Swift weekly 8/16

Transcript

1. Swift पใ 8/16 John Lin @johnlinvc
2. From the core • Swift 3 ఆҊ • ։࢝։ᚙ Swift 4
3. Evolution • SE-0117 ე෼ެ։࿨Մ៺ঝ • SE-0125 ҠআNonObjectiveCBase ࿨ isUniquelyReferenced • SE-0127 ߋ৽ stdlib தᢛPointer ࿨ Buffer ૬᮫വᏐ • SE-0128 UnicodeScalar తfailable ݐߏࣜ
4. SE-0117 ე෼ެ։࿨Մ៺ঝ • ໨લSwift ༗ҎԼزछᒟݶ᮫伴ࣈ • private : ୞༗ಉҰݸ䈕Ҋ㚎ՄҎ࢖༻ • internal : ୞༗ಉҰݸModule (target) 㚎ՄҎ࢖༻ • public : ଖଞత Module ໵ՄҎ࢖༻ • final : ෆೳⴺ៺ঝ҃ override
5. SE-0117 ე෼ެ։࿨Մ៺ঝ • ৽⃧Ұݸ open ᒟݶ᮫伴ࣈɼ૬ᙛԙݱࡏత public ᮫伴ࣈɻ • public ᮫伴ࣈత։์ఔ౓ሡ߱௿ɼ୞ೳⴺ࢖༻ɼୠ ੋෆೳ៺ঝ҃override • ؆ᄸိ㘸बੋ༬ઃෆೳ៺ঝ҃overrideɻ
6. SE-0117 ე෼ެ։࿨Մ៺ঝ //ผతModule㚎ෆೳⴺὺӵđᆺି൐Ⴈ public class publicClass{ //ࡏผతModule 㚎ෆೳ override public func foo() {} //ࡏผతModule 㚎ෆೳ overrideɼ Ҽҝclass ෆੋ open open func bar() {} //ࡏಉҰݸ Module 㚎໵ෆೳ override public final func baz() {} }
7. SE-0117 ე෼ެ։࿨Մ៺ঝ //ผతModule 㚎ՄҎ៺ঝ open class openClass{ // ผత Module㚎ෆೳ override public var count:Int // ผత Module㚎ෆೳ override public func foo(){} // ผత Module㚎ՄҎ override open func bar(){} //ࡏಉҰݸ Module 㚎໵ෆೳ override public final func baz() {} }
8. SE-0125 ҠআNonObjectiveCBase ࿨ isUniquelyReferenced • NonObjectiveCBase Class ੋ༻ိඪࣔෆੋObj-C Class త Base Class • isUniquelyReferenced ՄҎ༻ိ֬ೝ NonObjectiveCBase త Object ੋෆੋ୞༗Ұݸᘐಛ త Reference
9. SE-0125 ҠআNonObjectiveCBase ࿨ isUniquelyReferenced • ୠੋ isUniquelyReferencedNonObjC ఏڙҰᒬతᏈ Ռɼࣕ׌ෆध៺ঝ NonObjectiveCBase • Ҡআ NonObjectiveCBase & isUniquelyReferencedɼ ฒሡisUniquelyReferencedNonObjC վ໊੒ isKnownUniquelyReferenced
10. SE-0127 ߋ৽ stdlib தᢛPointer ࿨ Buffer ૬᮫വᏐ • withUnsafePointer ৽⃧ to: ඪត • Ҡআ withUnsafePointers വᏐ • Ҡআ unsafeAddress(of:) ՄҎվ༻ ObjectIdentifier(obj).unsafeAddress • Ҡআ ManagedProtoBuffer Class
11. SE-0128 UnicodeScalar తfailable ݐߏࣜ ݱࡏ
 var string = "" let codepoint: UInt32 = 55357 // ແᏈతcodepoint let ucode = UnicodeScalar(codepoint) // രᖵ string.append(ucode)
12. SE-0128 UnicodeScalar తfailable ݐߏࣜ ະိ
 var string = "" let codepoint: UInt32 = 55357 // ແᏈతcodepoint if let ucode = UnicodeScalar(codepoint) { string.append(ucode) }
13. Evolution • SE-0129 ߋ৽౟݅؅ཧثతଌࢼ໋໊׳ྫ • SE-0130 ڧԽ String(repeating:, count:) API • SE-0131 ৽⃧ AnyHashable • SE-0133 flatten վ໊ҝ joined • SE-0134 मվၷݸ UTF8 ૬᮫త String property
14. SE-0129 ߋ৽౟݅؅ཧثతଌࢼ ໋໊׳ྫ • ॴ༗ࡏ Tests/ ࢿྉᇄதత *Tests ౎။ඃᙛ੒ Test Module • FooTests ။ࣗಈ࿨ Foo Module 㗞ੜ᮫࿆ • Tests/ ࢿྉᇄத೗Ռ༗ࣥߦ䈕။ඃࢹҝࡨޡ • Sources/ ࢿྉᇄத೗Ռ༗ଌࢼ။ඃࢹҝࡨޡ
15. SE-0130 ڧԽ String(repeating:, count:) API • ݱࡏ let x = String(repeating:"5", count: 6) // ࡨޡ let x = String(repeating:"5" as UnicodeScalar , count: 6) // "555555" let x = String(repeating:"5" as Character , count: 6) // "555555" • ະိ let x = String(repeating:"5", count: 6) // lz let x = String(repeating:"5" as UnicodeScalar , count: 6) // ࡨޡ let x = String(repeating:"5" as Character , count: 6) // ࡨޡ
16. SE-0131 ৽⃧ AnyHashable • ݱࡏ NSDictionary ။ඃაೖ੒
 [NSObject : AnyObject] • ະိ။ඃაೖ੒ [AnyHashable : Any] • AnyHashable ੋҰݸ९॥ Equatable ࿨ Hashable త Struct
17. SE-0133 flatten վ໊ҝ joined • ݱࡏ [[1,2],[3]].flatten() // [1,2,3] [[1,2],[3]].joined(separator: []) // [1,2,3] [[1,2],[3]].joined(separator: [0]) // [1,2,0,3] [[1,2],[3]].joined() // ࡨޡ • ະိ [[1,2],[3]].joined() // [1,2,3] [[1,2],[3]].joined(separator: []) // [1,2,3] [[1,2],[3]].joined(separator: [0]) // [1,2,0,3] [[1,2],[3]].flatten() // ࡨޡ
18. SE-0134 मվၷݸ UTF8 ૬᮫త String property • Ҡআ nulTerminatedUTF8 • ሡ nulTerminatedUTF8CString վ໊ҝ UTF8CString
19. Evolution • SE-0135 ౟݅؅ཧثሣෆಉSwfit ൛ຊత૬༰ੑ • SE-0136 sizeofValue ෮׆
20. SE-0135 ౟݅؅ཧثሣෆಉSwfit ൛ຊత૬༰ੑ • ౟݅؅ཧث။ಁաgit tag ҃ Package.swift ိࣗಈఁଌࢧ ԉత Swift ൛ຊ • LibFoo త 1.5 ൛ɼ ೗ՌࡏෆಉతBranch ಉ࣌ࢧԉ 2.3 ࿨ 3.0 ൛త Swiftɻ ҰݸతGit Tag ။ੋ 1.5@swift-2.3 ɼ㠥Ұ ݸ။ੋ 1.5@swift-3.0 • ҃ੋࡏಉҰݸBranch ্ɼҰݸ࢖༻ Package@swift-2.3.swift 㠥Ұݸ࢖༻ package@swift-3.0.swift
21. SE-0136 sizeofValue ෮׆ • ೭લ SE-0101 ೺sizeof Ҡআɻ • ޙိᚙݱؐੋ༗ඞཁ • ॴҎҎԼతfunction ෮׆ྃ • MemoryLayout.size(ofValue: x)
 MemoryLayout.stride(ofValue: x)
 MemoryLayout.alignment(ofValue: x)