{"id":2020,"date":"2026-07-28T06:23:40","date_gmt":"2026-07-28T06:23:40","guid":{"rendered":"https:\/\/www.vpascode.com\/vn\/docs\/uncategorized\/swift-visualizer-guide\/"},"modified":"2026-07-28T06:23:40","modified_gmt":"2026-07-28T06:23:40","slug":"swift-visualizer-guide","status":"publish","type":"ld_docs","link":"https:\/\/www.vpascode.com\/vn\/docs\/vpascode-docs\/swift-visualizer-guide\/","title":{"rendered":"Swift"},"content":{"rendered":"

Khi thi\u1ebft k\u1ebf \u1ee9ng d\u1ee5ng Swift cho iOS, macOS ho\u1eb7c ph\u00eda m\u00e1y ch\u1ee7, vi\u1ec7c \u0111\u1ecdc c\u00e1c khai b\u00e1o giao th\u1ee9c d\u00e0y \u0111\u1eb7c, c\u00e1c c\u1ea5u tr\u00fac ki\u1ec3u gi\u00e1 tr\u1ecb v\u00e0 c\u00e1c ph\u00e2n c\u1ea5p l\u1edbp ki\u1ec3u tham chi\u1ebfu c\u00f3 th\u1ec3 khi\u1ebfn vi\u1ec7c h\u00ecnh dung ki\u1ebfn tr\u00fac h\u1ec7 th\u1ed1ng t\u1ed5ng th\u1ec3 tr\u1edf n\u00ean kh\u00f3 kh\u0103n. Swift Visualizer<\/strong>chuy\u1ec3n \u0111\u1ed5i c\u00e1c giao th\u1ee9c Swift, c\u1ea5u tr\u00fac, l\u1edbp, ki\u1ec3u li\u1ec7t k\u00ea c\u00f3 gi\u00e1 tr\u1ecb li\u00ean k\u1ebft v\u00e0 c\u00e1c ph\u1ea7n m\u1edf r\u1ed9ng giao th\u1ee9c th\u00e0nh c\u00e1c s\u01a1 \u0111\u1ed3 l\u1edbp r\u00f5 r\u00e0ng, t\u01b0\u01a1ng t\u00e1c. B\u1eb1ng c\u00e1ch ph\u00e2n t\u00edch c\u00e1c khai b\u00e1o thu\u1ed9c t\u00ednh (let<\/code>, var<\/code>), c\u00e1c ch\u1ec9 th\u1ecb ki\u1ec3m so\u00e1t truy c\u1eadp, s\u1ef1 tu\u00e2n th\u1ee7 giao th\u1ee9c v\u00e0 c\u00e1c m\u1ea1ng l\u01b0\u1edbi k\u1ebf th\u1eeba, c\u00e1c k\u1ef9 s\u01b0 iOS v\u00e0 ki\u1ebfn tr\u00fac vi\u00ean di \u0111\u1ed9ng c\u00f3 th\u1ec3 quan s\u00e1t tr\u1ef1c quan c\u00e1c m\u1eabu thi\u1ebft k\u1ebf \u1ee9ng d\u1ee5ng ch\u1ec9 trong m\u1ed9t c\u00e1i nh\u00ecn.<\/p>\n

C\u01a1 ch\u1ebf c\u1ee7a c\u00e1c b\u1ea3n \u0111\u1ed3 tr\u1ef1c quan Swift<\/h2>\n

Trong VPasCode, vi\u1ec7c hi\u1ec3n th\u1ecb Swift t\u1ef1 \u0111\u1ed9ng ph\u00e2n t\u00edch giao th\u1ee9c<\/code>c\u00e1c \u0111\u1ecbnh ngh\u0129a, c\u1ea5u tr\u00fac<\/code>ki\u1ec3u gi\u00e1 tr\u1ecb, l\u1edbp<\/code>ki\u1ec3u tham chi\u1ebfu, v\u00e0 ki\u1ec3u li\u1ec7t k\u00ea<\/code>c\u00e1c bi\u1ebfn th\u1ec3 th\u00e0nh c\u00e1c th\u1ebb s\u01a1 \u0111\u1ed3 c\u00f3 c\u1ea5u tr\u00fac theo phong c\u00e1ch UML. C\u00e1c ki\u1ec3u gi\u00e1 tr\u1ecb v\u00e0 giao th\u1ee9c \u0111\u00f3ng vai tr\u00f2 l\u00e0 c\u00e1c n\u00fat ch\u00ednh trong mi\u1ec1n, c\u00e1c h\u1ee3p \u0111\u1ed3ng thu\u1ed9c t\u00ednh \u0111\u01b0\u1ee3c li\u1ec7t k\u00ea nh\u01b0 c\u00e1c thu\u1ed9c t\u00ednh c\u00f3 ki\u1ec3u, v\u00e0 c\u00e1c t\u1eeb kh\u00f3a tu\u00e2n th\u1ee7 giao th\u1ee9c ho\u1eb7c k\u1ebf th\u1eeba l\u1edbp t\u1ea1o ra c\u00e1c k\u1ebft n\u1ed1i quan h\u1ec7 r\u00f5 r\u00e0ng gi\u1eefa c\u00e1c th\u1ef1c th\u1ec3 tr\u1ef1c quan.<\/p>\n

1. C\u00e0i \u0111\u1eb7t c\u01a1 b\u1ea3n<\/h3>\n

\u0110\u1ec3 tr\u1ef1c quan h\u00f3a ki\u1ebfn tr\u00fac Swift ti\u00eau chu\u1ea9n, h\u00e3y \u0111\u1ecbnh ngh\u0129a c\u00e1c giao th\u1ee9c cho c\u00e1c h\u1ee3p \u0111\u1ed3ng h\u00e0nh vi c\u00f9ng v\u1edbi c\u00e1c c\u1ea5u tr\u00fac v\u00e0 l\u1edbp. M\u1ed9t h\u1ec7 sinh th\u00e1i nh\u00e0 th\u00f4ng minh IoT minh h\u1ecda c\u00e1c kh\u00e1i ni\u1ec7m c\u01a1 b\u1ea3n v\u1ec1 tu\u00e2n th\u1ee7 giao th\u1ee9c Swift v\u00e0 c\u00e1c ki\u1ec3u gi\u00e1 tr\u1ecb:<\/p>\n

\n
\nSwift<\/span>
\n
\n<\/path><\/path><\/svg>
\nCh\u1ec9nh s\u1eeda Swift trong VPasCode<\/span>
\n<\/a>\n<\/div>\n
\n
\r\n
\r\n Swift<\/span>\r\n \r\n <\/path><\/path><\/svg>\r\n Edit Swift in VPasCode<\/span>\r\n <\/a>\r\n <\/div>\r\n
\r\n 
import Foundation\r\n\r\n\/\/ Ki\u1ec3u li\u1ec7t k\u00ea \u0111\u1ea1i di\u1ec7n cho tr\u1ea1ng th\u00e1i ngu\u1ed3n \u0111i\u1ec7n v\u1edbi ki\u1ec3u gi\u00e1 tr\u1ecb\r\npublic enum DeviceState {\r\n    case off\r\n    case standby\r\n    case active(powerUsageWatts: Double)\r\n}\r\n\r\n\/\/ H\u1ee3p \u0111\u1ed3ng giao th\u1ee9c cho c\u00e1c thi\u1ebft b\u1ecb ngo\u1ea1i vi nh\u00e0 th\u00f4ng minh\r\npublic protocol SmartDevice {\r\n    var deviceID: String { get }\r\n    var name: String { get set }\r\n    var state: DeviceState { get }\r\n    \r\n    func turnOn()\r\n    func turnOff()\r\n}\r\n\r\n\/\/ Tri\u1ec3n khai c\u1ea5u tr\u00fac cho m\u1ed9t b\u00f3ng \u0111\u00e8n th\u00f4ng minh\r\npublic struct SmartBulb: SmartDevice {\r\n    public let deviceID: String\r\n    public var name: String\r\n    public private(set) var state: DeviceState\r\n    public var brightnessLevel: Int\r\n\r\n    public init(deviceID: String, name: String, brightnessLevel: Int = 100) {\r\n        self.deviceID = deviceID\r\n        self.name = name\r\n        self.brightnessLevel = brightnessLevel\r\n        self.state = .off\r\n    }\r\n\r\n    public mutating func turnOn() {\r\n        self.state = .active(powerUsageWatts: 9.5)\r\n    }\r\n\r\n    public mutating func turnOff() {\r\n        self.state = .off\r\n    }\r\n}<\/code><\/pre>                <\/div>\r\n                
\r\n                    \r\n                        <\/path><\/path><\/svg>\r\n                        Edit Swift in VPasCode<\/span>\r\n                    <\/a>\r\n                <\/div>\r\n            <\/div>\r\n            \n<\/p><\/div>\n
\n
\n<\/path><\/path><\/svg>
\nCh\u1ec9nh s\u1eeda Swift trong VPasCode<\/span>
\n<\/a>\n<\/div>\n<\/div>\n
\"\"<\/p>\n
\u00a0<\/p>\n
C\u00e1c k\u1ef9 thu\u1eadt c\u1ea5u tr\u00fac n\u00e2ng cao<\/h2>\n
C\u00e1c b\u1ea3n \u0111\u1ed3 tr\u1ef1c quan Swift xu\u1ea5t s\u1eafc trong vi\u1ec7c m\u00f4 t\u1ea3 c\u00e1c x\u1eed l\u00fd mua h\u00e0ng StoreKit, c\u00e1c m\u00e1y tr\u1ea1ng th\u00e1i ki\u1ec3u li\u1ec7t k\u00ea c\u00f3 gi\u00e1 tr\u1ecb li\u00ean k\u1ebft, v\u00e0 c\u00e1c ki\u1ebfn tr\u00fac d\u1ecbch v\u1ee5 \u0111\u1ecbnh h\u01b0\u1edbng giao th\u1ee9c.<\/p>\n
1. D\u1ecbch v\u1ee5 \u0111\u0103ng k\u00fd App Store v\u00e0 mua trong \u1ee9ng d\u1ee5ng<\/h3>\n
B\u1eb1ng c\u00e1ch k\u1ebft h\u1ee3p c\u00e1c ki\u1ec3u li\u1ec7t k\u00ea v\u1edbi c\u00e1c t\u1ea3i tr\u1ecdng giao d\u1ecbch li\u00ean k\u1ebft, c\u00e1c giao th\u1ee9c \u1ee7y nhi\u1ec7m v\u00e0 c\u00e1c l\u1edbp qu\u1ea3n l\u00fd, VPasCode ph\u00e2n t\u00edch r\u00f5 r\u00e0ng c\u00e1c ki\u1ebfn tr\u00fac \u0111\u1ecbnh ph\u00ed iOS ph\u1ee9c t\u1ea1p th\u00e0nh c\u00e1c c\u00e2y tr\u1ef1c quan d\u1ec5 \u0111\u1ecdc:<\/p>\n
\n
\nSwift<\/span>
\n
\n<\/path><\/path><\/svg>
\nCh\u1ec9nh s\u1eeda Swift trong VPasCode<\/span>
\n<\/a>\n<\/div>\n
\n            
\r\n                                
\r\n                    Swift<\/span>\r\n                    \r\n                        <\/path><\/path><\/svg>\r\n                        Edit Swift in VPasCode<\/span>\r\n                    <\/a>\r\n                <\/div>\r\n                                
\r\n                    
import Foundation\r\n\r\npublic enum PurchaseResult {\r\n    case success(transactionID: String, purchasedAt: Date)\r\n    case pending\r\n    case failed(errorDescription: String)\r\n}\r\n\r\npublic protocol StoreServiceDelegate: AnyObject {\r\n    func storeService(_ service: StoreManager, didUpdateResult result: PurchaseResult)\r\n}\r\n\r\npublic final class StoreManager {\r\n    public private(set) var activeSubscriptionID: String?\r\n    public weak var delegate: StoreServiceDelegate?\r\n\r\n    public init(activeSubscriptionID: String? = nil) {\r\n        self.activeSubscriptionID = activeSubscriptionID\r\n    }\r\n\r\n    public func purchaseProduct(productID: String) {\r\n        \/\/ M\u00f4 ph\u1ecfng x\u1eed l\u00fd giao d\u1ecbch\r\n        let result = PurchaseResult.success(transactionID: \"tx_99401\", purchasedAt: Date())\r\n        self.activeSubscriptionID = productID\r\n        delegate?.storeService(self, didUpdateResult: result)\r\n    }\r\n}<\/code><\/pre>                <\/div>\r\n                
\r\n                    \r\n                        <\/path><\/path><\/svg>\r\n                        Edit Swift in VPasCode<\/span>\r\n                    <\/a>\r\n                <\/div>\r\n            <\/div>\r\n            \n<\/p><\/div>\n
\n
\n<\/path><\/path><\/svg>
\nCh\u1ec9nh s\u1eeda Swift trong VPasCode<\/span>
\n<\/a>\n<\/div>\n<\/div>\n
\"\"<\/p>\n
\u00a0<\/p>\n
C\u1ea5u tr\u00fac c\u00e1c b\u1ed9 \u0111\u1ecbnh tuy\u1ebfn th\u00f4ng b\u00e1o \u0111\u1ea9y v\u00e0 tin nh\u1eafn<\/h2>\n
Vi\u1ec7c tr\u1ef1c quan h\u00f3a c\u00e1c c\u1ea5u tr\u00fac d\u1eef li\u1ec7u, k\u00eanh th\u00f4ng b\u00e1o v\u00e0 c\u00e1c gi\u00e1 tr\u1ecb m\u1eb7c \u0111\u1ecbnh m\u1edf r\u1ed9ng giao th\u1ee9c gi\u00fap c\u00e1c k\u1ef9 s\u01b0 n\u1ec1n t\u1ea3ng Apple duy tr\u00ec s\u1ef1 t\u00e1ch bi\u1ec7t r\u00f5 r\u00e0ng gi\u1eefa c\u00e1c d\u1ecbch v\u1ee5 n\u1ec1n t\u1ea3ng b\u1ea5t \u0111\u1ed3ng b\u1ed9.<\/p>\n
1. B\u1ed9 \u0111\u1ecbnh tuy\u1ebfn th\u00f4ng b\u00e1o \u0111\u1ea9y iOS<\/h3>\n
Nh\u00f3m c\u00e1c ki\u1ec3u gi\u00e1 tr\u1ecb d\u1eef li\u1ec7u tin nh\u1eafn, giao th\u1ee9c th\u00f4ng b\u00e1o v\u00e0 c\u00e1c b\u1ed9 \u0111\u1ecbnh tuy\u1ebfn d\u1ecbch v\u1ee5 c\u1ee5 th\u1ec3 \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh c\u1ea5u tr\u00fac x\u1eed l\u00fd n\u1ec1n:<\/p>\n
\n
\nSwift<\/span>
\n
\n<\/path><\/path><\/svg>
\nCh\u1ec9nh s\u1eeda Swift trong VPasCode<\/span>
\n<\/a>\n<\/div>\n
\n            
\r\n                                
\r\n                    Swift<\/span>\r\n                    \r\n                        <\/path><\/path><\/svg>\r\n                        Edit Swift in VPasCode<\/span>\r\n                    <\/a>\r\n                <\/div>\r\n                                
\r\n                    
import Foundation\r\n\r\npublic struct NotificationPayload {\r\n    public let title: String\r\n    public let body: String\r\n    public let categoryIdentifier: String\r\n    public let badgeCount: Int\r\n}\r\n\r\npublic protocol NotificationDispatcher {\r\n    func scheduleLocalNotification(payload: NotificationPayload, triggerInSeconds: TimeInterval)\r\n}\r\n\r\n\/\/ M\u1edf r\u1ed9ng giao th\u1ee9c cung c\u1ea5p h\u00e0nh vi m\u1eb7c \u0111\u1ecbnh\r\nextension NotificationDispatcher {\r\n    public func scheduleImmediate(payload: NotificationPayload) {\r\n        scheduleLocalNotification(payload: payload, triggerInSeconds: 1.0)\r\n    }\r\n}\r\n\r\npublic final class APNsDispatcher: NotificationDispatcher {\r\n    private let environment: String\r\n\r\n    public init(environment: String = \"production\") {\r\n        self.environment = environment\r\n    }\r\n\r\n    public func scheduleLocalNotification(payload: NotificationPayload, triggerInSeconds: TimeInterval) {\r\n        print(\"\u0110\u00e3 l\u00ean l\u1ecbch '(payload.title)' trong (triggerInSeconds)s th\u00f4ng qua APNs ((environment))\")\r\n    }\r\n}<\/code><\/pre>                <\/div>\r\n                
\r\n                    \r\n                        <\/path><\/path><\/svg>\r\n                        Edit Swift in VPasCode<\/span>\r\n                    <\/a>\r\n                <\/div>\r\n            <\/div>\r\n            \n<\/p><\/div>\n
\n
\n<\/path><\/path><\/svg>
\nCh\u1ec9nh s\u1eeda Swift trong VPasCode<\/span>
\n<\/a>\n<\/div>\n<\/div>\n
\"\"<\/p>\n
\u00a0<\/p>\n
C\u00e1c th\u1ef1c h\u00e0nh t\u1ed1t chi\u1ebfn l\u01b0\u1ee3c<\/h2>\n
    \n
  • \u01afu ti\u00ean ki\u1ec3u gi\u00e1 tr\u1ecb (struct) cho c\u00e1c m\u00f4 h\u00ecnh:<\/strong> S\u1eed d\u1ee5ng struct<\/code> \u0111\u1ec3 t\u1ea1o c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng truy\u1ec1n d\u1eef li\u1ec7u b\u1ea5t bi\u1ebfn v\u00e0 d\u1eef li\u1ec7u tr\u1ea1ng th\u00e1i, gi\u00fap c\u00e1c m\u00f4 h\u00ecnh lu\u00f4n an to\u00e0n v\u00e0 c\u00f3 th\u1ec3 d\u1ef1 \u0111o\u00e1n \u0111\u01b0\u1ee3c trong c\u00e1c s\u01a1 \u0111\u1ed3 tr\u1ef1c quan.<\/li>\n
  • X\u00e1c \u0111\u1ecbnh h\u1ee3p \u0111\u1ed3ng b\u1eb1ng giao th\u1ee9c:<\/strong> M\u00f4 h\u00ecnh c\u00e1c giao di\u1ec7n h\u00e0nh vi b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng protocol<\/code> c\u00e1c \u0111\u1ecbnh ngh\u0129a thay v\u00ec c\u00e1c c\u00e2y k\u1ebf th\u1eeba l\u1edbp s\u00e2u.<\/li>\n
  • T\u1eadn d\u1ee5ng c\u00e1c ki\u1ec3u li\u1ec7t k\u00ea v\u1edbi gi\u00e1 tr\u1ecb li\u00ean k\u1ebft:<\/strong> Bi\u1ec3u di\u1ec5n c\u00e1c k\u1ebft qu\u1ea3 tr\u1ea1ng th\u00e1i lo\u1ea1i tr\u1eeb l\u1eabn nhau (v\u00ed d\u1ee5: PurchaseResult<\/code>) b\u1eb1ng c\u00e1c ki\u1ec3u li\u1ec7t k\u00ea Swift \u0111\u1ec3 hi\u1ec3n th\u1ecb r\u00f5 r\u00e0ng m\u1ed1i quan h\u1ec7 gi\u1eefa c\u00e1c d\u1eef li\u1ec7u.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"
    Khi thi\u1ebft k\u1ebf \u1ee9ng d\u1ee5ng Swift cho iOS, macOS ho\u1eb7c ph\u00eda m\u00e1y ch\u1ee7, vi\u1ec7c \u0111\u1ecdc c\u00e1c khai b\u00e1o giao th\u1ee9c d\u00e0y \u0111\u1eb7c, c\u00e1c c\u1ea5u tr\u00fac ki\u1ec3u gi\u00e1 tr\u1ecb v\u00e0 c\u00e1c ph\u00e2n c\u1ea5p l\u1edbp ki\u1ec3u tham chi\u1ebfu c\u00f3 th\u1ec3 khi\u1ebfn vi\u1ec7c…<\/p>\n","protected":false},"author":3,"featured_media":0,"parent":0,"menu_order":13,"template":"","meta":{"inline_featured_image":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}}},"ld_collection":[14],"class_list":["post-2020","ld_docs","type-ld_docs","status-publish","hentry","ld_collection-vpascode-docs"],"yoast_head":"\nSwift 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