<\/p>\n
Swift\u662f\u4e00\u7a2e\u5f37\u5927\u7684\u7a0b\u5f0f\u8a9e\u8a00\uff0c\u80fd\u5920\u8b93\u958b\u767c\u8005\u5feb\u901f\u958b\u767c\u51fa\u9ad8\u6548\u7387\u7684\u61c9\u7528\u7a0b\u5f0f\u3002\u5728Swift\u4e2d\uff0c\u5e8f\u5217\u5316\uff08Serialization\uff09\u548c\u53cd\u5e8f\u5217\u5316\uff08Deserialization\uff09\u662f\u4e00\u7a2e\u5e38\u898b\u4e14\u91cd\u8981\u7684\u6280\u8853\uff0c\u80fd\u5920\u5c07\u8cc7\u6599\u5f9e\u4e00\u7a2e\u683c\u5f0f\u8f49\u63db\u70ba\u53e6\u4e00\u7a2e\u683c\u5f0f\uff0c\u65b9\u4fbf\u5728\u4e0d\u540c\u7684\u74b0\u5883\u4e2d\u4f7f\u7528\u3002\u672c\u6587\u5c07\u6df1\u5165\u4ecb\u7d39\u5982\u4f55\u57282025\u5e74\u7248\u672c\u7684Swift\u4e2d\u4f7f\u7528\u5e8f\u5217\u5316\u548c\u53cd\u5e8f\u5217\u5316\uff0c\u5305\u62ec\u5982\u4f55\u4f7f\u7528Codable\u5354\u8b70\u4f86\u5be6\u73fe\u9019\u4e9b\u64cd\u4f5c\uff0c\u4ee5\u53ca\u5982\u4f55\u4f7f\u7528JSONEncoder\u548cJSONDecoder\u9032\u884c\u5be6\u969b\u7684\u6578\u64da\u8655\u7406\u3002<\/p>\n
Codable\u5354\u8b70\u662fSwift 4\u4e2d\u65b0\u589e\u7684\u529f\u80fd\uff0c\u9019\u4f7f\u5f97\u958b\u767c\u8005\u80fd\u5920\u8f15\u9b06\u5730\u5c07\u8cc7\u6599\u8f49\u63db\u70baJSON\u6216XML\u7b49\u683c\u5f0f\u3002\u8981\u4f7f\u7528Codable\u5354\u8b70\uff0c\u958b\u767c\u8005\u9996\u5148\u9700\u8981\u5c07\u5c0d\u8c61\u5b9a\u7fa9\u70baCodable\uff0c\u7136\u5f8c\u5be6\u73feencode\u548cdecode\u65b9\u6cd5\u3002<\/p>\n
### \u793a\u4f8b\uff1a\u4f7f\u7528Codable\u5354\u8b70<\/p>\n
\u4ee5\u4e0b\u662f\u4e00\u500b\u4f7f\u7528Codable\u5354\u8b70\u7684\u793a\u4f8b\uff1a<\/p>\n
“`swift
\nstruct Person: Codable {
\n let name: String
\n let age: Int
\n}<\/p>\n
let person = Person(name: “John”, age: 30)<\/p>\n
do {
\n let encoder = JSONEncoder()
\n let data = try encoder.encode(person)<\/p>\n
let decoder = JSONDecoder()
\n let decodedPerson = try decoder.decode(Person.self, from: data)
\n print(“\u89e3\u78bc\u5f8c\u7684\u5c0d\u8c61\uff1a\\(decodedPerson)”)
\n} catch {
\n print(“\u5e8f\u5217\u5316\u6216\u53cd\u5e8f\u5217\u5316\u904e\u7a0b\u4e2d\u51fa\u73fe\u932f\u8aa4\uff1a\\(error)”)
\n}
\n“`<\/p>\n
\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c\u6211\u5011\u5b9a\u7fa9\u4e86\u4e00\u500b`Person`\u7d50\u69cb\uff0c\u4e26\u5c07\u5176\u5b9a\u7fa9\u70baCodable\u3002\u7136\u5f8c\uff0c\u6211\u5011\u4f7f\u7528`JSONEncoder`\u5c07`Person`\u5c0d\u8c61\u7de8\u78bc\u70baJSON\u683c\u5f0f\uff0c\u4e26\u4f7f\u7528`JSONDecoder`\u5c07JSON\u8cc7\u6599\u53cd\u5e8f\u5217\u5316\u70ba`Person`\u5c0d\u8c61\u3002\u6b64\u5916\uff0c\u6211\u5011\u6dfb\u52a0\u4e86\u932f\u8aa4\u8655\u7406\u4f86\u6355\u7372\u53ef\u80fd\u51fa\u73fe\u7684\u7570\u5e38\u60c5\u6cc1\u3002<\/p>\n
`JSONEncoder`\u548c`JSONDecoder`\u662fSwift\u4e2d\u7528\u65bc\u5e8f\u5217\u5316\u548c\u53cd\u5e8f\u5217\u5316\u7684\u5169\u500b\u6838\u5fc3\u985e\u5225\u3002\u9019\u5169\u8005\u63d0\u4f9b\u4e86\u7c21\u55ae\u800c\u6709\u6548\u7684\u65b9\u5f0f\u4f86\u8655\u7406JSON\u683c\u5f0f\u7684\u6578\u64da\u3002<\/p>\n
### \u793a\u4f8b\uff1aJSON\u6578\u64da\u8655\u7406<\/p>\n
\u4ee5\u4e0b\u662f\u4e00\u500b\u66f4\u8907\u96dc\u7684\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u4f7f\u7528`JSONEncoder`\u548c`JSONDecoder`\u4f86\u8655\u7406\u5305\u542b\u591a\u500b\u5c0d\u8c61\u7684\u6578\u64da\uff1a<\/p>\n
“`swift
\nstruct Group: Codable {
\n let name: String
\n let members: [Person]\n}<\/p>\n
let group = Group(name: “Developers”, members: [person])<\/p>\n
do {
\n let encoder = JSONEncoder()
\n let data = try encoder.encode(group)<\/p>\n
let decoder = JSONDecoder()
\n let decodedGroup = try decoder.decode(Group.self, from: data)
\n print(“\u89e3\u78bc\u5f8c\u7684\u7fa4\u7d44\uff1a\\(decodedGroup.name)\uff0c\u6210\u54e1\u6578\u91cf\uff1a\\(decodedGroup.members.count)”)
\n} catch {
\n print(“\u5e8f\u5217\u5316\u6216\u53cd\u5e8f\u5217\u5316\u904e\u7a0b\u4e2d\u51fa\u73fe\u932f\u8aa4\uff1a\\(error)”)
\n}
\n“`<\/p>\n
\u5728\u9019\u6bb5\u7a0b\u5f0f\u78bc\u4e2d\uff0c\u6211\u5011\u5b9a\u7fa9\u4e86\u4e00\u500b`Group`\u7d50\u69cb\uff0c\u5305\u542b\u4e00\u500b`name`\u5c6c\u6027\u548c\u4e00\u500b`members`\u5c6c\u6027\uff0c\u5f8c\u8005\u662f\u4e00\u500b`Person`\u5c0d\u8c61\u7684\u6578\u7d44\u3002\u9019\u6a23\u7684\u8a2d\u8a08\u4f7f\u5f97\u6211\u5011\u80fd\u5920\u8f15\u9b06\u7ba1\u7406\u96c6\u5408\u6578\u64da\u3002<\/p>\n
\u5728\u5be6\u969b\u958b\u767c\u4e2d\uff0c\u5e8f\u5217\u5316\u548c\u53cd\u5e8f\u5217\u5316\u7684\u904e\u7a0b\u4e2d\u53ef\u80fd\u6703\u9047\u5230\u5404\u7a2e\u932f\u8aa4\uff0c\u5982\u8cc7\u6599\u683c\u5f0f\u4e0d\u6b63\u78ba\u3001\u985e\u578b\u4e0d\u5339\u914d\u7b49\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u898b\u7684\u932f\u8aa4\u53ca\u5176\u89e3\u6c7a\u65b9\u6cd5\uff1a<\/p>\n
– **\u8cc7\u6599\u683c\u5f0f\u4e0d\u6b63\u78ba**\uff1a\u6aa2\u67e5JSON\u5b57\u4e32\u662f\u5426\u7b26\u5408\u683c\u5f0f\u898f\u7bc4\uff0c\u53ef\u4ee5\u4f7f\u7528\u7dda\u4e0aJSON\u9a57\u8b49\u5de5\u5177\u9032\u884c\u6aa2\u67e5\u3002
\n– **\u985e\u578b\u4e0d\u5339\u914d**\uff1a\u78ba\u4fddJSON\u4e2d\u7684\u8cc7\u6599\u985e\u578b\u8207Codable\u7d50\u69cb\u4e2d\u7684\u5c6c\u6027\u985e\u578b\u76f8\u7b26\u3002
\n– **\u7f3a\u5c11\u5fc5\u9808\u7684\u5c6c\u6027**\uff1a\u5728Codable\u7d50\u69cb\u4e2d\u6a19\u8a3b`CodingKeys`\uff0c\u4ee5\u78ba\u4fdd\u6240\u6709\u5fc5\u9700\u5c6c\u6027\u5747\u88ab\u6b63\u78ba\u7de8\u78bc\u548c\u89e3\u78bc\u3002<\/p>\n
\u5728\u672c\u6587\u4e2d\uff0c\u6211\u5011\u4ecb\u7d39\u4e86\u5982\u4f55\u57282025\u5e74\u7248\u672c\u7684Swift\u4e2d\u4f7f\u7528\u5e8f\u5217\u5316\u548c\u53cd\u5e8f\u5217\u5316\uff0c\u5305\u62ec\u5982\u4f55\u5229\u7528Codable\u5354\u8b70\u3001JSONEncoder\u548cJSONDecoder\u9032\u884c\u8cc7\u6599\u8655\u7406\u3002\u638c\u63e1\u9019\u4e9b\u6280\u8853\u53ef\u4ee5\u5e6b\u52a9\u958b\u767c\u8005\u8f15\u9b06\u5730\u5c07\u8cc7\u6599\u5f9e\u4e00\u7a2e\u683c\u5f0f\u8f49\u63db\u70ba\u53e6\u4e00\u7a2e\u683c\u5f0f\uff0c\u4ee5\u4fbf\u5728\u4e0d\u540c\u7684\u74b0\u5883\u4e2d\u4f7f\u7528\uff0c\u63d0\u5347\u61c9\u7528\u7a0b\u5f0f\u7684\u9748\u6d3b\u6027\u548c\u53ef\u64f4\u5c55\u6027\u3002<\/p>\n
**Q1: Swift\u4e2d\u7684Codable\u5354\u8b70\u662f\u5982\u4f55\u904b\u4f5c\u7684\uff1f**
\nA1: Codable\u5354\u8b70\u7d50\u5408\u4e86Encodable\u548cDecodable\u5354\u8b70\uff0c\u5141\u8a31\u5c0d\u8c61\u81ea\u52d5\u7de8\u78bc\u70baJSON\u6216\u5176\u4ed6\u683c\u5f0f\uff0c\u540c\u6642\u4e5f\u652f\u6301\u5f9e\u9019\u4e9b\u683c\u5f0f\u53cd\u5e8f\u5217\u5316\u70ba\u5c0d\u8c61\u3002<\/p>\n
**Q2: \u5728\u5e8f\u5217\u5316\u904e\u7a0b\u4e2d\u5982\u4f55\u8655\u7406\u932f\u8aa4\uff1f**
\nA2: \u4f7f\u7528`do-catch`\u8a9e\u53e5\u4f86\u6355\u7372\u548c\u8655\u7406\u5728\u7de8\u78bc\u6216\u89e3\u78bc\u904e\u7a0b\u4e2d\u53ef\u80fd\u51fa\u73fe\u7684\u932f\u8aa4\uff0c\u9019\u80fd\u5e6b\u52a9\u958b\u767c\u8005\u9032\u884c\u932f\u8aa4\u6392\u9664\u3002<\/p>\n
**Q3: \u70ba\u4ec0\u9ebc\u9078\u64c7JSON\u4f5c\u70ba\u6578\u64da\u683c\u5f0f\uff1f**
\nA3: JSON\u662f\u4e00\u7a2e\u8f15\u91cf\u7d1a\u7684\u8cc7\u6599\u4ea4\u63db\u683c\u5f0f\uff0c\u6613\u65bc\u95b1\u8b80\u548c\u7de8\u5beb\uff0c\u4e26\u4e14\u88ab\u5ee3\u6cdb\u652f\u6301\u65bc\u5404\u7a2e\u7de8\u7a0b\u8a9e\u8a00\u548c\u5e73\u53f0\uff0c\u4f7f\u5176\u6210\u70ba\u6578\u64da\u50b3\u8f38\u7684\u7406\u60f3\u9078\u64c7\u3002
\n—<\/p>\n","protected":false},"excerpt":{"rendered":"
\u6587\u7ae0\u6458\u8981\uff1a\u672c\u6587\u5c07\u4ecb\u7d39\u5982\u4f55\u4f7f\u7528Swift\u4e2d\u7684\u5e8f\u5217\u5316\u548c\u53cd\u5e8f\u5217\u5316\uff0c\u5305\u62ec\u4f7f\u7528Codable\u5354\u8b70\u5b9e\u73b0\u5e8f\u5217\u5316\u548c\u53cd\u5e8f\u5217\u5316\uff0c\u4ee5\u53ca\u4f7f\u7528JSONEncoder\u548cJSONDecoder\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-3899","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\/pcFK27-10T","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/3899","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=3899"}],"version-history":[{"count":2,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/3899\/revisions"}],"predecessor-version":[{"id":3921,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/3899\/revisions\/3921"}],"wp:attachment":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/media?parent=3899"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/categories?post=3899"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/tags?post=3899"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}