{"id":3917,"date":"2025-05-30T11:26:56","date_gmt":"2025-06-05T03:47:55","guid":{"rendered":"https:\/\/badgameshow.com\/steven\/?p=3917"},"modified":"2025-06-05T11:26:56","modified_gmt":"2025-06-05T03:47:55","slug":"%e5%ad%b8%e7%bf%92%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8swift%e4%b8%ad%e7%9a%84%e6%95%b8%e6%93%9a%e5%ad%98%e5%84%b2","status":"publish","type":"post","link":"https:\/\/badgameshow.com\/steven\/swift\/%e5%ad%b8%e7%bf%92%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8swift%e4%b8%ad%e7%9a%84%e6%95%b8%e6%93%9a%e5%ad%98%e5%84%b2\/","title":{"rendered":"2025 \u5e74\u6700\u65b0 Swift \u7a0b\u5f0f\u6559\u5b78\uff1a\u5982\u4f55\u4f7f\u7528 UserDefaults \u548c SQLite \u9032\u884c\u6578\u64da\u5b58\u5132"},"content":{"rendered":"

<\/p>\n

2025 \u5e74\u6700\u65b0 Swift \u7a0b\u5f0f\u6559\u5b78\uff1a\u5982\u4f55\u4f7f\u7528 UserDefaults \u548c SQLite \u9032\u884c\u6578\u64da\u5b58\u5132<\/h1>\n

\u5728 Swift \u4e2d\uff0c\u6211\u5011\u53ef\u4ee5\u4f7f\u7528\u591a\u7a2e\u65b9\u6cd5\u4f86\u5be6\u73fe\u61c9\u7528\u7a0b\u5e8f\u7684\u6578\u64da\u6301\u4e45\u5316\u3002\u672c\u6587\u5c07\u6df1\u5165\u4ecb\u7d39\u5982\u4f55\u4f7f\u7528 **UserDefaults** \u985e\u4f86\u5be6\u73fe\u504f\u597d\u8a2d\u5b9a\u5b58\u5132\uff0c\u4ee5\u53ca\u5982\u4f55\u5229\u7528 **SQLite** \u6578\u64da\u5eab\u9032\u884c\u66f4\u8907\u96dc\u7684\u6578\u64da\u6301\u4e45\u5316\u3002<\/p>\n

\u4f7f\u7528 UserDefaults \u985e\u5be6\u73fe\u504f\u597d\u8a2d\u5b9a\u5b58\u5132<\/h2>\n

**UserDefaults** \u985e\u662f\u4e00\u500b\u7c21\u55ae\u800c\u9ad8\u6548\u7684\u65b9\u5f0f\u4f86\u5b58\u5132\u61c9\u7528\u7a0b\u5e8f\u7684\u57fa\u672c\u504f\u597d\u8a2d\u5b9a\u3002\u5b83\u80fd\u5132\u5b58\u57fa\u672c\u6578\u64da\u985e\u578b\uff0c\u5982\u6574\u6578\u3001\u6d6e\u9ede\u6578\u3001\u5b57\u4e32\u548c\u5e03\u6797\u503c\uff0c\u751a\u81f3\u53ef\u4ee5\u5b58\u5132\u81ea\u5b9a\u7fa9\u5c0d\u8c61\uff08\u9700\u9075\u5faa NSCoding \u5354\u8b70\uff09\u3002<\/p>\n

\u8981\u4f7f\u7528 UserDefaults\uff0c\u9996\u5148\u9700\u8981\u5275\u5efa\u4e00\u500b UserDefaults \u5c0d\u8c61\uff1a<\/p>\n

“`swift
\nlet defaults = UserDefaults.standard
\n“`<\/p>\n

\u63a5\u4e0b\u4f86\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528 `set` \u65b9\u6cd5\u4f86\u5132\u5b58\u504f\u597d\u8a2d\u5b9a\uff1a<\/p>\n

“`swift
\ndefaults.set(“John Doe”, forKey: “name”)
\ndefaults.set(25, forKey: “age”)
\ndefaults.set(true, forKey: “isMarried”)
\n“`<\/p>\n

\u8981\u8b80\u53d6\u9019\u4e9b\u504f\u597d\u8a2d\u5b9a\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528 `object(forKey:)` \u65b9\u6cd5\uff1a<\/p>\n

“`swift
\nlet name = defaults.string(forKey: “name”) ?? “Unknown”
\nlet age = defaults.integer(forKey: “age”)
\nlet isMarried = defaults.bool(forKey: “isMarried”)
\n“`<\/p>\n

\u6b64\u5916\uff0cUserDefaults \u9084\u63d0\u4f9b\u4e86\u65b9\u6cd5\u4f86\u6aa2\u67e5\u504f\u597d\u8a2d\u5b9a\u662f\u5426\u5b58\u5728\uff0c\u4ee5\u53ca\u522a\u9664\u504f\u597d\u8a2d\u5b9a\uff1a<\/p>\n

“`swift
\nif defaults.object(forKey: “name”) != nil {
\n print(“Name exists”)
\n} else {
\n print(“Name does not exist”)
\n}
\n“`<\/p>\n

\u4f7f\u7528 SQLite \u6578\u64da\u5eab\u5be6\u73fe\u6578\u64da\u6301\u4e45\u5316<\/h2>\n

**SQLite** \u662f\u4e00\u7a2e\u8f15\u91cf\u7d1a\u7684\u958b\u6e90\u95dc\u806f\u6578\u64da\u5eab\uff0c\u975e\u5e38\u9069\u5408\u7528\u65bc\u79fb\u52d5\u61c9\u7528\u7a0b\u5e8f\u3002\u5b83\u53ef\u4ee5\u5728 iOS \u7b49\u591a\u500b\u5e73\u53f0\u4e0a\u4f7f\u7528\uff0c\u4e26\u4e14\u53ef\u4ee5\u7121\u7e2b\u96c6\u6210\u5230 Swift \u61c9\u7528\u7a0b\u5e8f\u4e2d\u3002<\/p>\n

\u8981\u4f7f\u7528 SQLite\uff0c\u9996\u5148\u9700\u8981\u5275\u5efa\u4e00\u500b\u6578\u64da\u5eab\u9023\u63a5\uff1a<\/p>\n

“`swift
\nimport SQLite<\/p>\n

let db = try! Connection(“path\/to\/db.sqlite3”)
\n“`<\/p>\n

\u63a5\u4e0b\u4f86\uff0c\u53ef\u4ee5\u4f7f\u7528 `createTable` \u65b9\u6cd5\u4f86\u5275\u5efa\u4e00\u500b\u8868\uff1a<\/p>\n

“`swift
\nlet users = Table(“users”)
\nlet id = Expression(“id”)
\nlet name = Expression(“name”)
\nlet age = Expression(“age”)
\nlet isMarried = Expression(“isMarried”)<\/p>\n

try db.run(users.create(ifNotExists: true) { t in
\n t.column(id, primaryKey: true)
\n t.column(name)
\n t.column(age)
\n t.column(isMarried)
\n})
\n“`<\/p>\n

\u63d2\u5165\u6578\u64da\u4f7f\u7528 `insert` \u65b9\u6cd5\uff1a<\/p>\n

“`swift
\nlet user = User(name: “John Doe”, age: 25, isMarried: true)
\ntry db.run(users.insert(name <- user.name, age <- user.age, isMarried <- user.isMarried))\n```\n\n\u8981\u8b80\u53d6\u6578\u64da\uff0c\u53ef\u4ee5\u4f7f\u7528 `select` \u65b9\u6cd5\uff1a\n\n```swift\nlet query = users.select(id, name, age, isMarried)\nfor user in try db.prepare(query) {\n let id = user[id]\n let name = user[name]\n let age = user[age]\n let isMarried = user[isMarried]\n print(\"User ID: \\(id), Name: \\(name), Age: \\(age), Married: \\(isMarried)\")\n}\n```\n\nSQLite \u9084\u63d0\u4f9b\u4e86\u66f4\u65b0\u548c\u522a\u9664\u6578\u64da\u7684\u65b9\u6cd5\uff0c\u4f7f\u5176\u6210\u70ba\u4e00\u500b\u5f37\u5927\u7684\u6578\u64da\u7ba1\u7406\u5de5\u5177\u3002\n\n\n\n

\u7e3d\u7d50<\/h2>\n

\u672c\u6587\u4ecb\u7d39\u4e86\u5982\u4f55\u4f7f\u7528 Swift \u4e2d\u7684\u6578\u64da\u5b58\u5132\u6280\u8853\uff0c\u5305\u62ec\u5982\u4f55\u4f7f\u7528 UserDefaults \u4f86\u5132\u5b58\u7528\u6236\u504f\u597d\u8a2d\u5b9a\uff0c\u4ee5\u53ca\u5982\u4f55\u5229\u7528 SQLite \u6578\u64da\u5eab\u9032\u884c\u6578\u64da\u6301\u4e45\u5316\u3002\u638c\u63e1\u9019\u4e9b\u6280\u8853\u80fd\u5920\u5e6b\u52a9\u60a8\u958b\u767c\u51fa\u66f4\u52a0\u7a69\u5b9a\u548c\u53ef\u9760\u7684\u61c9\u7528\u7a0b\u5e8f\uff0c\u63d0\u5347\u7528\u6236\u9ad4\u9a57\u3002<\/p>\n

\u5e38\u898b\u554f\u984c\u89e3\u7b54\uff08Q&A\uff09<\/h2>\n

**Q1: UserDefaults \u548c SQLite \u6709\u4ec0\u9ebc\u5340\u5225\uff1f**
\nA1: UserDefaults \u9069\u5408\u5b58\u5132\u5c0f\u578b\u7684\u7528\u6236\u8a2d\u7f6e\u548c\u57fa\u672c\u6578\u64da\uff0c\u800c SQLite \u66f4\u9069\u5408\u5b58\u5132\u5927\u91cf\u7d50\u69cb\u5316\u6578\u64da\u548c\u9700\u8981\u8907\u96dc\u67e5\u8a62\u7684\u6578\u64da\u3002<\/p>\n

**Q2: \u5982\u4f55\u5728 UserDefaults \u4e2d\u5132\u5b58\u81ea\u5b9a\u7fa9\u5c0d\u8c61\uff1f**
\nA2: \u60a8\u9700\u8981\u4f7f\u81ea\u5b9a\u7fa9\u5c0d\u8c61\u9075\u5faa NSCoding \u5354\u8b70\uff0c\u7136\u5f8c\u5c07\u5c0d\u8c61\u7de8\u78bc\u70ba Data \u683c\u5f0f\uff0c\u6700\u5f8c\u4f7f\u7528 `set(_:forKey:)` \u65b9\u6cd5\u5132\u5b58\u3002<\/p>\n

**Q3: \u5728 SQLite \u4e2d\u5982\u4f55\u8655\u7406\u6578\u64da\u66f4\u65b0\uff1f**
\nA3: \u4f7f\u7528 `update` \u65b9\u6cd5\u53ef\u4ee5\u66f4\u65b0\u8868\u4e2d\u7684\u6578\u64da\uff0c\u5177\u9ad4\u5be6\u73fe\u6703\u6839\u64da\u60a8\u7684\u6578\u64da\u7d50\u69cb\u800c\u6709\u6240\u4e0d\u540c\u3002<\/p>\n

—<\/p>\n","protected":false},"excerpt":{"rendered":"

\u6587\u7ae0\u6458\u8981\uff1a\u672c\u6587\u5c07\u4ecb\u7d39\u5982\u4f55\u4f7f\u7528Swift\u4e2d\u7684\u6578\u64da\u5b58\u5132\uff0c\u5305\u62ec\u5982\u4f55\u4f7f\u7528UserDefaults\u7c7b\u4f86\u5be6\u73fe\u504f\u597d\u8a2d\u7f6e\u5b58\u5132\u3001\u5982\u4f55\u4f7f\u7528SQLite\u6578\u64da\u5eab\u4f86\u5be6\u73fe\u6578\u64da\u6301\u4e45\u5316\u7b49\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[174,5],"tags":[173,9],"class_list":["post-3917","post","type-post","status-publish","format-standard","hentry","category-ios","category-swift","tag-ios","tag-swift"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack-related-posts":[],"jetpack_shortlink":"https:\/\/wp.me\/pcFK27-11b","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/3917","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/comments?post=3917"}],"version-history":[{"count":1,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/3917\/revisions"}],"predecessor-version":[{"id":3918,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/3917\/revisions\/3918"}],"wp:attachment":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/media?parent=3917"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/categories?post=3917"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/tags?post=3917"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}