TableHeaderView、TableFooterView 自动高度

UIView 中的设置

import UIKit

class MultiLineLabelHeaderFooterView: UIView {

    @IBOutlet weak var contentLabel: UILabel!
    
    /*
    // Only override draw() if you perform custom drawing.
    // An empty implementation adversely affects performance during animation.
    override func draw(_ rect: CGRect) {
        // Drawing code
    }
    */
    
    override func awakeFromNib() {
        super.awakeFromNib()
        
        self.contentLabel.textColor = UIColor.textMinorColor
    }
    
    override func layoutSubviews() {
        super.layoutSubviews()
        
        contentLabel.preferredMaxLayoutWidth = contentLabel.bounds.width
    }

}

UIViewController 中的设置

设置 初始化 footerView

override func viewDidLoad() {
        super.viewDidLoad()

        // Do any additional setup after loading the view.

        // ... 其他设置

        let footerView = Bundle.loadView(fromNib: "MultiLineLabelHeaderFooterView", withType: MultiLineLabelHeaderFooterView.self)
        footerView.contentLabel.text = "这里是 tableFooterView 这里是 tableFooterView 这里是 tableFooterView 这里是 tableFooterView 这里是 tableFooterView 这里是 tableFooterView 这里是 tableFooterView 这里是 tableFooterView "
        self.tableView.tableFooterView = footerView
        
        
        self.queryPlanList()
    }

autoLayout 重排

override func viewDidLayoutSubviews() {
        super.viewDidLayoutSubviews()
        
        if let footerView = tableView.tableFooterView {
            let height = footerView.systemLayoutSizeFitting(UILayoutFittingCompressedSize).height
            var frame = footerView.frame
            
            if height != frame.size.height {
                frame.size.height = height
                footerView.frame = frame
                self.tableView.tableFooterView = footerView
            }
        }
    }