根据设备更改字体大小
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【中文标题】根据设备更改字体大小【英文标题】：Change font size base on device 【发布时间】：2020-08-21 07:22:03 【问题描述】：有什么方法可以了解用户正在使用哪种类型的设备。
我想用它来改变 iPhone8 的字体大小，如果 device == "iPhone8" use Textfontsize 20 else use 10
非常感谢
【问题讨论】：
【参考方案1】：达米亚诺，
根据设备更改字体大小不是一个好计划，当 Apple 推出新设备时会发生什么。使用辅助功能并希望使字体更大的用户会做什么？也许你有一个用户想要小字体，因为他使用的是双屏模式的 12 英寸 iPad。
使用动态字体，让用户选择他们喜欢的大小:) 这是从一篇关于同一主题的文章中剪下的。
https://www.hackingwithswift.com/quick-start/swiftui/how-to-use-dynamic-type-with-a-custom-font
@available(ios 13, macCatalyst 13, tvOS 13, watchOS 6, *)
struct ScaledFont: ViewModifier
@Environment(\.sizeCategory) var sizeCategory
var name: String
var size: CGFloat
func body(content: Content) -> some View
let scaledSize = UIFontMetrics.default.scaledValue(for: size)
return content.font(.custom(name, size: scaledSize))
@available(iOS 13, macCatalyst 13, tvOS 13, watchOS 6, *)
extension View
func scaledFont(name: String, size: CGFloat) -> some View
return self.modifier(ScaledFont(name: name, size: size))
struct ContentView: View
var body: some View
List
Text("Hello World")
Text("Hello World")
.scaledFont(name: "Georgia", size: 12)
【讨论】：
【参考方案2】：如果您想为不同的 iPhone 型号处理不同的字体大小。您必须为此创建自定义类。
import Foundation
import UIKit
// for label
class ClassLabelSizeClass: UILabel
override func awakeFromNib()
super.awakeFromNib()
switch UIDevice().type
case .iPhoneSE, .iPhone5, .iPhone5S, .iPhone5C:
self.font = self.font.withSize(?*self.font.pointSize)
case .iPhone6, .iPhone6S, .iPhone7, .iPhone8:
self.font = self.font.withSize(?*self.font.pointSize + 2)
case .iPhone6plus, .iPhone6Splus, .iPhone7plus, .iPhone8plus:
self.font = self.font.withSize(?*self.font.pointSize + 2)
case .iPhoneX, .iPhoneXR, .iPhoneXS, .iPhoneXSMax, .iPhone11, .iPhone11Pro, .iPhone11ProMax:
self.font = self.font.withSize(?*self.font.pointSize + 3)
default:
self.font = self.font.withSize(?*self.font.pointSize + 4)
//for textfield
class ClassTextFieldSizeClass: UITextField
override func awakeFromNib()
super.awakeFromNib()
switch UIDevice().type
case .iPhoneSE, .iPhone5, .iPhone5S, .iPhone5C:
self.font = self.font?.withSize(?*self.font?.pointSize)
case .iPhone6, .iPhone6S, .iPhone7, .iPhone8:
self.font = self.font?.withSize(?*self.font?.pointSize + 2)
case .iPhone6plus, .iPhone6Splus, .iPhone7plus, .iPhone8plus:
self.font = self.font?.withSize(?*self.font?.pointSize + 2)
case .iPhoneX, .iPhoneXR, .iPhoneXS, .iPhoneXSMax, .iPhone11, .iPhone11Pro, .iPhone11ProMax:
self.font = self.font?.withSize(?*self.font?.pointSize + 3)
default:
self.font = self.font?.withSize(?*self.font?.pointSize + 4)
//for button
class ClassButtonSizeClass: UIButton
override func awakeFromNib()
super.awakeFromNib()
switch UIDevice().type
case .iPhoneSE, .iPhone5, .iPhone5S, .iPhone5C:
self.titleLabel?.font = self.titleLabel?.font.withSize(?*self.titleLabel?.font.pointSize)
case .iPhone6, .iPhone6S, .iPhone7, .iPhone8:
self.titleLabel?.font = self.titleLabel?.font.withSize(?*self.titleLabel?.font.pointSize + 2)
case .iPhone6plus, .iPhone6Splus, .iPhone7plus, .iPhone8plus:
self.titleLabel?.font = self.titleLabel?.font.withSize(?*self.titleLabel?.font.pointSize + 2)
case .iPhoneX, .iPhoneXR, .iPhoneXS, .iPhoneXSMax, .iPhone11, .iPhone11Pro, .iPhone11ProMax:
self.titleLabel?.font = self.titleLabel?.font.withSize(?*self.titleLabel?.font.pointSize + 3)
default:
self.titleLabel?.font = self.titleLabel?.font.withSize(?*self.titleLabel?.font.pointSize + 4)
// for textView
class ClassTextViewSizeClass: UITextView
override func awakeFromNib()
super.awakeFromNib()
switch UIDevice().type
case .iPhoneSE, .iPhone5, .iPhone5S, .iPhone5C:
self.font = self.font?.withSize(?*self.font?.pointSize)
case .iPhone6, .iPhone6S, .iPhone7, .iPhone8:
self.font = self.font?.withSize(?*self.font?.pointSize + 2)
case .iPhone6plus, .iPhone6Splus, .iPhone7plus, .iPhone8plus:
self.font = self.font?.withSize(?*self.font?.pointSize + 2)
case .iPhoneX, .iPhoneXR, .iPhoneXS, .iPhoneXSMax, .iPhone11, .iPhone11Pro, .iPhone11ProMax:
self.font = self.font?.withSize(?*self.font?.pointSize + 3)
default:
self.font = self.font?.withSize(?*self.font?.pointSize + 4)
//for custom value returning
class ClassUIDeviceTypeReturn
static let shared = ClassUIDeviceTypeReturn()
func returnFloatValue(iPhone5: CGFloat, iPhone6: CGFloat, iPhone6Plus: CGFloat, iPhoneX: CGFloat, iPadDefault: CGFloat) -> CGFloat
switch UIDevice().type
case .iPhoneSE, .iPhone5, .iPhone5S, .iPhone5C:
return iPhone5
case .iPhone6, .iPhone6S, .iPhone7, .iPhone8:
return iPhone6
case .iPhone6plus, .iPhone6Splus, .iPhone7plus, .iPhone8plus:
return iPhone6Plus
case .iPhoneX, .iPhoneXR, .iPhoneXS, .iPhoneXSMax, .iPhone11, .iPhone11Pro, .iPhone11ProMax:
return iPhoneX
default:
return iPadDefault
public enum EnumModel: String
case simulator = "simulator/sandbox",
//iPod
iPod1 = "iPod 1",
iPod2 = "iPod 2",
iPod3 = "iPod 3",
iPod4 = "iPod 4",
iPod5 = "iPod 5",
//iPad
iPad2 = "iPad 2",
iPad3 = "iPad 3",
iPad4 = "iPad 4",
iPadAir = "iPad Air ",
iPadAir2 = "iPad Air 2",
iPad5 = "iPad 5", //aka iPad 2017
iPad6 = "iPad 6", //aka iPad 2018
//iPad mini
iPadMini = "iPad Mini",
iPadMini2 = "iPad Mini 2",
iPadMini3 = "iPad Mini 3",
iPadMini4 = "iPad Mini 4",
//iPad pro
iPadPro9_7 = "iPad Pro 9.7\"",
iPadPro10_5 = "iPad Pro 10.5\"",
iPadPro12_9 = "iPad Pro 12.9\"",
iPadPro2_12_9 = "iPad Pro 2 12.9\"",
//iPhone
iPhone4 = "iPhone 4",
iPhone4S = "iPhone 4S",
iPhone5 = "iPhone 5",
iPhone5S = "iPhone 5S",
iPhone5C = "iPhone 5C",
iPhone6 = "iPhone 6",
iPhone6plus = "iPhone 6 Plus",
iPhone6S = "iPhone 6S",
iPhone6Splus = "iPhone 6S Plus",
iPhoneSE = "iPhone SE",
iPhone7 = "iPhone 7",
iPhone7plus = "iPhone 7 Plus",
iPhone8 = "iPhone 8",
iPhone8plus = "iPhone 8 Plus",
iPhoneX = "iPhone X",
iPhoneXS = "iPhone XS",
iPhoneXSMax = "iPhone XS Max",
iPhoneXR = "iPhone XR",
iPhone11 = "iPhone 11",
iPhone11Pro = "iPhone 11 Pro",
iPhone11ProMax = "iPhone 11 Pro Max",
//Apple TV
AppleTV = "Apple TV",
AppleTV_4K = "Apple TV 4K",
unrecognized = "?unrecognized?"
// #-#-#-#-#-#-#-#-#-#-#-#-#-#-#
// MARK: UIDevice extensions
// #-#-#-#-#-#-#-#-#-#-#-#-#-#-#
public extension UIDevice
public var type: EnumModel
var systemInfo = utsname()
uname(&systemInfo)
let modelCode = withUnsafePointer(to: &systemInfo.machine)
$0.withMemoryRebound(to: CChar.self, capacity: 1)
ptr in String.init(validatingUTF8: ptr)
var modelMap : [ String: EnumModel ] = [
"i386": .simulator,
"x86_64": .simulator,
//iPod
"iPod1,1": .iPod1,
"iPod2,1": .iPod2,
"iPod3,1": .iPod3,
"iPod4,1": .iPod4,
"iPod5,1": .iPod5,
//iPad
"iPad2,1": .iPad2,
"iPad2,2": .iPad2,
"iPad2,3": .iPad2,
"iPad2,4": .iPad2,
"iPad3,1": .iPad3,
"iPad3,2": .iPad3,
"iPad3,3": .iPad3,
"iPad3,4": .iPad4,
"iPad3,5": .iPad4,
"iPad3,6": .iPad4,
"iPad4,1": .iPadAir,
"iPad4,2": .iPadAir,
"iPad4,3": .iPadAir,
"iPad5,3": .iPadAir2,
"iPad5,4": .iPadAir2,
"iPad6,11": .iPad5, //aka iPad 2017
"iPad6,12": .iPad5,
"iPad7,5": .iPad6, //aka iPad 2018
"iPad7,6": .iPad6,
//iPad mini
"iPad2,5": .iPadMini,
"iPad2,6": .iPadMini,
"iPad2,7": .iPadMini,
"iPad4,4": .iPadMini2,
"iPad4,5": .iPadMini2,
"iPad4,6": .iPadMini2,
"iPad4,7": .iPadMini3,
"iPad4,8": .iPadMini3,
"iPad4,9": .iPadMini3,
"iPad5,1": .iPadMini4,
"iPad5,2": .iPadMini4,
//iPad pro
"iPad6,3": .iPadPro9_7,
"iPad6,4": .iPadPro9_7,
"iPad7,3": .iPadPro10_5,
"iPad7,4": .iPadPro10_5,
"iPad6,7": .iPadPro12_9,
"iPad6,8": .iPadPro12_9,
"iPad7,1": .iPadPro2_12_9,
"iPad7,2": .iPadPro2_12_9,
//iPhone
"iPhone3,1": .iPhone4,
"iPhone3,2": .iPhone4,
"iPhone3,3": .iPhone4,
"iPhone4,1": .iPhone4S,
"iPhone5,1": .iPhone5,
"iPhone5,2": .iPhone5,
"iPhone5,3": .iPhone5C,
"iPhone5,4": .iPhone5C,
"iPhone6,1": .iPhone5S,
"iPhone6,2": .iPhone5S,
"iPhone7,1": .iPhone6plus,
"iPhone7,2": .iPhone6,
"iPhone8,1": .iPhone6S,
"iPhone8,2": .iPhone6Splus,
"iPhone8,4": .iPhoneSE,
"iPhone9,1": .iPhone7,
"iPhone9,3": .iPhone7,
"iPhone9,2": .iPhone7plus,
"iPhone9,4": .iPhone7plus,
"iPhone10,1": .iPhone8,
"iPhone10,4": .iPhone8,
"iPhone10,2": .iPhone8plus,
"iPhone10,5": .iPhone8plus,
"iPhone10,3": .iPhoneX,
"iPhone10,6": .iPhoneX,
"iPhone11,2": .iPhoneXS,
"iPhone11,4": .iPhoneXSMax,
"iPhone11,6": .iPhoneXSMax,
"iPhone11,8": .iPhoneXR,
"iPhone12,1": .iPhone11,
"iPhone12,3": .iPhone11Pro,
"iPhone12,5": .iPhone11ProMax,
//AppleTV
"AppleTV5,3": .AppleTV,
"AppleTV6,2": .AppleTV_4K
]
if let model = modelMap[String.init(validatingUTF8: modelCode!)!]
if model == .simulator
if let simModelCode = ProcessInfo().environment["SIMULATOR_MODEL_IDENTIFIER"]
if let simModel = modelMap[String.init(validatingUTF8: simModelCode)!]
return simModel
return model
return EnumModel.unrecognized
不要忘记为故事板中的标签、文本字段、按钮、文本视图提供自定义类。
希望对你有帮助:)
【讨论】：
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