我想为这个UITableView制作一个自定义标题视图,我希望它是透明的.
我的代码…
接口…
typedef void(^ActionBlock)(); @interface MyViewHeaderView : UITableViewHeaderFooterView @property (nonatomic,strong) UIImageView *flagImageView; @property (nonatomic,strong) UILabel *leagueNameLabel; @property (nonatomic,copy) ActionBlock tapAction; @end
实现…
#import "MyViewHeaderView.h"
@interface MyViewHeaderView ()
@end
@implementation MyViewHeaderView
- (id)initWithReuseIdentifier:(NSString *)reuseIdentifier
{
self = [super initWithReuseIdentifier:reuseIdentifier];
if (self) {
// Add customisation here...
// I have tried everything here...
self.tintColor = [UIColor colorWithWhite:0.961 alpha:1.0];
self.alpha = 0.5;
// self.contentView.backgroundColor = [UIColor colorWithWhite:0.5 alpha:0.5];
// self.backgroundColor = [UIColor colorWithWhite:0.5 alpha:0.5];
// can't remember what else.
// none of it makes it transparent. It sets the colour against
// a white background. i.e. 50% transparent but with a white opaque background.
// so I can't see the content of the table scrolling behind it.
self.flagImageView = [[UIImageView alloc] init];
self.flagImageView.image = [UIImage imageNamed:@"placeholder_flag"];
[self.flagImageView setTranslatesAutoresizingMaskIntoConstraints:NO];
[self.contentView addSubview:self.flagImageView];
self.leagueNameLabel = [[UILabel alloc] init];
[self.leagueNameLabel setTranslatesAutoresizingMaskIntoConstraints:NO];
[self.contentView addSubview:self.leagueNameLabel];
UITapGestureRecognizer *tapGestureRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(viewTapped)];
tapGestureRecognizer.numberOfTapsrequired = 1;
tapGestureRecognizer.numberOfTouchesrequired = 1;
[self.contentView addGestureRecognizer:tapGestureRecognizer];
[self setupConstraints];
}
return self;
}
- (void)setupConstraints
{
// adding constraints...
}
- (void)viewTapped
{
self.tapAction();
}
@end
在我的UITableViewDelegate我正在加载头像…
- (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section
{
MyViewHeaderView *headerView = [tableView dequeueReusableHeaderFooterViewWithIdentifier:@"HeaderView"];
League *league = self.leagues[(NSUInteger) section];
headerView.leagueNameLabel.text = league.name;
headerView.tapAction = ^(){
[self leagueTapped:league];
};
return headerView;
}
我想要一个标题视图,如标准视图,您可以在其中查看在其后面滚动的表视图内容.
请你让我知道如何做到这一点.
解决方法
请原谅我无法使用stackoverflow ….
这是我如何设法实现它,使用这两个这些UITableviewDelegate方法：
- (void)tableView:(UITableView *)tableView willDisplayHeaderView:(UIView *)view forSection:(NSInteger)section {
if ([view isMemberOfClass:[UITableViewHeaderFooterView class]]) {
((UITableViewHeaderFooterView *)view).backgroundView.backgroundColor = [UIColor clearColor];
}
}
- (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section {
UITableViewHeaderFooterView *FeedHeaderView = [tableView dequeueReusableHeaderFooterViewWithIdentifier:@"HeaderIdentifier"];
//Other customizations
return FeedHeaderView;
}
希望有帮助,让我永远弄清楚.似乎backgroundView不是在init中创建的,所以颜色不能被覆盖在那里.
