Device 是轻量级工具，检测当前的设备和屏幕尺寸。
设备版本使用示例：
func myFunc() {
/*** Display the device version ***/
switch Device.version() {
/*** iPhone ***/
case .iPhone4: print("It's an iPhone 4")
case .iPhone4S: print("It's an iPhone 4S")
case .iPhone5: print("It's an iPhone 5")
case .iPhone5C: print("It's an iPhone 5C")
case .iPhone5S: print("It's an iPhone 5S")
case .iPhone6: print("It's an iPhone 6")
case .iPhone6S: print("It's an iPhone 6S")
case .iPhone6Plus: print("It's an iPhone 6 Plus")
case .iPhone6PlusS: print("It's an iPhone 6 Plus S")
/*** iPad ***/
case .iPad1: print("It's an iPad 1")
case .iPad2: print("It's an iPad 2")
case .iPad3: print("It's an iPad 3")
case .iPad4: print("It's an iPad 4")
case .iPadAir: print("It's an iPad Air")
case .iPadAir2: print("It's an iPad Air 2")
case .iPadMini: print("It's an iPad Mini")
case .iPadMini2: print("It's an iPad Mini 2")
case .iPadMini3: print("It's an iPad Mini 3")
case .iPadMini4: print("It's an iPad Mini 4")
case .iPadPro: print("It's an iPad Pro")
/*** iPod ***/
case .iPodTouch1Gen: print("It's a iPod touch generation 1")
case .iPodTouch2Gen: print("It's a iPod touch generation 2")
case .iPodTouch3Gen: print("It's a iPod touch generation 3")
case .iPodTouch4Gen: print("It's a iPod touch generation 4")
case .iPodTouch5Gen: print("It's a iPod touch generation 5")
case .iPodTouch6Gen: print("It's a iPod touch generation 6")
/*** Simulator ***/
case .Simulator: print("It's a Simulator")
/*** Unknown ***/
default: print("It's an unknown device")
}
}
屏幕版本示例：
func myFucn() {
/*** Display the device screen size ***/
switch Device.size() {
case .Screen3_5Inch: print("It's a 3.5 inch screen")
case .Screen4Inch: print("It's a 4 inch screen")
case .Screen4_7Inch: print("It's a 4.7 inch screen")
case .Screen5_5Inch: print("It's a 5.5 inch screen")
default: print("Unknown size")
}
}
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