ios - TableView 的 textLabel 高度根据内容
<p><p>我制作了一个折叠的 TableView。 tableView 的标签大小不会根据内容增加。我已经设置了 WordWrap 和 Lines = 0 但它仍然无法正常工作。
我正在使用 2 个 tableView 单元格来制作折叠 View 。</p>
<pre><code>extension UIView {
func rotate(toValue: CGFloat, duration: CFTimeInterval = 0.2, completionDelegate: AnyObject? = nil) {
let rotateAnimation = CABasicAnimation(keyPath: "transform.rotation")
rotateAnimation.toValue = toValue
rotateAnimation.duration = duration
rotateAnimation.removedOnCompletion = false
rotateAnimation.fillMode = kCAFillModeForwards
if let delegate: AnyObject = completionDelegate {
rotateAnimation.delegate = delegate
}
self.layer.addAnimation(rotateAnimation, forKey: nil)
}
}
class CollapsibleTableViewController: UITableViewController {
struct Section {
var name: String!
var items: !
var collapsed: Bool!
init(name: String, items: , collapsed: Bool = false) {
self.name = name
self.items = items
self.collapsed = collapsed
}
}
var sections = ()
override func viewDidLoad() {
super.viewDidLoad()
sections = )]
}
override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
return sections.count
}
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return (sections.collapsed!) ? 0 : sections.items.count
}
override func tableView(tableView: UITableView, viewForHeaderInSection section: Int) -> UIView? {
let header = tableView.dequeueReusableCellWithIdentifier("header") as! CollapsibleTableViewHeader
header.toggleButton.tag = section
header.titleLabel.text = sections.name
header.toggleButton.rotate(sections.collapsed! ? 0.0 : CGFloat(M_PI_2))
header.toggleButton.addTarget(self, action: #selector(CollapsibleTableViewController.toggleCollapse), forControlEvents: .TouchUpInside)
return header.contentView
}
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("cell") as UITableViewCell!
cell.textLabel?.lineBreakMode = NSLineBreakMode.ByWordWrapping
cell.textLabel?.numberOfLines = 0
cell.textLabel?.text = sections.items
return cell
}
//
// MARK: - Event Handlers
//
func toggleCollapse(sender: UIButton) {
let section = sender.tag
let collapsed = sections.collapsed
// Toggle collapse
sections.collapsed = !collapsed
// Reload section
tableView.reloadSections(NSIndexSet(index: section), withRowAnimation: .Automatic)
}
}
</code></pre>
<p> <a href="/image/0XJkG.png" rel="noreferrer noopener nofollow"><img src="/image/0XJkG.png" alt="enter image description here"/></a> </p></p>
<br><hr><h1><strong>Best Answer-推荐答案</ strong></h1><br>
<p><p>试试这个代码:</p>
<pre><code> func tableView(tableView: UITableView, heightForHeaderInSection section: Int) -> CGFloat {
var lblSectionName: UILabel = UILabel()
lblSectionName.text = self.sectionNames
lblSectionName.numberOfLines = 0
lblSectionName.lineBreakMode = .ByWordWrapping
lblSectionName.sizeToFit()
return lblSectionName.frame.size.height
}
func tableView(tableView: UITableView, viewForHeaderInSection section: Int) -> UIView? {
var lblSectionName: UILabel = UILabel()
lblSectionName.text = self.sectionNames
lblSectionName.numberOfLines = 0
lblSectionName.lineBreakMode = .ByWordWrapping
lblSectionName.sizeToFit()
return lblSectionName
}
</code></pre></p>
<p style="font-size: 20px;">关于ios - TableView 的 textLabel 高度根据内容，我们在Stack Overflow上找到一个类似的问题：
<a href="https://stackoverflow.com/questions/38971081/" rel="noreferrer noopener nofollow" style="color: red;">
https://stackoverflow.com/questions/38971081/
</a>
</p>
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