iOS积累的零碎常用操作swift

绝地灬酷狼 2022-10-01 05:50 348阅读 0赞

记录一些iOS学习过程中的笔记

# iOS开发-零碎笔记 #

## 创建项目目录结构 ##

1.  AppDelegate.swift:生命周期及变量的定义
2.  ViewController.swift: MVC的C
3.  Assets.xcasset:放资源文件，如图片等
4.  info.plist：配置文件
5.  xxxTest: 单元测试
6.  Products:生成的文件
7.  Main.storyboard: 视图

## 快捷添加注释 ##

option + command + /
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## 关闭软键盘 ##

> 关闭代码

textField.resignFirstResponder()
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> 关闭方式1： 在Controller中重写touchesEnded()方法，然后在这里面关闭软件盘，意思是点击空白处关闭

override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {
        name.resignFirstResponder()
    }
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> 关闭方式2： 点击下一步时，关闭软键盘； Controller实现UITextFieldDelegate协议； 实现UITextFieldDelegate协议中的textFieldShouldReturn方法；

func textFieldShouldReturn(_ textField: UITextField) -> Bool {
        textField.resignFirstResponder()
        return true
    }
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## UIDatePicker选择时间后计算年龄 ##

func calAge(by datePicker: UIDatePicker) -> Int? {
        let gregorian = NSCalendar(calendarIdentifier: .gregorian)
        let now = Date()
        let components = gregorian?.components(NSCalendar.Unit.year, from: datePicker.date, to: now, options: NSCalendar.Options.init(rawValue: 0))
        return components?.year
    }
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## 页面跳转，传递数据 ##

有两个Controller：ViewController和GalleryViewController。从ViewController跳转到GalleryViewController。 ViewController重写方法：prepare，该方法在页面跳转时会被调用，我们需要在里面判断是跳转到哪个页面。

override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
            // 需要给Segue取名
            if segue.identifier == "GoToGallery" {
                let index = beautyPicker.selectedRow(inComponent: 0)
                var imageName: String?
                switch index {
                case 0:
                    imageName = "fangbingbing"
                case 1:
                    imageName = "libingbing"
                case 2:
                    imageName = "wangfei"
                case 3:
                    imageName = "yangmi"
                case 4:
                    imageName = "zhouxu"
                default:
                    imageName = nil
                }
    
                // 得到下一个页面的Controller
                let vc = segue.destination as! GalleryViewController
                vc.imageName = imageName
            }
        }
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## 通过图片文件名设置图片 ##

beautyImage.image = UIImage(named: imageName)
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## unwind segue关闭页面 ##

关闭页面后，Controller可以获得上个页面传回来的值 该方法写在前一个页面

@IBAction func closedPrePage(segue: UIStoryboardSegue) {
        print("closed")
    }
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## TableView下移一个状态栏的高度解决 ##

1.  方法一

if #available(iOS 11.0, *) {
        tableView.contentInsetAdjustmentBehavior = .never
    }
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1.  方法二，内容上部分区域向上偏移一个状态栏的高度

collectionView?.contentInset.top = -UIApplication.shared.statusBarFrame.height
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## TableView 添加刷新 ##

let refreshControl = UIRefreshControl()
    
    // 初始化刷新
    refreshControl.backgroundColor = UIColor.blue //设置刷新的背景颜色
    refreshControl.attributedTitle = NSAttributedString(string: "刷新一下：\(Data())", attributes: [NSAttributedStringKey.foregroundColor: UIColor.white]) // 设置字体颜色
    refreshControl.tintColor = UIColor.green // 加载菊花颜色
    refreshControl.tintAdjustmentMode = .dimmed // 色彩调整模式
    refreshControl.addTarget(self, action: #selector(addcount), for: .valueChanged) //添加方法目标
    
    // 添加该刷新
    tableView.refreshControl = refreshControl
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刷新方法

@objc func addcount() {
        dataArrary.append(contentsOf: dataArrary)
        tableView.reloadData()
        refreshControl.endRefreshing()
    }
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## 向项目添加字体 ##

[developer.apple.com/documentati…][developer.apple.com_documentati]

由于iOS的用的字体名称并不是文件名称，而是字体本身名称。 下面代码搜索所有字体，然后我们在控制台，找到多出来的名称。

for family: String in UIFont.familyNames
    {
        print("\(family)")
        for names: String in UIFont.fontNames(forFamilyName: family)
        {
            print("== \(names)")
        }
    }
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## 设置tabbar 字体和字体大小 ##

override func viewDidLoad() {
        super.viewDidLoad()
        let appearance = UITabBarItem.appearance()
        appearance.setTitleTextAttributes([NSAttributedStringKey.font: UIFont(name: "Ubuntu-Light", size: 9)!], for: .normal)
    }
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## UIButton 相关 ##

### UIButton`.isEnabled = false`后图片按钮的背景图片被改变 ###

UIButton.adjustsImageWhenDisabled = false
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### 扩展添加圆角、边框、边框颜色 ###

@IBDesignable extension UIButton {
    
        @IBInspectable var borderWidth: CGFloat {
            set {
                layer.borderWidth = newValue
            }
            get {
                return layer.borderWidth
            }
        }
    
        @IBInspectable var cornerRadius: CGFloat {
            set {
                layer.cornerRadius = newValue
            }
            get {
                return layer.cornerRadius
            }
        }
    
        @IBInspectable var borderColor: UIColor? {
            set {
                guard let uiColor = newValue else { return }
                layer.borderColor = uiColor.cgColor
            }
            get {
                guard let color = layer.borderColor else { return nil }
                return UIColor(cgColor: color)
            }
        }
    }
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### 扩展图片在上，文字在下 ###

extension UIButton {
        func alignVertical(spacing: CGFloat = 6.0, imageBottom: CGFloat = 0.0) {
            guard let imageSize = self.imageView?.image?.size,
                let text = self.titleLabel?.text,
                let font = self.titleLabel?.font
                else { return }
            self.titleEdgeInsets = UIEdgeInsets(top: 0.0, left: -imageSize.width, bottom: -(imageSize.height + spacing), right: 0.0)
            let labelString = NSString(string: text)
            let titleSize = labelString.size(withAttributes: [NSAttributedStringKey.font: font])
            self.imageEdgeInsets = UIEdgeInsets(top: -(titleSize.height + spacing), left: 0.0, bottom: imageBottom, right: -titleSize.width)
            let edgeOffset = abs(titleSize.height - imageSize.height) / 2.0;
            self.contentEdgeInsets = UIEdgeInsets(top: edgeOffset, left: 0.0, bottom: edgeOffset, right: 0.0)
        }
    }
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## UITableView或UICollectionView被TabBar遮盖 ##

## UITableView调用`reloadData`导致移动到列表顶部失效 ##

UIView.animate(withDuration: 0, animations: {
        self.tableView.contentOffset = CGPoint.zero
    }, completion: { _ in
        self.tableView.reloadData()
    })
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## NavigationBar导致CollectionViewCell或TableViewCell偏移 ##

self.collectionView?.contentInsetAdjustmentBehavior = .automatic
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## 获取app版本 ##

/// 获取版本名
    let appVersion = Bundle.main.infoDictionary!["CFBundleShortVersionString"] as? String
    
    /// 获取版本号
    let versionNumber = Bundle.main.infoDictionary!["CFBundleVersion"] as? String
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## 清理缓存 ##

func clearCache() {
    
         // 取出cache文件夹目录 缓存文件都在这个目录下
         let cachePath = NSSearchPathForDirectoriesInDomains(FileManager.SearchPathDirectory.cachesDirectory, FileManager.SearchPathDomainMask.userDomainMask, true).first
    
         // 取出文件夹下所有文件数组
         let fileArr = FileManager.default.subpaths(atPath: cachePath!)
    
         // 遍历删除
         for file in fileArr! {
    
             let path = cachePath?.appendingFormat("/\(file)")
             if FileManager.default.fileExists(atPath: path!) {
    
                 do {
                     try FileManager.default.removeItem(atPath: path!)
                 } catch {
    
                 }
             }
         }
     }
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## 打开网页本软件的appstore ##

// App Store URL.
    let appStoreLink = "https://itunes.apple.com/cn/app/id1144351773?mt=8"
    
    /* First create a URL, then check whether there is an installed app that can open it on the device. */
    if let url = URL(string: appStoreLink), UIApplication.shared.canOpenURL(url) {
        // Attempt to open the URL.
        UIApplication.shared.open(url, options: [:], completionHandler: {(success: Bool) in
            if success {
                print("Launching \(url) was successful")
            }})
    }
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## 设置圆形展示图像 ##

1.  设置`UIImageView`宽度和高度，假如设置为60\*60
2.  设置运行时属性，设置圆弧为30（正方形边长度一半）
3.  勾选`Clip to Bounds`，

## UIScrollView填充到顶部（去掉状态栏到空白间距） ##

1.  `Content Insets` 选择`Never`
2.  去掉选中的`Safe Area Relative Margins`

## UIImage 高斯模糊扩展 ##

extension UIImage {
        func blurred(radius: CGFloat) -> UIImage {
            let ciContext = CIContext(options: nil)
            guard let cgImage = cgImage else { return self }
            let inputImage = CIImage(cgImage: cgImage)
            guard let ciFilter = CIFilter(name: "CIGaussianBlur") else { return self }
            ciFilter.setValue(inputImage, forKey: kCIInputImageKey)
            ciFilter.setValue(radius, forKey: "inputRadius")
            guard let resultImage = ciFilter.value(forKey: kCIOutputImageKey) as? CIImage else { return self }
            guard let cgImage2 = ciContext.createCGImage(resultImage, from: inputImage.extent) else { return self }
            return UIImage(cgImage: cgImage2)
        }
    }
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## 两个UIImage 合并扩展 ##

extension UIImage {
    
      func overlayWith(image: UIImage, posX: CGFloat, posY: CGFloat) -> UIImage {
        let newWidth = size.width < posX + image.size.width ? posX + image.size.width : size.width
        let newHeight = size.height < posY + image.size.height ? posY + image.size.height : size.height
        let newSize = CGSize(width: newWidth, height: newHeight)
    
        UIGraphicsBeginImageContextWithOptions(newSize, false, 0.0)
        draw(in: CGRect(origin: CGPoint.zero, size: size))
        image.draw(in: CGRect(origin: CGPoint(x: posX, y: posY), size: image.size))
        let newImage = UIGraphicsGetImageFromCurrentImageContext()!
        UIGraphicsEndImageContext()
    
        return newImage
      }
    
    }
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## SDWebImageView 下载图片 ##

1.  方式一

img.sd_setImage(with: URL(string: "http://url"),
      placeholderImage: #imageLiteral(resourceName: "default_square")) { image, error, cacheType, url in
    
    }
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1.  方式二

SDWebImageDownloader
      .shared()
      .downloadImage(with: URL(string: "http://url"),
        options: SDWebImageDownloaderOptions.init(rawValue: 0),
        progress: nil,
        completed: { image, data, error, finished in
        if finished {
    
        }
    })
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## AVPlayerViewController 视频播放 ##

import AVKit
    func playVideoByUrl(string: String) {
        let videoURL = URL(string: string)
        let player = AVPlayer(url: videoURL!)
        let playerViewController = AVPlayerViewController()
        playerViewController.player = player
        self.present(playerViewController, animated: true) {
            playerViewController.player!.play()
        }
    }
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## 为UIImageView添加的点击手势无效 ##

1.  勾选上`User Interaction Enabled`
2.  代码中设置`uiimageview.userInteractionEnabled = true`

## PHAsset获取文件路径 ##

extension PHAsset {
    
        func getURL(completionHandler : @escaping ((_ responseURL : URL?) -> Void)){
            if self.mediaType == .image {
                let options: PHContentEditingInputRequestOptions = PHContentEditingInputRequestOptions()
                options.canHandleAdjustmentData = {(adjustmeta: PHAdjustmentData) -> Bool in
                    return true
                }
                self.requestContentEditingInput(with: options, completionHandler: {(contentEditingInput: PHContentEditingInput?, info: [AnyHashable : Any]) -> Void in
                    completionHandler(contentEditingInput!.fullSizeImageURL as URL?)
                })
            } else if self.mediaType == .video {
                let options: PHVideoRequestOptions = PHVideoRequestOptions()
                options.version = .original
                PHImageManager.default().requestAVAsset(forVideo: self, options: options, resultHandler: {(asset: AVAsset?, audioMix: AVAudioMix?, info: [AnyHashable : Any]?) -> Void in
                    if let urlAsset = asset as? AVURLAsset {
                        let localVideoUrl: URL = urlAsset.url as URL
                        completionHandler(localVideoUrl)
                    } else {
                        completionHandler(nil)
                    }
                })
            }
        }
    }
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## UIView 相关 ##

### 通过UIView获取父UIViewController ###

extension UIView {
        var parentViewController: UIViewController? {
            var parentResponder: UIResponder? = self
            while parentResponder != nil {
                parentResponder = parentResponder!.next
                if let viewController = parentResponder as? UIViewController {
                    return viewController
                }
            }
            return nil
        }
    }
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## String 相关 ##

### html的字符串，将代码转成对应效果 ###

extension String {
        var htmlToAttributedString: NSAttributedString? {
            guard let data = data(using: .utf8) else { return NSAttributedString() }
            do {
                return try NSAttributedString(data: data, options: [.documentType: NSAttributedString.DocumentType.html, .characterEncoding:String.Encoding.utf8.rawValue], documentAttributes: nil)
            } catch {
                return NSAttributedString()
            }
        }
        var htmlToString: String {
            return htmlToAttributedString?.string ?? ""
        }
    }
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### 正则表达式匹配 ###

/// 正则表达式匹配
    extension String {
        func matchingStrings(regex: String) -> [String] {
            do {
                let regex = try NSRegularExpression(pattern: regex)
                let results = regex.matches(in: self,
                                            range: NSRange(self.startIndex..., in: self))
                return results.map {
                    String(self[Range($0.range, in: self)!])
                }
            } catch let error {
                print("invalid regex: \(error.localizedDescription)")
                return []
            }
        }
    }
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## Data拼接数据 ##

extension Data {
        mutating func append(_ string: String, using encoding: String.Encoding = .utf8) {
            if let data = string.data(using: encoding) {
                append(data)
            }
        }
    }
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## 打乱数组顺序 ##

extension Array{
        mutating func randamArray() {
            var list = self
            for index in 0..<list.count {
                let newIndex = Int(arc4random_uniform(UInt32(list.count-index))) + index
                if index != newIndex {
                    list.swapAt(index, newIndex)
                }
            }
            self = list
        }
    }
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## UIImage相关 ##

### 高斯模糊图片 ###

### 两张图片叠加成一张图片 ###

extension UIImage {
    
        func overlayWith(image: UIImage, posX: CGFloat, posY: CGFloat) -> UIImage {
            let newWidth = size.width < posX + image.size.width ? posX + image.size.width : size.width
            let newHeight = size.height < posY + image.size.height ? posY + image.size.height : size.height
            let newSize = CGSize(width: newWidth, height: newHeight)
    
            UIGraphicsBeginImageContextWithOptions(newSize, false, 0.0)
            draw(in: CGRect(origin: CGPoint.zero, size: size))
            image.draw(in: CGRect(origin: CGPoint(x: posX, y: posY), size: image.size))
            let newImage = UIGraphicsGetImageFromCurrentImageContext()!
            UIGraphicsEndImageContext()
    
            return newImage
        }
    
    }
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### 缩放图片 ###

extension UIImage {
    
        func scaled(withSize size: CGSize) -> UIImage {
            UIGraphicsBeginImageContextWithOptions(size, false, 0.0)
            defer { UIGraphicsEndImageContext() }
            draw(in: CGRect(x: 0.0, y: 0.0, width: size.width, height: size.height))
            return UIGraphicsGetImageFromCurrentImageContext()!
        }
    
    }
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## Json相关 ##

### Json编码 ###

extension JSONEncoder {
    
        /// 将实体类转换成Json数据
        func toJson<T: Encodable>(_ entity: T) -> String? {
            guard let encodedData = try? encode(entity) else {
                return nil
            }
            return String(data: encodedData, encoding: .utf8)
        }
    }
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### Json解码 ###

extension JSONDecoder {
        func from<T: Decodable>(_ type: T.Type, json: String) -> T? {
            do {
                return try decode(type, from: json.data(using: .utf8)!)
            }
            catch {
                return nil
            }
        }
    }
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## 请求字段编码为字符串，形式如：key=value&key=value&key=value ##

extension Dictionary {
        func percentEscaped() -> String {
            return map { (key, value) in
                let escapedKey = "\(key)".addingPercentEncoding(withAllowedCharacters: .urlQueryValueAllowed) ?? ""
                let escapedValue = "\(value)".addingPercentEncoding(withAllowedCharacters: .urlQueryValueAllowed) ?? ""
                return escapedKey + "=" + escapedValue
                }
                .joined(separator: "&")
        }
    }
    
    extension CharacterSet {
        static let urlQueryValueAllowed: CharacterSet = {
            let generalDelimitersToEncode = ":#[]@" // does not include "?" or "/" due to RFC 3986 - Section 3.4
            let subDelimitersToEncode = "!$&'()*+,;="
    
            var allowed = CharacterSet.urlQueryAllowed
            allowed.remove(charactersIn: "\(generalDelimitersToEncode)\(subDelimitersToEncode)")
            return allowed
        }()
    }
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## UIViewController 相关 ##

### 添加子UIViewController ###

extension UIViewController {
    
        /// 添加子ViewController
        func addSubController(child: UIViewController, to: UIView? = nil) {
            addChildViewController(child)
            if let to = to {
                child.view.frame = to.frame
                to.addSubview(child.view)
            }
            else {
                child.view.frame = view.frame
                view.addSubview(child.view)
            }
            child.didMove(toParentViewController: self)
        }
    }
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### 移除子UIViewController ###

extension UIViewController {
        /// 移除子ViewController
        func removeSubController(child: UIViewController) {
            child.willMove(toParentViewController: nil)
            child.removeFromParentViewController()
            child.view.removeFromSuperview()
        }
    }
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### 关闭页面 ###

#### 关闭当前页面 ####

extension UIViewController {
        /// 关闭当前页面
        func closePage() {
            self.dismiss(animated: true, completion: nil)
        }
    }
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#### 关闭所有页面，除开最下级的那个页面 ####

extension UIViewController {
        func closeAllPage() {
            //获取根VC
            var rootVC = self.presentingViewController
            while let parent = rootVC?.presentingViewController {
                rootVC = parent
            }
            //释放所有下级视图
            rootVC?.dismiss(animated: true, completion: nil)
        }
    }
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### 显示和关闭菊花等待加载 ###

extension UIViewController {
        class func displaySpinner(onView : UIView) -> UIView {
            let spinnerView = UIView.init(frame: onView.bounds)
            spinnerView.backgroundColor = UIColor.init(red: 0.5, green: 0.5, blue: 0.5, alpha: 0.5)
            let ai = UIActivityIndicatorView.init(activityIndicatorStyle: .whiteLarge)
            ai.startAnimating()
            ai.center = spinnerView.center
    
            DispatchQueue.main.async {
                spinnerView.addSubview(ai)
                onView.addSubview(spinnerView)
            }
    
            return spinnerView
        }
    
        class func removeSpinner(spinner :UIView) {
            DispatchQueue.main.async {
                spinner.removeFromSuperview()
            }
        }
    }
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> 显示

let sp = UIViewController.displaySpinner(onView: self.view)
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> 关闭

UIViewController.removeSpinner(spinner: sp)
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## IAP 内购 ##

> 使用

1.  除代码外的内购准备工序已OK
2.  获取产品数据：通过`IAPHelper.shared.fetchAvailableProducts`从苹果服务器获取所有传入的产品id的产品信息，传入的参数是产品的id字符串数组
3.  支付：`IAPHelper.shared.purchase(id: id)`，id是产品id

IAPHelper.shared.purchase(id: selectItem!.product_id) {alert, product, transaction in
      if alert == .purchased { //购买成功
          if let receiptUrl = Bundle.main.appStoreReceiptURL, let receiptData = NSData(contentsOf: receiptUrl) {
              let receiptString = receiptData.base64EncodedString(options: NSData.Base64EncodingOptions(rawValue: 0))
              // 对receiptString加密字符串进行验证
          }
      }
      else if alert == .restored {
    
      }
      else if alert == .purchasing {
    
      }
      else {
    
      }
    }
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> IAPHelper 代码

import StoreKit
    
    enum IAPHelperAlertType{
        case disabled
        case restored
        case purchased
        case purchasing
        case setProductIds
    
        func message() -> String{
            switch self {
            case .setProductIds: return "未设置产品id，请调用 fetchAvailableProducts()"
            case .disabled: return "购买已取消"
            case .restored: return "您已成功恢复购买"
            case .purchased: return "您已成功购买此商品"
            case .purchasing: return "正在购买..."
            }
        }
    }
    
    
    class IAPHelper: NSObject {
        static let shared = IAPHelper()
    
        private override init() { }
    
        fileprivate var productID = ""
        fileprivate var productsRequest = SKProductsRequest()
        fileprivate var productDict = [String:SKProduct]()
        fileprivate var fetchProductCompletion: (([SKProduct])->Void)?
    
        fileprivate var productToPurchase: SKProduct?
        var purchaseProductCompletion: ((IAPHelperAlertType, SKProduct?, SKPaymentTransaction?) -> Void)?
    
        // MARK: - 购买产品
        func canMakePurchases() -> Bool {  return SKPaymentQueue.canMakePayments()  }
    
        func purchase(id: String, completion: @escaping ((IAPHelperAlertType, SKProduct?, SKPaymentTransaction?)->Void)) {
            self.purchaseProductCompletion = completion
            self.productToPurchase = productDict[id]
    
            guard let product = self.productToPurchase else {
                print(IAPHelperAlertType.setProductIds.message())
                fatalError(IAPHelperAlertType.setProductIds.message())
            }
    
            if self.canMakePurchases() {
                let payment = SKPayment(product: product)
                SKPaymentQueue.default().add(self)
                SKPaymentQueue.default().add(payment)
    
                print("采购产品: \(product.productIdentifier)")
                productID = product.productIdentifier
            }
            else {
                completion(.disabled, nil, nil)
            }
        }
    
        // MARK: - 恢复购买
        func restorePurchase(){
            SKPaymentQueue.default().add(self)
            SKPaymentQueue.default().restoreCompletedTransactions()
        }
    
        // MARK: - 获取可用的iap产品
        func fetchAvailableProducts(by ids: [String], completion: @escaping (([SKProduct])->Void)){
            self.fetchProductCompletion = completion
            // 把您的IAP产品id放到这里面
    
            guard !ids.isEmpty else {
                print("没有设置产品id")
                fatalError(IAPHelperAlertType.setProductIds.message())
            }
    
            productsRequest = SKProductsRequest(productIdentifiers: Set(ids))
            productsRequest.delegate = self
            productsRequest.start()
        }
    
    }
    
    extension IAPHelper: SKProductsRequestDelegate, SKPaymentTransactionObserver{
        // MARK: - 请求IAP产品
        func productsRequest (_ request:SKProductsRequest, didReceive response:SKProductsResponse) {
    
            if (response.products.count > 0) {
                for product in response.products {
                    print("product.productIdentifier = \(product.productIdentifier)")
                    self.productDict[product.productIdentifier] = product
                }
                self.fetchProductCompletion?(response.products)
            }
        }
    
        func paymentQueueRestoreCompletedTransactionsFinished(_ queue: SKPaymentQueue) {
            self.purchaseProductCompletion?(.restored, nil, nil)
        }
    
        // MARK:- IAP付款队列
        func paymentQueue(_ queue: SKPaymentQueue, updatedTransactions transactions: [SKPaymentTransaction]) {
            print("调用了几次啊！！！")
            for transaction:AnyObject in transactions {
                if let trans = transaction as? SKPaymentTransaction {
                    switch trans.transactionState {
                    case .purchased:
                        print("产品已购买")
                        SKPaymentQueue.default().finishTransaction(transaction as! SKPaymentTransaction)
                        self.purchaseProductCompletion?(.purchased, self.productToPurchase, trans)
                        break
    
                    case .failed:
                        print("产品购买失败\(trans.error.debugDescription)")
                        SKPaymentQueue.default().finishTransaction(transaction as! SKPaymentTransaction)
                        self.purchaseProductCompletion?(.disabled, self.productToPurchase, trans)
                        break
                    case .purchasing:
                        print("正在购买...")
                        self.purchaseProductCompletion?(.purchasing, self.productToPurchase, trans)
                        break
                    case .restored:
                        print("产品已恢复购买")
                        SKPaymentQueue.default().finishTransaction(transaction as! SKPaymentTransaction)
                        self.purchaseProductCompletion?(.restored, self.productToPurchase, trans)
                        break
    
                    default: break
                    }
                }
            }
        }
    }
    复制代码

转载于:https://juejin.im/post/5c90f6adf265da610a56e43b

[developer.apple.com_documentati]: https://link.juejin.im?target=https%3A%2F%2Fdeveloper.apple.com%2Fdocumentation%2Fuikit%2Ftext_display_and_fonts%2Fadding_a_custom_font_to_your_app