我正在尝试以编程方式设计我的自定义UITableView单元格的布局。但是,我得到一些奇怪的行为:尽管设置了rowHeight,前四行是默认高度,然后其余的是我指定的。这会影响我的单元格的设计,因为我会以编程方式部署行高度来布置标签。
我按如下方式初始化tableview:
func gameTableInit() {
gameTableView = UITableView()
gameTableView.delegate = self
gameTableView.dataSource = self
let navFrame = self.navigationController?.view.frame
gameTableView.frame = CGRect(x: navFrame!.minX, y: navFrame!.maxY, width: self.view.frame.width, height: self.view.frame.height - navFrame!.height - (self.tabBarController?.view.frame.height)!)
gameTableView.rowHeight = gameTableView.frame.height/4 //HEIGHT OF TABLEVIEW CELL
gameTableView.register(GameCell.self, forCellReuseIdentifier: "cell")
self.view.addSubview(gameTableView)
}
这是我的cellForRowAtIndexPath函数:
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cell") as! GameCell
print("height of cell: \(cell.frame.height)")
var game = Game()
game.awayTeam = "CLE"
game.homeTeam = "GSW"
cell.setUIFromGame(g: game)
return cell
}
print语句打印:
细胞高度:44.0
细胞高度:44.0
细胞高度:44.0
细胞高度:44.0
经过一些滚动后,它会打印出预期的:
细胞高度:166.75
...
我创建了一个名为GameCell
的自定义tableview单元格class GameCell: UITableViewCell {
override func awakeFromNib() {
super.awakeFromNib()
// Initialization code
}
override func setSelected(_ selected: Bool, animated: Bool) {
super.setSelected(selected, animated: animated)
// Configure the view for the selected state
}
override func layoutSubviews() {
super.layoutSubviews()
positionUIElements()
}
override init(style: UITableViewCellStyle, reuseIdentifier: String?) {
super.init(style: style, reuseIdentifier: reuseIdentifier)
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
//on left
var awayTeamAbbrev = UILabel()
var awayTeamLogo: UIImage!
//on right
var homeTeamAbbrev = UILabel()
var homeTeamLogo: UIImage!
func positionUIElements() {
//away team abbreviation is centered on upper left half of cell
awayTeamAbbrev.frame = CGRect(x: self.frame.minX, y: self.frame.minY, width: self.frame.midX, height: self.frame.height/4)
awayTeamAbbrev.textAlignment = .center
awayTeamAbbrev.adjustsFontSizeToFitWidth = true
//awayTeamLogo
//home team abbreviation is centered on upper right half of cell
homeTeamAbbrev.frame = CGRect(x: self.frame.midX, y: self.frame.minY, width: self.frame.midX, height: self.frame.height/4)
homeTeamAbbrev.textAlignment = .center
homeTeamAbbrev.adjustsFontSizeToFitWidth = true
//homeTeamLogo
self.contentView.addSubview(awayTeamAbbrev)
self.contentView.addSubview(homeTeamAbbrev)
}
func setUIFromGame(g: Game) {
awayTeamAbbrev.text = g.awayTeam!
homeTeamAbbrev.text = g.homeTeam!
}
}
我在网上尝试了许多建议的答案,比如调用layoutIfNeeded,但是在我尝试的任何地方都没有用。
答案 0 :(得分:2)
我找到了一个有效的解决方案:在我的GameCell课程中,我重写了布局子视图:
override func layoutSubviews() {
super.layoutSubviews()
self.contentView.layoutIfNeeded()
positionUIElements()
self.awayTeamAbbrev.preferredMaxLayoutWidth = self.awayTeamAbbrev.frame.size.width
self.homeTeamAbbrev.preferredMaxLayoutWidth = self.homeTeamAbbrev.frame.size.width
}
答案 1 :(得分:2)
虽然接受的答案在某些情况下可能会有所帮助,但我想分享一些其他方法来解决此问题:
在您的单元格中添加:
override func didMoveToSuperview() {
super.didMoveToSuperview()
layoutIfNeeded()
答案 2 :(得分:0)
44是UITableView中UITableViewCell的defailt高度,尝试覆盖func
df.groupby(0).rank().style.background_gradient()
或返回准确值,在您的情况下为166.75