爱听音乐的狗

有趣，古怪，奇异

士不可以不弘毅，任重而道远

• 于 Swift 阅读

基础控制器的构建与设备方向的控制

涉及知识点

1、基于UIViewController构建基础控制器
2、基于UINavigationController构建导航控制器并添加Pop手势
3、基于UITabBarController构建主控制器
4、指定控制器可进行设备方向翻转

具体实现

1、基于UIViewController构建基础控制器

1.1 自定义导航栏

在定制导航栏中所包含的内容时，主要是考虑绝大部分控制器所需要的控件，所以通常包含左返回按钮，标题视图以及标题，右侧设置按钮。部分iPhone手机带有刘海，statusBar的高度也不再是以前的20，所以更好做法是将导航视图分为statusBar高度的视图和其他视图，一起构成导航视图。如下所示

// MARK: set & get 方法


/// navigationView
lazy var navigationView: UIView = {
    let navigationView = UIView.init(frame: CGRect.zero)
    navigationView.backgroundColor = UIColor.white
    navigationView.addSubview(self.statusView)
    navigationView.addSubview(self.moreNaviView)
    navigationView.addSubview(self.lineView)
    return navigationView
}()
/// 去除状态栏剩余view
lazy var moreNaviView: UIView = {
    let moreNaviView = UIView.init(frame: CGRect.zero)
    view.backgroundColor = UIColor.white
    moreNaviView.addSubview(self.titleView)
    return moreNaviView
}()
/// 状态栏高度的视图
lazy var statusView: UIView = {
    let statusView = UIView.init(frame: CGRect.zero)
    statusView.backgroundColor = UIColor.white
    return statusView
}()

lazy var backButton: UIButton = {
    let button = UIButton.init(frame: CGRect.init(x: 10, y: 0, width: 100, height: 44))
    button.setTitle("返回", for: .normal)
    button.setTitleColor(UIColor.black, for: .normal)
    button.setTitleColor(UIColor.lightGray, for: .highlighted)
    button.titleLabel?.font = UIFont.systemFont(ofSize: 16)
    button.setImage(UIImage.init(named: "黑色向左箭头"), for: .normal)
    button.setImage(UIImage.init(named: "向左箭头"), for: .highlighted);
    button.titleLabel?.adjustsFontSizeToFitWidth = true
    button.contentHorizontalAlignment = .left
    button.titleEdgeInsets = UIEdgeInsets.init(top: 0, left: 5, bottom: 0, right: 0)
    button.addTarget(self, action: #selector(backButtonDidClicked(button:)), for: .touchUpInside)
    return button
}()

lazy var rightButton: UIButton = {
    let button = UIButton.init(type: UIButton.ButtonType.custom)
    button.setTitleColor(UIColor.black, for: UIControl.State.normal)
    button.setTitleColor(UIColor.lightGray, for: .highlighted)
    button.titleLabel?.font = UIFont.systemFont(ofSize: 16)
    button.titleLabel?.adjustsFontSizeToFitWidth = true
    button.titleLabel?.contentMode = UIView.ContentMode.center
    button.addTarget(self, action: #selector(rightButtonDidClicked(button:)), for: .touchUpInside)
    return button
}()

lazy var lineView: UIView = {
    let lineView = UIView.init(frame: CGRect.zero)
    lineView.backgroundColor = UIColor.gray
    return lineView
}()

// MARK: 私有 set & get 方法

private lazy var titleView: UIView = {
    let titleView = UIView.init(frame: CGRect.zero)
    titleView.addSubview(self.titleLabel)
    return titleView
}()

private lazy var titleLabel :UILabel =  {
    let label = UILabel.init(frame: CGRect.zero)
    label.font = UIFont.systemFont(ofSize: 16)
    label.adjustsFontSizeToFitWidth = true
    label.textAlignment = .center
    return label
}()

1.2 添加导航栏视图并布局

可在控制器中重写viewDidLoad()方法，进行视图的添加，需要注意的是自定义导航栏视图部分控件的frame不能写死，需要实现自动布局，否则在某些指定的控制器中实现设备方向翻转时导航视图会出现frame问题，使用的布局框架是SnapKit，布局如下所示

//MARK: 重写的方法和属性
override func viewDidLoad() {
    super.viewDidLoad()
    // 添加基本视图
    self.configBaseUI()

}

// MARK: 本类公共方法
/// 设置UI
private func configBaseUI() {
    self.view.backgroundColor = UIColor.colorWithHex(rgb: 0xb2b2b2)
    self.view.addSubview((self.navigationView))
    self.view.bringSubviewToFront(self.navigationView)
    self.makeConstraint()
}

/// 约束
private func makeConstraint() {
    self.navigationView.snp.makeConstraints { (make) in
        make.left.equalToSuperview()
        make.right.equalToSuperview()
        make.top.equalToSuperview()
        make.height.equalTo(JJ_NAVIGATION_HEIGHT)
    }
    self.statusView.snp.makeConstraints { (make) in
        make.left.equalToSuperview()
        make.right.equalToSuperview()
        make.top.equalToSuperview()
        make.height.equalTo(JJ_STATUS_HEIGHT)
    }
    self.moreNaviView.snp.makeConstraints { (make) in
        make.left.equalToSuperview()
        make.right.equalToSuperview()
        make.top.equalTo(JJ_STATUS_HEIGHT)
        make.height.equalTo(JJ_NAVIGATION_MOREHEIGHT)
    }
    self.lineView.snp.makeConstraints { (make) in
        make.left.equalToSuperview()
        make.right.equalToSuperview()
        make.top.equalTo(JJ_NAVIGATION_HEIGHT - 1)
        make.height.equalTo(1)
    }
    self.titleView.snp.makeConstraints { (make) in
        make.left.equalToSuperview().offset(100)
        make.right.equalToSuperview().offset(-100)
        make.top.equalToSuperview()
        make.height.equalToSuperview()
    }
    self.titleLabel.snp.makeConstraints { (make) in
        make.left.equalToSuperview()
        make.right.equalToSuperview()
        make.top.equalToSuperview()
        make.height.equalToSuperview()
    }
}

在做布局时使用到了JJ_NAVIGATION_HEIGHT、JJ_STATUS_HEIGHT、JJ_NAVIGATION_MOREHEIGHT等常量，主要作用是需要做屏幕适配（关于适配方面的问题，可以参考iPhone X 屏幕适配从选择到 “放弃”），涉及到的3个常量如下所示：

/// iphone x/xs/xsMax/xr 44, 其他20    iphonex/xs: 375.f, 812.f iphonexr/xsMax: 414.f, 896.f
  let JJ_STATUS_HEIGHT = ((__CGSizeEqualToSize(CGSize.init(width: 375, height: 812), UIScreen.main.bounds.size) == true ||
                   __CGSizeEqualToSize(CGSize.init(width: 812, height: 375),
UIScreen.main.bounds.size) == true ||
                   __CGSizeEqualToSize(CGSize.init(width: 414, height: 896),
UIScreen.main.bounds.size) == true ||
                   __CGSizeEqualToSize(CGSize.init(width: 896, height: 414),
UIScreen.main.bounds.size) == true)
                  ? 44 : 20)

/// navigation除掉status的高度
let JJ_NAVIGATION_MOREHEIGHT = (44)

/// navigation高度
let JJ_NAVIGATION_HEIGHT = (JJ_STATUS_HEIGHT +
JJ_NAVIGATION_MOREHEIGHT)

1.3 状态栏的控制

有时需要对状态栏显示的状态以及是否隐藏状态栏进行控制，但是对应的”preferredStatusBarStyle”与”prefersStatusBarHidden”属性只提供了get，而不能进行set，所以需要重写对应的属性，实现对状态栏的控制

// MARK: 属性

/// 状态栏状态
private var _statusBarStyle:UIStatusBarStyle?
/// 状态栏状态
var statusBarStyle: UIStatusBarStyle? {
    get {
        return _statusBarStyle
    }
    set {
        _statusBarStyle = newValue
        self.setNeedsStatusBarAppearanceUpdate()
    }
}
/// 是否隐藏状态栏
private var _statusBarHidden:Bool?
/// 是否隐藏状态栏
var statusBarHidden: Bool? {
    get {
        return _statusBarHidden
    }
    set {
        _statusBarHidden = newValue;
        self.setNeedsStatusBarAppearanceUpdate()
    }
}

//MARK: 重写的方法和属性
override var preferredStatusBarStyle: UIStatusBarStyle {
    if self.statusBarStyle != nil {
        return self.statusBarStyle!
    }
    return super.preferredStatusBarStyle
}

override var prefersStatusBarHidden: Bool {
    if self.statusBarHidden != nil {
        return self.statusBarHidden!
    }
    return super.prefersStatusBarHidden
}

1.4 方法调用

在基础控制器中应当提供常用的方法，用于方便子控制器来进行调用，提高效率，比如说导航栏的基本设置、颜色、文字等，需要注意的是按钮点击的方法需要加上 @objc才能公开给Objective-C，如下所示

// MARK: 子类调用方法


/// 导航栏基本设置
func defaultNavigation() {
    self.setNavigation(color: UIColor.white)
    self.statusBarStyle = .default
    self.setNavigation(titleColor: UIColor.black)
}

/// 设置导航栏背景色
func setNavigation(color:UIColor) {
    self.navigationView.backgroundColor = color
    self.moreNaviView.backgroundColor = color
    self.statusView.backgroundColor = color
}
/// 设置导航栏文字
func setNavigation(title: String) {
    self.setNavigation(title: title, titleColor: nil)
}

/// 设置导航栏文字颜色
///
/// - Parameter titleColor: titleColor description
func setNavigation(titleColor:UIColor) {
    self.setNavigation(title: nil, titleColor: titleColor)
}
/// 设置导航栏文字和文字颜色
func setNavigation(title: String?, titleColor:UIColor?) {
    self.titleLabel.text = title ?? ""
    self.titleLabel.textColor = titleColor ?? UIColor.black
}
/// 设置导航栏文字和导航栏颜色
func setNavigation(color:UIColor, title:String) {
    self.setNavigation(color: color)
    self .setNavigation(title: title)
}
/// 添加返回按钮
func addBackButton() {
    self.moreNaviView.addSubview(self.backButton)
}

/// 添加右侧按钮
///
/// - Parameters:
///   - title: title description
///   - titleColor: titleColor description
///   - imageName: imageName description
func addRightButton(title:String?, titleColor:UIColor?, imageName:String? ) {
    self.rightButton.setTitle(title, for: UIControl.State.normal)
    self.rightButton.setTitleColor(titleColor, for: UIControl.State.normal)
    self.rightButton.setImage(UIImage.init(named: imageName ?? ""), for: UIControl.State.normal)
    self.moreNaviView.addSubview(self.rightButton)
    self.rightButton.snp.makeConstraints { (make) in
        make.width.equalTo(JJ_NAVIGATION_MOREHEIGHT)
        make.height.equalTo(JJ_NAVIGATION_MOREHEIGHT)
        make.top.equalToSuperview()
        make.right.equalToSuperview().offset(-10)
    }
}

/// 添加右侧按钮
///
/// - Parameter imageName: imageName description
func addRightButton(imageName:String) {
    self.addRightButton(title: nil, titleColor: nil, imageName: imageName)
}

/// 添加右侧按钮
///
/// - Parameters:
///   - title: title description
///   - titleColor: titleColor description
func addRightButton(title:String, titleColor:UIColor) {
    self.addRightButton(title: title, titleColor: titleColor, imageName: nil)
}

/// 是否显示导航栏底部灰线
///
/// - Parameter show: show description
func showNavBottomLine(show:Bool) {
    self.lineView.isHidden = !show
}

/// 是否显示导航栏
///
/// - Parameter bool: bool
func showNavigationBar(bool: Bool) {
    self.navigationView.isHidden = !bool
}

/// 返回按钮被点击,默认pop，需要时子类可重写 @objc修饰的方法子类也可重写
@objc func backButtonDidClicked(button:UIButton) {
    self.navigationController?.popViewController(animated: true)
}

/// 右侧按钮被点击 需要时子类可重写 @objc修饰的方法子类也可重写
///
/// - Parameter button: button description
@objc func rightButtonDidClicked(button:UIButton) {

}

2、基于UINavigationController构建导航控制器并添加Pop手势

创建控制器基于UINavigationController，准守UINavigationControllerDelegate与 UIGestureRecognizerDelegate协议，实现协议下对应的方法，在对应方法中对interactivePopGestureRecognizer的isEnabled进行控制以及是否响应手势，如下所示

override func viewDidLoad() {
    super.viewDidLoad()
    self.delegate = self
    if self.responds(to: #selector(getter: interactivePopGestureRecognizer)) {
        self.interactivePopGestureRecognizer?.delegate = self
    }
}

//MARK: UINavigationControllerDelegate
func navigationController(_ navigationController: UINavigationController, didShow viewController: UIViewController, animated: Bool) {
    // 在最底层的viewController是不能够响应pop手势的
    if self.responds(to: #selector(getter: interactivePopGestureRecognizer)) {
        if self.viewControllers.count == 1 {
            self.interactivePopGestureRecognizer?.isEnabled = false
        } else {
            self.interactivePopGestureRecognizer?.isEnabled = true
        }
    }
}
//MARK: UIGestureRecognizerDelegate
func gestureRecognizerShouldBegin(_ gestureRecognizer: UIGestureRecognizer) -> Bool {
    // 在最底层的viewController是不应该开始手势
    if self.viewControllers.count < 2 || self.visibleViewController == self.viewControllers[0] {
        return false
    }
    return true
}

3、基于UITabBarController构建主控制器

主要是实现对应的几个属性，对控制器进行基于JJNavigationViewController的包装，然后添加为子控制器，如下所示

override func viewDidLoad() {
    super.viewDidLoad()
    self.configUI()
}
// MARK: 私有方法

private func configUI() {
    //基于JJBaseViewController基础控制器构建4个控制器
    self.addChildViewController(viewController: JJHomeMainViewController.init(), title: "首页", image: "信息前", selectImage: "信息后")
    self.addChildViewController(viewController: JJFindViewController.init(), title: "发现", image: "发现前", selectImage: "发现后")
    self.addChildViewController(viewController: JJVideoViewController.init(), title: "美图", image: "信息前", selectImage: "信息后")
    self.addChildViewController(viewController: JJMeViewController.init(), title: "我的", image: "发现前", selectImage: "发现后")
}

/// 添加自控制器
///
/// - Parameters:
///   - viewController: viewController description
///   - title: title description
///   - image: image description
///   - selectImage: selectImage description
private func addChildViewController(viewController:UIViewController, title:NSString, image:NSString, selectImage:NSString){
    // 设置文字和图片
    viewController.tabBarItem.title = title as String
    viewController.tabBarItem.image = UIImage.init(named: image as String)
    viewController.tabBarItem.selectedImage = UIImage.init(named: selectImage as String)
    // 设置文字个状态下的属性
    let tabBar = viewController.tabBarItem!
    tabBar.setTitleTextAttributes([NSAttributedString.Key.foregroundColor:UIColor.gray], for: .normal)
    tabBar.setTitleTextAttributes([NSAttributedString.Key.foregroundColor:UIColor.colorWithHex(rgb: 0x16a5af, alpha: 1)], for: .selected)

    // 包装一个当行控制器
    let nav = JJNavigationViewController.init(rootViewController: viewController)
    nav.setNavigationBarHidden(true, animated: false)
    self.addChild(nav)
}

4、指定控制器可进行设备方向翻转

4.1 修改General配置

修改配置.png

4.2 AppDelegate中添加属性、实现方法

添加sAllowRotation属性用于标记，” func application(_ application: UIApplication, supportedInterfaceOrientationsFor window: UIWindow?) -> UIInterfaceOrientationMask
“方法中判断sAllowRotation的值，来改变UIInterfaceOrientationMask的值。默认情况下屏幕是不会自动旋转的

/// 是否允许屏幕旋转
var isAllowRotation:Bool = false

func application(_ application: UIApplication, supportedInterfaceOrientationsFor window: UIWindow?) -> UIInterfaceOrientationMask {
    if self.isAllowRotation == true {
        return UIInterfaceOrientationMask.allButUpsideDown
    } else {
        return UIInterfaceOrientationMask.portrait
    }
}

4.3 指定控制器实现屏幕的旋转

分别在对应控制器的viewDidAppear和viewDidDisappear方法中对AppDelegate的isAllowRotation属性进行修改。需要注意的是调用viewDidDisappear时，并且当前视图不是portrait，需要将设备的”orientation”属性修改为portrait，以便可旋转控制器不显示进入其他控制器时设备自动旋转为portrait

override func viewDidAppear(_ animated: Bool) {
    self.allowRotation()
}
override func viewDidDisappear(_ animated: Bool) {
    super.viewDidDisappear(animated)
    self.notAllowRotation()
}
/// 设配可翻转
private func allowRotation() {
    //设备是否可翻转
    let delegate = UIApplication.shared.delegate as? AppDelegate
    delegate?.isAllowRotation = true
}

/// 设备不可翻转
private func notAllowRotation() {
    //如果屏幕不是portrait就修改为portrait
    if UIDevice.current.orientation != .portrait {
        let tempNumber:NSNumber = NSNumber.init(value: Int8(UIDeviceOrientation.portrait.rawValue))
        UIDevice.current.setValue(tempNumber, forKey: "orientation")
    }
    let delegate = UIApplication.shared.delegate as? AppDelegate
    delegate?.isAllowRotation = false
}

项目地址：知识集结点

最近的文章

UICollectionViewFlowLayout之常用布局

涉及布局方式1、流式布局2、线性布局3、圆形布局4、卡片布局 具体布局实现1、流式布局 1.1 外部可访问的属性 创建布局类继承于UICollectionViewFlowLayout，在自定义布局类中提供一些常用的外部可访问属性，例如：是否垂直滚动、item的宽度和高度、列行间距等，方便进行布局 …

• 于 Swift 继续阅读
更早的文章

微信公众号的开发环境搭建与接入

开发环境的搭建1、进入Ngrok官网，下载客户端 2、选择需要下载的版本并解压 3、注册ngrok账号并登陆，在隧道管理页进行隧道的开通 4、 填写隧道信息 5、隧道连接 在开通隧道之后会产生一个隧道id，可以在终端中根据隧道id进行连接，当终端出现在线时，代表连接成功，这时其他人就可以通过 …

• 于 公众号开发 继续阅读