeader.textAlignment = NSTextAlignmentCenter;
sectionHeader.font = [UIFont boldSystemFontOfSize:16];
sectionHeader.textColor = [UIColor colorWithRed:(66/255.0) green:(139/255.0) blue:(18/255.0) alpha:1] ;
//sectionHeader.text = [NSString stringWithFormat:@"Section %d", section];

switch (section) {
    case 0:
        sectionHeader.text =NSLocalizedString(@"ACTIVO", nil) ;
        [customView addSubview:sectionHeader];
        break;
    case 1:
        sectionHeader.text = NSLocalizedString(@"PASSIVO",nil);
        [customView addSubview:sectionHeader];
        break;
}

return customView;

}

//并编写此方法

-(CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section
{
    return 50;
}

Answer 3

以下代码应该完成您想要的（包括底部的行）：

- (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section {
    UIView *customView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 44)];
    customView.backgroundColor = [UIColor colorWithWhite:224.0/255.0 alpha:1.0];

    UILabel *sectionHeader = [[UILabel alloc] initWithFrame:customView.frame];
    sectionHeader.backgroundColor = [UIColor clearColor];
    sectionHeader.textAlignment = NSTextAlignmentCenter;
    sectionHeader.font = [UIFont boldSystemFontOfSize:16];
    sectionHeader.textColor = [UIColor colorWithRed:(66/255.0) green:(139/255.0) blue:(18/255.0) alpha:1];
    sectionHeader.text = NSLocalizedString(section == 0 ? @"ACTIVO" : @"PASSIVO", nil);
    [customView addSubview:sectionHeader];

    UIView *lineView = [[UIView alloc] initWithFrame:CGRectMake(0, customView.frame.size.height - 1, customView.frame.size.width, 1)];    
    lineView.backgroundColor = [UIColor colorWithRed:(66/255.0) green:(139/255.0) blue:(18/255.0) alpha:1];    
    [customView addSubview:lineView];    

    return customView;
}

Answer 4

查看以下文档：

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

它声明您还必须实施：

-(CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section;

让它正常工作。