我是SnapKit的初学者,我想用SnapKit实现UITableViewController,每行有两个UILabel,其中一个是Title,另一个是Value。
我的问题是UITableView中的行高不会根据每一行的内容而改变。
这是我的代码:
ViewController类:
TextBox
CustomCell类:
import UIKit
import SnapKit
class ViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {
// MARK: Property List
var list: NSMutableArray?
let myTableView: UITableView = {
let table = UITableView()
return table
}()
//MARK: Life Cycle
override func viewDidLoad() {
super.viewDidLoad()
self.myTableView.rowHeight = UITableView.automaticDimension
self.myTableView.estimatedRowHeight = 100
title = "TableView Page"
setup()
setupViews()
}
// MAKR: Setup View
func setup() {
self.view.backgroundColor = .white
navigationController?.navigationBar.prefersLargeTitles = true
}
func setupViews () {
self.view.addSubview(myTableView)
myTableView.snp.makeConstraints { make in
make.top.left.bottom.right.equalTo(10)
}
myTableView.register(CustomCell.self, forCellReuseIdentifier: CustomCell.customCell)
myTableView.delegate = self
myTableView.dataSource = self
}
// MARK: TableView DataSource
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 10
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: CustomCell.customCell, for: indexPath) as! CustomCell
cell.title.text = "title is lognest??"
cell.value.text = (indexPath.row % 2 == 0) ?
"longest value longest value longest value longest value longest value longest value longest value for text"
: "short value"
cell.title.snp.makeConstraints { (make) in
make.top.equalTo(cell.value.snp.top)
make.left.equalTo(20)
make.trailing.equalTo(cell.value.snp.leading)
}
cell.value.snp.makeConstraints { (make) in
make.right.equalTo(-20)
make.top.equalTo(cell.title.snp.top)
make.bottom.equalTo(-10)
}
NSLog("value height is: \(cell.value.frame.height)")
NSLog("cell height is: \(cell.frame.height)")
return cell;
}
}
这是控制台日志:
snapkitTest [26345:1387159]单元格高度是:44.0
snapkitTest [26345:1387159]值的高度是:0.0
答案 0 :(得分:2)
1-您必须将标签添加到
self.contentView.addSubview(title)
2-您需要将底部约束设置为contentView
title.snp.makeConstraints { (make) -> Void in
make.trailing.equalTo(value.snp.leading)
make.top.equalTo(self.contentView.snp.top).inset(10)
make.left.equalTo(20)
}
value.snp.makeConstraints { (make) -> Void in
make.right.equalTo(-40)
make.top.equalTo(self.contentView.snp.top).inset(10)
make.bottom.equalTo(-10)
}
也将此约束转移到单元格自定义类的init,以免在tableView的每个滚动中都重新添加约束