美文网首页iOS-swiftios 开发iOS 技术精选集
XCode10 swift4.2 适配遇到的坑

XCode10 swift4.2 适配遇到的坑

作者: Crazy凡 | 来源:发表于2018-09-18 19:17 被阅读814次

以下是2018年10月23日更新

经过大约一个月的时间的适配，项目正式使用XCode10(以下简称为10 or XC10)大部分库都升级为Swift4.2（以下简称为 4.2 or S4.2），下面是适配过程中遇到的一些坑。

1. Swift4、Swift4.2混编

如果你对项目是小的独立项目，完全可以全部升级为4.2，你可以略过第一条；如果你依赖了一些第三方的库，且没有升级4.2，你可以继续看这一条。目前测试的结果来看，Swift4 和 S4.2的混编没有什么大的问题，如果你是通过cocoapod引入的可以在Podfile中加入如下代码：

swift_41_pod_targets = ['your_target_name']
post_install do |installer|
  installer.pods_project.targets.each do |target|
    if swift_41_pod_targets.include?(target.name)
      target.build_configurations.each do |config|
        config.build_settings['SWIFT_VERSION'] = '4.1'
      end
    end
  end
end

2. NSDataAsset

升级XC10和S.2之前，项目里面有些对 'NSDataAsset' 的错误使用： 用‘NSDataAsset’读ImageAsset中的图片，这个是不正确的，但是却可以工作，这次升级修复了这个BUG。

正确的做法使用'DataAsset'，然后才可以用‘NSDataAsset’读取数据，我由于不够认真且经验不足还以为是个BUG，给Apple提了个BUG。。。[捂脸]

3. 第三方库的重命名 typealias

为了方便的适配S4.2对UIKit中的重命名，有些第三方使用typealias对一些类型进行了重命名，以 RxSwift 为例子，RxSwift中就有如下代码：

#if swift(>=4.2)
    public typealias UIControlEvents = UIControl.Event  private
#endif

这会导致一些重命名的类型即使不改也不会报错，但是一旦去掉了对某个库的依赖就会引入新的问题。

4.Delegate 的 Access Modifier

在升级S4.2过程中，XC偶尔会提示需要给某些Delegate方法添加 private修饰符，不要为了消除这个⚠️添加private，可能会导致Delegate永远不被调到；另外，如果是一个public或者open的class，协议方法记得也要加上public，否则会出一样的问题，具体原因我还在测试，但是现象是这样的，有新的见解欢迎评论区讨论。

5. 机型适配问题，iPhone XS Max字体变大

有些同事遇到XC9构建的安装包在iPhone XS Max上会有字体变大的情况，这个貌似是普遍现象，微信也有，使用XC10构建安装包可以解决这个问题，但是会遇到问题6

6. iOS9.3以下系统Crash率飙升

使用XC10构建安装包可以解决问题5，但是iOS9.3以下的系统Crash到让你怀疑人生

以下是2018年9月18日内容

AVAudioSession.sharedInstance().setCategory()

disappeared

Swift 4.2 中 iOS10以下不能用 AVAudioSession.sharedInstance() setCategory

可选方案:
  • 使用OC实现该部分，然后使用Swift调用
  • 放弃 iOS9用户体验

参考地址

do {
    if #available(iOS 11.0, *) {
        try audioSession.setCategory(.playback, mode: .default, policy: .longForm, options: [])
    } else if #available(iOS 10.0, *) {
        try audioSession.setCategory(.playback, mode: .default, options: [])
    } else {
        // Compiler error: 'setCategory' is unavailable in Swift
        try audioSession.setCategory(AVAudioSession.Category.playback)
    }
} catch let error {
    print("Unable to configure audio sesson category: \(error)")
}

NSUnderlineStyle(.patternSolid、.none)

disappeared

可选方案:
  • .none
 mutableAttributedString.addAttribute(NSAttributedString.Key.underlineStyle, value: NSUnderlineStyle.none.rawValue, range: range)
                                                                                                      ^~~~~ 'none' is unavailable: use [] to construct an empty option set

Wrong: mutableAttributedString.addAttribute(NSAttributedString.Key.underlineStyle, value: [], range: range)
Right: mutableAttributedString.addAttribute(NSAttributedString.Key.underlineStyle, value: 0, range: range)

  • 使用 CTUnderlineStyleModifiers

    // 没有测试
    NSUnderlineStyle.init(rawValue: Int(CTUnderlineStyleModifiers.patternSolid.rawValue))

  • 使用其他默认值

下面是Rename操作

UIKit

Swift4/UIKit

UITableViewCell

Swift 4 Swift 4.2
UITableViewCellStyle UITableViewCell.CellStyle

UIEvent

Swift 4 Swift 4.2
UIEventSubtype UIEvent.EventSubtype

UITableView

Swift 4 Swift 4.2
UITableViewScrollPosition UITableView.ScrollPosition
UITableViewAutomaticDimension UITableView.automaticDimension
UITableViewCellEditingStyle UITableViewCell.EditingStyle
UITableViewRowAnimation UITableView.RowAnimation
UITableViewStyle UITableView.Style
UITableViewCellAccessoryType UITableViewCell.AccessoryType

UIControl

Swift 4 Swift 4.2
UIControlEvents UIControl.Event

UIWindow

Swift 4 Swift 4.2
UIWindowLevelAlert UIWindow.Level.alert
UIKeyboardFrameEndUserInfoKey UIResponder.keyboardFrameEndUserInfoKey
UIKeyboardFrameBeginUserInfoKey UIResponder.keyboardFrameBeginUserInfoKey
UIKeyboardAnimationDurationUserInfoKey UIResponder.keyboardAnimationDurationUserInfoKey
UIKeyboardAnimationCurveUserInfoKey UIResponder.keyboardAnimationCurveUserInfoKey
UIKeyboardIsLocalUserInfoKey UIResponder.keyboardIsLocalUserInfoKey
UIWindowDidBecomeVisible UIWindow.didBecomeVisibleNotification
UIWindowDidBecomeHidden UIWindow.didBecomeHiddenNotification
UIWindowDidBecomeKey UIWindow.didBecomeKeyNotification
UIWindowDidResignKey UIWindow.didResignKeyNotification
UIKeyboardWillShow UIResponder.keyboardWillShowNotification
UIKeyboardDidShow UIResponder.keyboardDidShowNotification
UIKeyboardWillHide UIResponder.keyboardWillHideNotification
UIKeyboardDidHide UIResponder.keyboardDidHideNotification

UIViewController

Swift 4 Swift 4.2
open func addChildViewController(_ childController: UIViewController) open func addChild(_ childController: UIViewController)
open func willMove(toParentViewController parent: UIViewController?) open func willMove(toParent parent: UIViewController?)
open func didMove(toParentViewController parent: UIViewController?) open func didMove(toParent parent: UIViewController?)
open func removeFromParentViewController() open func removeFromParent()

UIActivity

Swift 4 Swift 4.2
UIActivityType UIActivity.ActivityType

UIActivityIndicatorView

Swift 4 Swift 4.2
activityIndicator.activityIndicatorViewStyle activityIndicator.style

UIAlertController

Swift 4 Swift 4.2
UIAlertActionStyle UIAlertAction.Style
UIAlertControllerStyle UIAlertController.Style

UIPageViewController

Swift 4 Swift 4.2
UIPageViewControllerNavigationDirection UIPageViewController.NavigationDirection
UIPageViewControllerSpineLocation UIPageViewController.SpineLocation
UIPageViewControllerNavigationOrientation UIPageViewController.NavigationOrientation
UIPageViewControllerTransitionStyle UIPageViewController.TransitionStyle
UIPageViewControllerOptionsKey UIPageViewController.OptionsKey

UINavigationController

Swift 4 Swift 4.2
UINavigationControllerOperation UINavigationController.Operation

UIGestureRecognizer

Swift 4 Swift 4.2
UIGestureRecognizerStatePossible UIGestureRecognizer.State.possible
UIGestureRecognizerStateBegan UIGestureRecognizer.State.began
UIGestureRecognizerStateChanged UIGestureRecognizer.State.changed
UIGestureRecognizerStateEnded UIGestureRecognizer.State.ended
UIGestureRecognizerStateCancelled UIGestureRecognizer.State.cancelled
UIGestureRecognizerStateFailed UIGestureRecognizer.State.failed
UIGestureRecognizerStateRecognized UIGestureRecognizer.State.recognized

NSLayoutFormat

Swift 4 Swift 4.2
NSLayoutFormatOptions NSLayoutConstraint.FormatOptions

UIEdgeInsets

Swift 4 Swift 4.2
public func UIEdgeInsetsMake(_ top: CGFloat, _ left: CGFloat, _ bottom: CGFloat, _ right: CGFloat) -> UIEdgeInsets UIEdgeInsets(top: CGFloat, left: CGFloat, bottom: CGFloat, right: CGFloat)
public func UIEdgeInsetsInsetRect(_ rect: CGRect, _ insets: UIEdgeInsets) -> CGRect public func inset(by insets: UIEdgeInsets) -> CGRect

UIFontDescriptor

Swift 4 Swift 4.2
UIFontDescriptorSymbolicTraits UIFontDescriptor.SymbolicTraits

UIImage

Swift 4 Swift 4.2
UIKIT_EXTERN NSData * __nullable UIImagePNGRepresentation(UIImage * __nonnull image); public func pngData() -> Data?
NSData * __nullable UIImageJPEGRepresentation(UIImage * __nonnull image, CGFloat compressionQuality); public func jpegData(compressionQuality: CGFloat) -> Data?

UIApplication

Swift 4 Swift 4.2
UIApplicationDidEnterBackground UIApplication.didEnterBackgroundNotification
UIApplicationWillEnterForeground UIApplication.willEnterForegroundNotification
UIApplicationDidFinishLaunching UIApplication.didFinishLaunchingNotification
UIApplicationDidBecomeActive UIApplication.didBecomeActiveNotification
UIApplicationWillResignActive UIApplication.willResignActiveNotification
UIApplicationDidReceiveMemoryWarning UIApplication.didReceiveMemoryWarningNotification
UIApplicationWillTerminate UIApplication.willTerminateNotification
UIApplicationSignificantTimeChange UIApplication.significantTimeChangeNotification
UIApplicationWillChangeStatusBarOrientation UIApplication.willChangeStatusBarOrientationNotification
UIApplicationDidChangeStatusBarOrientation UIApplication.didChangeStatusBarOrientationNotification
UIApplicationDidChangeStatusBarFrame UIApplication.didChangeStatusBarFrameNotification
UIApplicationBackgroundRefreshStatusDidChange UIApplication.backgroundRefreshStatusDidChangeNotification
UIApplicationProtectedDataWillBecomeUnavailable UIApplication.protectedDataWillBecomeUnavailableNotification
UIApplicationProtectedDataDidBecomeAvailable UIApplication.protectedDataDidBecomeAvailableNotification
UIApplicationUserDidTakeScreenshot UIApplication.userDidTakeScreenshotNotification
UIApplicationOpenSettingsURLString UIApplication.openSettingsURLString
UIApplicationLaunchOptionsKey UIApplication.LaunchOptionsKey
UIInterfaceOrientationIsLandscape() UIApplication.shared.statusBarOrientation.isLandscape

UIView

Swift 4 Swift 4.2
func bringSubview(toFront view: UIView) func bringSubviewToFront(_ view: UIView)
UIViewAnimationOptions UIView.AnimationOptions()

Foundation

NSAttributedString

Swift 4 Swift 4.2
NSAttributedStringKey NSAttributedString.Key

QuartzCore

CAShapeLayer

Swift 4 Swift 4.2
kCALineCapRound CAShapeLayerLineCap.round
kCALineCapButt CAShapeLayerLineCap.butt
kCALineCapSquare CAShapeLayerLineCap.square
kCALineJoinMiter CAShapeLayerLineJoin.miter
kCALineJoinRound CAShapeLayerLineJoin.round
kCALineJoinBevel CAShapeLayerLineJoin.bevel
kCAFillRuleNonZero CAShapeLayerFillRule.nonZero
kCAFillRuleEvenOdd CAShapeLayerFillRule.evenOdd

参考资料

Swift-Migration-4.2

相关文章

网友评论

    本文标题：XCode10 swift4.2 适配遇到的坑

    本文链接：https://www.haomeiwen.com/subject/ubpmnftx.html

    延伸阅读

    深度阅读

    • 您也可以注册成为美文阅读网的作者，发表您的原创作品、分享您的心情！

    栏目导航

    热点阅读

    iOS-swift

    ios 开发

    iOS 技术精选集

    iOS

    swift

    关于我们|服务条款|联系我们|XCode10 swift4.2 适配遇到的坑|投稿指南|网站地图|RSS订阅|排版工具|手机版

    提供经典美文摘抄,优美散文欣赏,现代诗歌精选,短篇小说,心情随笔,表白情书范文,故事会在线阅读欣赏

    Copyright © 2014-2023 Haomeiwen.com All Rights Reserved. 好美文阅读网 版权所有

    备案信息：桂公网安备 45052102000051号 · 桂ICP备13007215号-3

    本站所收录作品、热点评论等信息部分来源互联网，目的只是为了系统归纳学习和传递资讯

    所有作品版权归原创作者所有，与本站立场无关，如不慎侵犯了你的权益，请联系我们告知，我们将做删除处理！