【发布时间】：2018-10-11 10:15:48
【问题描述】：
通常，我想针对不同的设备测试我的 iOS 应用程序。由于我没有钱购买所有设备，所以我使用模拟器这样做:)
通常，对于 Apple 产品的不同外形尺寸，代码看起来会略有不同。因此，我想出了以下开关案例（见下文...）以编程方式区分设备。
switch-case 非常适合实际的硬件设备 - 但它仍然是使用模拟器的糟糕解决方案。
模拟器是它自己的设备！如果我更改为具有不同外形的模拟器目标，我需要在每个 switch-case 中取消注释/注释！
是否有更好的解决方案以编程方式更好地处理模拟器及其外形？
switch UIDevice.current.modelName {
// Here there is still the need to uncomment/comment the Devices.Simulator
// for any new form-factor that is being simulated....
// as an example: If simulating an iPhone-8S then the Devices.Simulator needs to be uncommented in the according switch-case...
case Devices.IPhone5, Devices.IPhone5S, Devices.IPhone5C: //, Devices.Simulator:
print("do whatever...")
case Devices.IPhone6, Devices.IPhone6S, Devices.IPhone7, Devices.IPhone8: //, Devices.Simulator:
print("do whatever...")
case Devices.IPhone6Plus, Devices.IPhone6SPlus, Devices.IPhone7Plus, Devices.IPhone8Plus, Devices.Simulator:
print("do whatever...")
case Devices.IPhoneX: //, Devices.Simulator:
print("do whatever...")
default:
print("do whatever...")
}
当然，在您的代码库中的某处有以下内容：
public enum Devices: String {
case IPodTouch5
case IPodTouch6
case IPhone4
case IPhone4S
case IPhone5
case IPhone5C
case IPhone5S
case IPhone6
case IPhone6Plus
case IPhone6S
case IPhone6SPlus
case IPhone7
case IPhone7Plus
case IPhoneSE
case IPhone8
case IPhone8Plus
case IPhoneX
case IPad2
case IPad3
case IPad4
case IPad5
case IPadAir
case IPadAir2
case IPadMini
case IPadMini2
case IPadMini3
case IPadMini4
case IPadPro_9_7
case IPadPro_12_9
case IPadPro_12_9_2ndGen
case IPadPro_10_5
case AppleTV_5_3
case AppleTV_6_2
case HomePod
case Simulator
case Other
}
还有……
public extension UIDevice {
public var modelName: Devices {
var systemInfo = utsname()
uname(&systemInfo)
let machineMirror = Mirror(reflecting: systemInfo.machine)
let identifier = machineMirror.children.reduce("") { identifier, element in
guard let value = element.value as? Int8 , value != 0 else { return identifier }
return identifier + String(UnicodeScalar(UInt8(value)))
}
switch identifier {
case "iPod5,1": return Devices.IPodTouch5
case "iPod7,1": return Devices.IPodTouch6
case "iPhone3,1", "iPhone3,2", "iPhone3,3": return Devices.IPhone4
case "iPhone4,1": return Devices.IPhone4S
case "iPhone5,1", "iPhone5,2": return Devices.IPhone5
case "iPhone5,3", "iPhone5,4": return Devices.IPhone5C
case "iPhone6,1", "iPhone6,2": return Devices.IPhone5S
case "iPhone7,2": return Devices.IPhone6
case "iPhone7,1": return Devices.IPhone6Plus
case "iPhone8,1": return Devices.IPhone6S
case "iPhone8,2": return Devices.IPhone6SPlus
case "iPhone9,1", "iPhone9,3": return Devices.IPhone7
case "iPhone9,2", "iPhone9,4": return Devices.IPhone7Plus
case "iPhone8,4": return Devices.IPhoneSE
case "iPhone10,1", "iPhone10,4": return Devices.IPhone8
case "iPhone10,2", "iPhone10,5": return Devices.IPhone8Plus
case "iPhone10,3", "iPhone10,6": return Devices.IPhoneX
case "iPad2,1", "iPad2,2", "iPad2,3", "iPad2,4":return Devices.IPad2
case "iPad3,1", "iPad3,2", "iPad3,3": return Devices.IPad3
case "iPad3,4", "iPad3,5", "iPad3,6": return Devices.IPad4
case "iPad4,1", "iPad4,2", "iPad4,3": return Devices.IPadAir
case "iPad5,3", "iPad5,4": return Devices.IPadAir2
case "iPad6,11", "iPad6,12": return Devices.IPad5
case "iPad2,5", "iPad2,6", "iPad2,7": return Devices.IPadMini
case "iPad4,4", "iPad4,5", "iPad4,6": return Devices.IPadMini2
case "iPad4,7", "iPad4,8", "iPad4,9": return Devices.IPadMini3
case "iPad5,1", "iPad5,2": return Devices.IPadMini4
case "iPad6,3", "iPad6,4": return Devices.IPadPro_9_7
case "iPad6,7", "iPad6,8": return Devices.IPadPro_12_9
case "iPad7,1", "iPad7,2": return Devices.IPadPro_12_9_2ndGen
case "iPad7,3", "iPad7,4": return Devices.IPadPro_10_5
case "AppleTV5,3": return Devices.AppleTV_5_3
case "AppleTV6,2": return Devices.AppleTV_6_2
case "AudioAccessory1,1": return Devices.HomePod
case "i386", "x86_64": return Devices.Simulator
default: return Devices.Other
}
}
}
【问题讨论】：
-
这取决于您要达到的目标。 Apple 定义尺寸类以管理布局问题：bignerdranch.com/blog/designing-for-size-classes-in-ios
-
请注意，您可以在模拟器中运行时检索（模拟的）iPhone模型：stackoverflow.com/a/30075200/1187415。
-
大多数情况下，我想区分 iPhoneSE 大小的设备和 iPhone6/7/8 大小的设备。如果您向我展示了如何使用 size-classes 来解决这个问题，那么我很高兴不再自己在代码中手动执行它！ （......但直到今天，我还没有看到区分这两种外形尺寸的解决方案 [i.s. iPhoneSE 与 iPhone6/7/8]）！！
-
你为什么要区分它们呢？你还没有提到你想要达到的目标。
-
它没有，它们在纵向上都很紧凑，但你应该设计一个可以在两者之间适应的布局，这就是 AutoLayout 的重点。有时您必须做出妥协（这应该与每个用户的数量有关），这是完全正常的。你的方法很糟糕，它不是一个开始的未来证明，但它也是不必要的和过度设计的。
标签： swift xcode model device simulator