开发中经常碰到设计图里面的字体是系统字体里面不包含的，其实也不是说不能用设计的字体，但是一般情况下如果设计图里的字体包含多种的时候，就需要导入多种相对应的字体。有些字体包会很大，但却只有在一个地方使用，这样就感觉得不偿失！如果使用系统的某一种字体就能达到效果，岂不甚好！

一、打印系统字体代码

 for familyName in UIFont.familyNames {
     print("FamilyNames: " + familyName)
     for fontName in UIFont.fontNames(forFamilyName: familyName) {
            print("FontName: " + fontName)
      }
  }

FamilyNames即表示字体名称集（家族），他的每个下面可能有多种字体。
FontName即表示具体的字体的名称，它是FamilyNames里面的具体字体

二、字体打印值（包含的系统字体）

• FamilyNames: Copperplate

FontName: Copperplate-Light
FontName: Copperplate
FontName: Copperplate-Bold

• FamilyNames: Heiti SC
• FamilyNames: Apple SD Gothic Neo

FontName: AppleSDGothicNeo-Thin
FontName: AppleSDGothicNeo-Light
FontName: AppleSDGothicNeo-Regular
FontName: AppleSDGothicNeo-Bold
FontName: AppleSDGothicNeo-SemiBold
FontName: AppleSDGothicNeo-UltraLight
FontName: AppleSDGothicNeo-Medium

• FamilyNames: Thonburi

FontName: Thonburi
FontName: Thonburi-Light
FontName: Thonburi-Bold

• FamilyNames: Gill Sans

FontName: GillSans-Italic
FontName: GillSans-SemiBold
FontName: GillSans-UltraBold
FontName: GillSans-Light
FontName: GillSans-Bold
FontName: GillSans
FontName: GillSans-SemiBoldItalic
FontName: GillSans-BoldItalic
FontName: GillSans-LightItalic

• FamilyNames: Marker Felt

FontName: MarkerFelt-Thin
FontName: MarkerFelt-Wide

• FamilyNames: Hiragino Maru Gothic ProN

FontName: HiraMaruProN-W4

• FamilyNames: Courier New

FontName: CourierNewPS-ItalicMT
FontName: CourierNewPSMT
FontName: CourierNewPS-BoldItalicMT
FontName: CourierNewPS-BoldMT

• FamilyNames: Kohinoor Telugu

FontName: KohinoorTelugu-Regular
FontName: KohinoorTelugu-Medium
FontName: KohinoorTelugu-Light

• FamilyNames: Heiti TC
• FamilyNames: Avenir Next Condensed

FontName: AvenirNextCondensed-Heavy
FontName: AvenirNextCondensed-MediumItalic
FontName: AvenirNextCondensed-Regular
FontName: AvenirNextCondensed-UltraLightItalic
FontName: AvenirNextCondensed-Medium
FontName: AvenirNextCondensed-HeavyItalic
FontName: AvenirNextCondensed-DemiBoldItalic
FontName: AvenirNextCondensed-Bold
FontName: AvenirNextCondensed-DemiBold
FontName: AvenirNextCondensed-BoldItalic
FontName: AvenirNextCondensed-Italic
FontName: AvenirNextCondensed-UltraLight

• FamilyNames: Tamil Sangam MN

FontName: TamilSangamMN
FontName: TamilSangamMN-Bold

• FamilyNames: Helvetica Neue

FontName: HelveticaNeue-UltraLightItalic
FontName: HelveticaNeue-Medium
FontName: HelveticaNeue-MediumItalic
FontName: HelveticaNeue-UltraLight
FontName: HelveticaNeue-Italic
FontName: HelveticaNeue-Light
FontName: HelveticaNeue-ThinItalic
FontName: HelveticaNeue-LightItalic
FontName: HelveticaNeue-Bold
FontName: HelveticaNeue-Thin
FontName: HelveticaNeue-CondensedBlack
FontName: HelveticaNeue
FontName: HelveticaNeue-CondensedBold
FontName: HelveticaNeue-BoldItalic

• FamilyNames: Gurmukhi MN

FontName: GurmukhiMN-Bold
FontName: GurmukhiMN

• FamilyNames: Georgia

FontName: Georgia-BoldItalic
FontName: Georgia-Italic
FontName: Georgia
FontName: Georgia-Bold

• FamilyNames: Times New Roman

FontName: TimesNewRomanPS-ItalicMT
FontName: TimesNewRomanPS-BoldItalicMT
FontName: TimesNewRomanPS-BoldMT
FontName: TimesNewRomanPSMT

• FamilyNames: Sinhala Sangam MN

FontName: SinhalaSangamMN-Bold
FontName: SinhalaSangamMN

• FamilyNames: Arial Rounded MT Bold

FontName: ArialRoundedMTBold

• FamilyNames: Kailasa

FontName: Kailasa-Bold
FontName: Kailasa

• FamilyNames: Kohinoor Devanagari

FontName: KohinoorDevanagari-Regular
FontName: KohinoorDevanagari-Light
FontName: KohinoorDevanagari-Semibold

• FamilyNames: Kohinoor Bangla

FontName: KohinoorBangla-Regular
FontName: KohinoorBangla-Semibold
FontName: KohinoorBangla-Light

• FamilyNames: Chalkboard SE

FontName: ChalkboardSE-Bold
FontName: ChalkboardSE-Light
FontName: ChalkboardSE-Regular

• FamilyNames: Apple Color Emoji

FontName: AppleColorEmoji

• FamilyNames: PingFang TC

FontName: PingFangTC-Regular
FontName: PingFangTC-Thin
FontName: PingFangTC-Medium
FontName: PingFangTC-Semibold
FontName: PingFangTC-Light
FontName: PingFangTC-Ultralight

• FamilyNames: Gujarati Sangam MN

FontName: GujaratiSangamMN
FontName: GujaratiSangamMN-Bold

• FamilyNames: Geeza Pro

FontName: GeezaPro-Bold
FontName: GeezaPro

• FamilyNames: Damascus

FontName: DamascusBold
FontName: DamascusLight
FontName: Damascus
FontName: DamascusMedium
FontName: DamascusSemiBold

• FamilyNames: Noteworthy

FontName: Noteworthy-Bold
FontName: Noteworthy-Light

• FamilyNames: Avenir

FontName: Avenir-Oblique
FontName: Avenir-HeavyOblique
FontName: Avenir-Heavy
FontName: Avenir-BlackOblique
FontName: Avenir-BookOblique
FontName: Avenir-Roman
FontName: Avenir-Medium
FontName: Avenir-Black
FontName: Avenir-Light
FontName: Avenir-MediumOblique
FontName: Avenir-Book
FontName: Avenir-LightOblique

• FamilyNames: Mishafi

FontName: DiwanMishafi

• FamilyNames: Academy Engraved LET

FontName: AcademyEngravedLetPlain

• FamilyNames: Futura

FontName: Futura-CondensedExtraBold
FontName: Futura-Medium
FontName: Futura-Bold
FontName: Futura-CondensedMedium
FontName: Futura-MediumItalic

• FamilyNames: Party LET

FontName: PartyLetPlain

• FamilyNames: Kannada Sangam MN

FontName: KannadaSangamMN-Bold
FontName: KannadaSangamMN

• FamilyNames: Arial Hebrew

FontName: ArialHebrew-Bold
FontName: ArialHebrew-Light
FontName: ArialHebrew

• FamilyNames: Farah

FontName: Farah

• FamilyNames: Arial

FontName: Arial-BoldMT
FontName: Arial-BoldItalicMT
FontName: Arial-ItalicMT
FontName: ArialMT

• FamilyNames: Chalkduster

FontName: Chalkduster

• FamilyNames: Kefa

FontName: Kefa-Regular

• FamilyNames: Hoefler Text

FontName: HoeflerText-Italic
FontName: HoeflerText-Black
FontName: HoeflerText-Regular
FontName: HoeflerText-BlackItalic

• FamilyNames: Optima

FontName: Optima-ExtraBlack
FontName: Optima-BoldItalic
FontName: Optima-Italic
FontName: Optima-Regular
FontName: Optima-Bold

• FamilyNames: Palatino

FontName: Palatino-Italic
FontName: Palatino-Roman
FontName: Palatino-BoldItalic
FontName: Palatino-Bold

• FamilyNames: Malayalam Sangam MN

FontName: MalayalamSangamMN-Bold
FontName: MalayalamSangamMN

• FamilyNames: Al Nile

FontName: AlNile
FontName: AlNile-Bold

• FamilyNames: Lao Sangam MN

FontName: LaoSangamMN

• FamilyNames: Bradley Hand

FontName: BradleyHandITCTT-Bold

• FamilyNames: Hiragino Mincho ProN

FontName: HiraMinProN-W3
FontName: HiraMinProN-W6

• FamilyNames: PingFang HK

FontName: PingFangHK-Medium
FontName: PingFangHK-Thin
FontName: PingFangHK-Regular
FontName: PingFangHK-Ultralight
FontName: PingFangHK-Semibold
FontName: PingFangHK-Light

• FamilyNames: Helvetica

FontName: Helvetica-Oblique
FontName: Helvetica-BoldOblique
FontName: Helvetica
FontName: Helvetica-Light
FontName: Helvetica-Bold
FontName: Helvetica-LightOblique

• FamilyNames: Courier

FontName: Courier-BoldOblique
FontName: Courier-Oblique
FontName: Courier
FontName: Courier-Bold

• FamilyNames: Cochin

FontName: Cochin-Italic
FontName: Cochin-Bold
FontName: Cochin
FontName: Cochin-BoldItalic

• FamilyNames: Trebuchet MS

FontName: TrebuchetMS-Bold
FontName: TrebuchetMS-Italic
FontName: Trebuchet-BoldItalic
FontName: TrebuchetMS

• FamilyNames: Devanagari Sangam MN

FontName: DevanagariSangamMN
FontName: DevanagariSangamMN-Bold

• FamilyNames: Oriya Sangam MN

FontName: OriyaSangamMN
FontName: OriyaSangamMN-Bold

• FamilyNames: Rockwell

FontName: Rockwell-Italic
FontName: Rockwell-Regular
FontName: Rockwell-Bold
FontName: Rockwell-BoldItalic

• FamilyNames: Snell Roundhand

FontName: SnellRoundhand
FontName: SnellRoundhand-Bold
FontName: SnellRoundhand-Black

• FamilyNames: Zapf Dingbats

FontName: ZapfDingbatsITC

• FamilyNames: Bodoni 72

FontName: BodoniSvtyTwoITCTT-Bold
FontName: BodoniSvtyTwoITCTT-BookIta
FontName: BodoniSvtyTwoITCTT-Book

• FamilyNames: Verdana

FontName: Verdana-Italic
FontName: Verdana
FontName: Verdana-Bold
FontName: Verdana-BoldItalic

• FamilyNames: American Typewriter

FontName: AmericanTypewriter-CondensedBold
FontName: AmericanTypewriter-Condensed
FontName: AmericanTypewriter-CondensedLight
FontName: AmericanTypewriter
FontName: AmericanTypewriter-Bold
FontName: AmericanTypewriter-Semibold
FontName: AmericanTypewriter-Light

• FamilyNames: Avenir Next

FontName: AvenirNext-Medium
FontName: AvenirNext-DemiBoldItalic
FontName: AvenirNext-DemiBold
FontName: AvenirNext-HeavyItalic
FontName: AvenirNext-Regular
FontName: AvenirNext-Italic
FontName: AvenirNext-MediumItalic
FontName: AvenirNext-UltraLightItalic
FontName: AvenirNext-BoldItalic
FontName: AvenirNext-Heavy
FontName: AvenirNext-Bold
FontName: AvenirNext-UltraLight

• FamilyNames: Baskerville

FontName: Baskerville-SemiBoldItalic
FontName: Baskerville-SemiBold
FontName: Baskerville-BoldItalic
FontName: Baskerville
FontName: Baskerville-Bold
FontName: Baskerville-Italic

• FamilyNames: Khmer Sangam MN

FontName: KhmerSangamMN

• FamilyNames: Didot

FontName: Didot-Bold
FontName: Didot
FontName: Didot-Italic

• FamilyNames: Savoye LET

FontName: SavoyeLetPlain

• FamilyNames: Bodoni Ornaments

FontName: BodoniOrnamentsITCTT

• FamilyNames: Symbol

FontName: Symbol

• FamilyNames: Charter

FontName: Charter-BlackItalic
FontName: Charter-Bold
FontName: Charter-Roman
FontName: Charter-Black
FontName: Charter-BoldItalic
FontName: Charter-Italic

• FamilyNames: Menlo

FontName: Menlo-BoldItalic
FontName: Menlo-Bold
FontName: Menlo-Italic
FontName: Menlo-Regular

• FamilyNames: Noto Nastaliq Urdu

FontName: NotoNastaliqUrdu

• FamilyNames: Bodoni 72 Smallcaps

FontName: BodoniSvtyTwoSCITCTT-Book

• FamilyNames: DIN Alternate

FontName: DINAlternate-Bold

• FamilyNames: Papyrus

FontName: Papyrus-Condensed
FontName: Papyrus

• FamilyNames: Hiragino Sans

FontName: HiraginoSans-W3
FontName: HiraginoSans-W6

• FamilyNames: PingFang SC

FontName: PingFangSC-Medium
FontName: PingFangSC-Semibold
FontName: PingFangSC-Light
FontName: PingFangSC-Ultralight
FontName: PingFangSC-Regular
FontName: PingFangSC-Thin

• FamilyNames: Myanmar Sangam MN

FontName: MyanmarSangamMN
FontName: MyanmarSangamMN-Bold

• FamilyNames: Noto Sans Chakma

FontName: NotoSansChakma-Regular

• FamilyNames: Zapfino

FontName: Zapfino

• FamilyNames: Telugu Sangam MN
• FamilyNames: Bodoni 72 Oldstyle

FontName: BodoniSvtyTwoOSITCTT-BookIt
FontName: BodoniSvtyTwoOSITCTT-Book
FontName: BodoniSvtyTwoOSITCTT-Bold

• FamilyNames: Euphemia UCAS

FontName: EuphemiaUCAS
FontName: EuphemiaUCAS-Italic
FontName: EuphemiaUCAS-Bold

• FamilyNames: Bangla Sangam MN
• FamilyNames: DIN Condensed

FontName: DINCondensed-Bold

以上便是打印的所有系统字体，记录一下，方便自己查看！