swift微博第5天(未登录界面的布局)

// 定义一个变量保存当前用户是否登录
 var userLogin = false
 override func loadView() {
  userLogin ? super.loadView() : setViewUp()
  }
 // MARK: 内部控制方法
 /*
  * 创建未登录界面
  */
 private func  setViewUp(){
  print("哈哈")
  let customView = VisitorView()
  customView.backgroundColor = UIColor.JKGlobalColor()
  view = customView
 }

下面的两个方法
    override init(frame: CGRect) {
   super.init(frame: frame)
  }
  // swift推荐我们自定义一个控件，要么用纯代码，要么用xib或者stroyboard
  required init?(coder aDecoder: NSCoder) {
    // 如果通过xib或者stroyboard创建该类，那么就会崩溃
    fatalError("init(coder:) has not been implemented")
  }

import UIKit

override init(frame: CGRect) {
    super.init(frame: frame)
    // 1.添加子控件
    addSubview(iconView)
    addSubview(homeIcob)
    addSubview(maskBGView)
    addSubview(messageLabel)
    addSubview(loginButton)
    addSubview(zhuceBtn)
    // 2.0布局子控件
    // 2.1.设置背景圈圈
    iconView.centerX = JKscreenW/2.0
    iconView.centerY = JKscreenH/2.0
    // 2.2.设置中间的小房子
    homeIcob.centerX = JKscreenW/2.0
    homeIcob.centerY = JKscreenH/2.0
    // 2.3.设置文本
    messageLabel.y = iconView.frame.maxY + 10
    messageLabel.centerX = JKscreenW/2.0
    // 2.4.设置按钮
    zhuceBtn.x = messageLabel.x
    zhuceBtn.y = messageLabel.frame.maxY + 10
    loginButton.x = messageLabel.frame.maxX - 100
    loginButton.y = messageLabel.frame.maxY + 10
    // 2.5.设置蒙版
    maskBGView.centerX = JKscreenW/2.0
    maskBGView.centerY = JKscreenH/2.0
}
// swift推荐我们自定义一个控件，要么用纯代码，要么用xib或者stroyboard
required init?(coder aDecoder: NSCoder) {
    // 如果通过xib或者stroyboard创建该类，那么就会崩溃
    fatalError("init(coder:) has not been implemented")
}
// MARK: 懒加载一些控件
// 转盘
private lazy var iconView: UIImageView = {
    let iv = UIImageView(image: UIImage(named: "visitordiscover_feed_image_smallicon"))
    return iv
}()
// 图标
private lazy var homeIcob: UIImageView = {
    let iv = UIImageView(image: UIImage(named: "visitordiscover_feed_image_house"))
    return iv
}()
// 文本
private lazy var messageLabel: UILabel = {
    let label = UILabel()
    label.height = NSString.JKtextStringHeight(string:"三月，醉一场青春的流年。慢步在三月的春光里，走走停停，看花开嫣然，看春雨绵绵，感受春风拂面，春天，就是青春的流年。", size: CGSize(width:224,height:1000), fontSize: 14)
    label.width = 224
    label.font = UIFont.systemFont(ofSize: 14)
    label.numberOfLines = 0
    label.textAlignment = NSTextAlignment.center
    label.textColor = UIColor.JKTextGayColor()
    label.text = "三月，醉一场青春的流年。慢步在三月的春光里，走走停停，看花开嫣然，看春雨绵绵，感受春风拂面，春天，就是青春的流年。"
    return label
}()
// 登录按钮
private lazy var loginButton: UIButton = {
    let login = UIButton()
    login.width = 100
    login.height = 30
    login.setTitleColor(UIColor.JKTextGayColor(), for: UIControlState.normal)
    login.setTitle("登录", for: UIControlState.normal)
    login.setBackgroundImage(UIImage(named: "common_button_white_disable"), for: UIControlState.normal)
    return login
}()
// 注册按钮
private lazy var zhuceBtn: UIButton = {
    let zhuce = UIButton()
    zhuce.width = 100
    zhuce.height = 30
    zhuce.setTitleColor(UIColor.orange, for: UIControlState.normal)
    zhuce.setTitle("注册", for: UIControlState.normal)
    zhuce.setBackgroundImage(UIImage(named: "common_button_white_disable"), for: UIControlState.normal)
    return zhuce
}()
// 蒙版的添加
private lazy var maskBGView: UIImageView = {
    // UIImageView 的初始化
    let maskbgView = UIImageView(image: UIImage(named:"visitordiscover_feed_mask_smallicon"))
    // UIImageView 的frame
    //  maskbgView.frame = CGRect(x:10,y:10,width:100,height:100)
    // UIImageView 的图片填充方式
    maskbgView.contentMode = UIViewContentMode.scaleAspectFill
    return maskbgView
  }()