1.UILabel 的自適應(yīng)
(1)無(wú)其他控件，使用純代碼

  dOtherDescribeLabel.numberOfLines = 3
        dOtherDescribeLabel.textAlignment = .left
        dOtherDescribeLabel.textColor = UIColor.gray
        // 設(shè)置label的最大寬度
        dOtherDescribeLabel.preferredMaxLayoutWidth = 100
        dOtherDescribeLabel.font = UIFont.systemFont(ofSize: 15)
        // label做自適應(yīng)，多行顯示的時(shí)候，只設(shè)置寬就好，高會(huì)根據(jù)字號(hào)自            適應(yīng)顯示
        self.dOtherDescribeLabel.mas_makeConstraints { (make) in
            make?.top.mas_equalTo()(self.dLeftDescribeLabel.mas_top)
            make?.left.mas_equalTo()(self.dLeftDescribeLabel.mas_right)?.offset()(30)
            make?.width.mas_equalTo()(60)?.with().priority()(MASLayoutPriority(600))
           }

(2）有其他控件，所有控件都用xib布局，此時(shí)我們需要自適應(yīng)的label的上述(1)中的設(shè)置最好在xib上設(shè)置，理論上代碼與xib都是一樣的，但是視圖用代碼設(shè)置，xib與代碼存在未知沖突，導(dǎo)致設(shè)置不管用。所以在xib依次設(shè)置，切記優(yōu)先級(jí)不能任性寫，優(yōu)先級(jí)越高越好.
（1）設(shè)置label最大寬度

label最大寬度.png

設(shè)置label寬度優(yōu)先級(jí).png

(3)UITableViewCell 的高度自適應(yīng)

  var contentLabel: UILabel!
  var countryLabel: UILabel!
  var newsPaparLabel: UILabel!
  var timeLabel: UILabel!
  let marginTop: CGFloat = 10
  let marginLeft: CGFloat = 15
  override init(style: UITableViewCellStyle, reuseIdentifier: String?) {
        super.init(style: style, reuseIdentifier: reuseIdentifier)
        self.setupView()
        self.setupConstraint()
    }
    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
   func setupView() {
       let preferredWidth: CGFloat = UIScreen.main.bounds.size.width - marginLeft * 2
       let contentLabel = UILabel()
       contentLabel.preferredMaxLayoutWidth = preferredWidth
       contentLabel.numberOfLines = 4
       contentLabel.textAlignment = .left
       contentLabel.textColor = UIColor.black
       contentLabel.font = UIFont.systemFont(ofSize: 15)
       self.contentView.addSubview(contentLabel)
       self.contentLabel = contentLabel
       let countryLabel = UILabel()
       countryLabel.numberOfLines = 1
       countryLabel.textAlignment = .left
       countryLabel.textColor = UIColor.red
       countryLabel.font = UIFont.systemFont(ofSize: 11)
       countryLabel.setBorder(UIColor.red, 1, 3)
       self.contentView.addSubview(countryLabel)
       self.countryLabel = countryLabel
       let newsPaparLabel = UILabel()
       newsPaparLabel.numberOfLines = 1
       newsPaparLabel.textAlignment = .left
       newsPaparLabel.textColor = UIColor.init(red: 153.0/255.0, green: 153.0/255.0, blue: 153.0/255.0, alpha: 1)
       newsPaparLabel.font = countryLabel.font
       self.contentView.addSubview(newsPaparLabel)
       self.newsPaparLabel = newsPaparLabel
        
        let timeLabel = UILabel()
        timeLabel.numberOfLines = 1
        timeLabel.textAlignment = .left
        timeLabel.textColor = newsPaparLabel.textColor
        timeLabel.font = countryLabel.font
        self.contentView.addSubview(timeLabel)
        self.timeLabel = timeLabel
    }
 func setupConstraint() {
        let sueprView = self
        
        self.contentLabel.mas_makeConstraints { (make) in
            make?.top.mas_equalTo()(sueprView.marginTop)
            make?.right.mas_equalTo()(0-sueprView.marginLeft)
            make?.bottom.equalTo()(sueprView.contentView)?.with().offset()(0-sueprView.marginLeft)?.with().priority()(749)
            make?.left.mas_equalTo()(sueprView.marginLeft)
        }
        self.countryLabel.mas_makeConstraints { (make) in
            make?.top.equalTo()(sueprView.contentLabel.mas_bottom)?.with().offset()(25)
            make?.bottom.mas_equalTo()(0-sueprView.marginTop)
            make?.height.mas_equalTo()(20)?.with().priority()(1000)
            make?.left.equalTo()(sueprView.contentLabel)
        }
        self.newsPaparLabel.mas_makeConstraints { (make) in
            make?.top.equalTo()(sueprView.contentLabel.mas_bottom)?.with().offset()(25)
            make?.bottom.mas_equalTo()(0-sueprView.marginTop)
            make?.left.equalTo()(sueprView.countryLabel.mas_right)?.with().offset()(sueprView.marginLeft)
        }
        self.timeLabel.mas_makeConstraints { (make) in
            make?.top.equalTo()(sueprView.contentLabel.mas_bottom)?.with().offset()(25)
            make?.bottom.mas_equalTo()(0-sueprView.marginTop)
            make?.left.equalTo()(sueprView.newsPaparLabel.mas_right)?.with().offset()(sueprView.marginLeft)
        }
        
    }