我有一个带有UITableView的xib文件,我想使用委托方法tableView：viewForHeaderInSection：添加一个自定义的部分标题视图.有没有可能在Interface Builder中设计它,然后以编程方式更改其中的一些子视图的属性？
我的UITableView具有更多的部分标题,因此在Interface Builder中创建一个UIView并返回它不起作用,因为我必须复制它,但没有任何好的方法.归档和取消归档它对于UIImages不起作用,所以UIImageViews将显示空白.
此外,我不想以编程方式创建它们,因为它们太复杂,并且生成的代码将难以阅读和维护.
编辑1：对于那些还不明白的人,真的需要一些无用的代码来理解它,这里是我的tableView：viewForHeaderInSection：方法：
- (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section {
if ([tableView.dataSource tableView:tableView numberOfRowsInSection:section] == 0) {
return nil;
}
CGSize headerSize = CGSizeMake(self.view.frame.size.width,100);
/* wrapper */
UIView *wrapperView = [UIView viewWithSize:headerSize];
wrapperView.backgroundColor = [UIColor colorWithHexString:@"2670ce"];
/* title */
CGPoint titleMargin = CGPointMake(15,8);
UILabel *titleLabel = [UILabel labelWithText:self.categoriesNames[section] andFrame:CGEasyRectMake(titleMargin,CGSizeMake(headerSize.width - titleMargin.x * 2,20))];
titleLabel.textColor = [UIColor whiteColor];
titleLabel.font = [UIFont fontWithStyle:FontStyleRegular andSize:14];
[wrapperView addSubview:titleLabel];
/* body wrapper */
CGPoint bodyWrapperMargin = CGPointMake(10,8);
CGPoint bodyWrapperViewOrigin = CGPointMake(bodyWrapperMargin.x,CGRectGetMaxY(titleLabel.frame) + bodyWrapperMargin.y);
CGSize bodyWrapperViewSize = CGSizeMake(headerSize.width - bodyWrapperMargin.x * 2,headerSize.height - bodyWrapperViewOrigin.y - bodyWrapperMargin.y);
UIView *bodyWrapperView = [UIView viewWithFrame:CGEasyRectMake(bodyWrapperViewOrigin,bodyWrapperViewSize)];
[wrapperView addSubview:bodyWrapperView];
/* image */
NSInteger imageSize = 56;
NSString *imageName = [self getCategoryResourceItem:section + 1][@"image"];
UIImageView *imageView = [UIImageView imageViewWithImage:[UIImage imageNamed:imageName] andFrame:CGEasyRectMake(CGPointZero,CGEqualSizeMake(imageSize))];
imageView.layer.masksToBounds = YES;
imageView.layer.cornerRadius = imageSize / 2;
[bodyWrapperView addSubview:imageView];
/* labels */
NSInteger labelsWidth = 60;
UILabel *firstLabel = [UILabel labelWithText:@"first" andFrame:CGRectMake(imageSize + bodyWrapperMargin.x,labelsWidth,16)];
[bodyWrapperView addSubview:firstLabel];
UILabel *secondLabel = [UILabel labelWithText:@"second" andFrame:CGRectMake(imageSize + bodyWrapperMargin.x,20,16)];
[bodyWrapperView addSubview:secondLabel];
UILabel *thirdLabel = [UILabel labelWithText:@"third" andFrame:CGRectMake(imageSize + bodyWrapperMargin.x,40,16)];
[bodyWrapperView addSubview:thirdLabel];
[@[ firstLabel,secondLabel,thirdLabel ] forEachView:^(UIView *view) {
UILabel *label = (UILabel *)view;
label.textColor = [UIColor whiteColor];
label.font = [UIFont fontWithStyle:FontStyleLight andSize:11];
}];
/* line */
UIView *lineView = [UIView viewWithFrame:CGRectMake(imageSize + labelsWidth + bodyWrapperMargin.x * 2,bodyWrapperMargin.y,1,bodyWrapperView.frame.size.height - bodyWrapperMargin.y * 2)];
lineView.backgroundColor = [UIColor whiteColorWithAlpha:0.2];
[bodyWrapperView addSubview:lineView];
/* progress */
CGPoint progressSliderOrigin = CGPointMake(imageSize + labelsWidth + bodyWrapperMargin.x * 3 + 1,bodyWrapperView.frame.size.height / 2 - 15);
CGSize progressSliderSize = CGSizeMake(bodyWrapperViewSize.width - bodyWrapperMargin.x - progressSliderOrigin.x,30);
UiSlider *progressSlider = [UiSlider viewWithFrame:CGEasyRectMake(progressSliderOrigin,progressSliderSize)];
progressSlider.value = [self getCategoryProgress];
[bodyWrapperView addSubview:progressSlider];
return wrapperView;
}
我希望它看起来像这样：
- (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section {
if ([tableView.dataSource tableView:tableView numberOfRowsInSection:section] == 0) {
return nil;
}
SectionView *sectionView = ... // get the view that is already designed in the Interface Builder
sectionView.headerText = self.categoriesNames[section];
sectionView.headerImage = [self getCategoryResourceItem:section + 1][@"image"];
sectionView.firstLabelText = @"first";
sectionView.secondLabelText = @"second";
sectionView.thirdLabelText = @"third";
sectionView.progress = [self getCategoryProgress];
return wrapperView;
}
编辑2：我不使用故事板,只是.xib文件.此外,我没有一个UITableViewController,只是一个UIViewController,其中我添加了一个UITableView.
解决方法
故事板或XIB
>相同的故事板：
return tableView.dequeueReusableCell(withIdentifier: "header")
>分离XIB(附加步骤：您必须先注册该Nib)：
tableView.register(UINib(nibName: "XIBSectionHeader",bundle:nil),forCellReuseIdentifier: "xibheader")
要从故事板而不是XIB加载,请参阅this Stack Overflow answer.
使用UITableViewCell在IB中创建节标题
利用一个section头是一个普通的UIView,UITableViewCell也是一个UIView的事实.在Interface Builder中,拖动&将表视图单元格从对象库中删除到表视图原型内容.
向新添加的表视图单元添加标识符,并根据需要自定义其外观.对于这个例子,我使用了标题.
使用dequeueReusableCell：withIdentifier来定位您的段标题,就像任何表视图单元格一样.您将需要提供heightForHeaderInSection,为了清楚,硬编码为44
//MARK: UITableViewDelegate
override func tableView(_ tableView: UITableView,viewForHeaderInSection section: Int) -> UIView?
{
// This is where you would change section header content
return tableView.dequeueReusableCell(withIdentifier: "header")
}
override func tableView(_ tableView: UITableView,heightForHeaderInSection section: Int) -> CGFloat
{
return 44
}
Swift 2&早期：
return tableView.dequeueReusableCellWithIdentifier("header") as? UIView
self.tableView.registerNib(UINib(nibName: "XIBSectionHeader",forCellReuseIdentifier: "xibheader")
►在GitHub上查找此解决方案,并在Swift Recipes上查看更多详细信息.
