“`markdown
\n# \u524d\u8a00<\/p>\n
\u5728\u9019\u7bc7\u6587\u7ae0\u4e2d\uff0c\u6211\u5011\u5c07\u6df1\u5165\u63a2\u8a0e Swift \u4e2d\u7684\u65e5\u671f\u8655\u7406\uff0c\u7279\u5225\u662f\u5982\u4f55\u7372\u53d6\u7576\u524d\u661f\u671f\u5e7e\u4ee5\u53ca\u672c\u6708\u6709\u5e7e\u5929\u3002\u9019\u4e9b\u529f\u80fd\u5728\u64b0\u5beb\u65e5\u66c6\u61c9\u7528\u6216\u9032\u884c\u6642\u9593\u7d71\u8a08\u6642\u975e\u5e38\u5be6\u7528\u3002\u6211\u5011\u4e5f\u6703\u88dc\u5145\u4e00\u4e9b\u6700\u65b0\u7684\u8a9e\u6cd5\u8207\u6700\u4f73\u5be6\u8e10\uff0c\u8b93\u4f60\u7684\u7a0b\u5f0f\u78bc\u66f4\u52a0\u512a\u96c5\u8207\u9ad8\u6548\u3002<\/p>\n
# \u53d6\u5f97\u7576\u524d\u6642\u9593\u7684\u5b57\u4e32<\/p>\n
\u4ee5\u4e0b\u662f\u53d6\u5f97\u7576\u524d\u6642\u9593\u7684\u7c21\u55ae\u7bc4\u4f8b\u7a0b\u5f0f\u78bc\uff1a<\/p>\n
“`swift
\nlet currentDate = Date()
\nlet dateFormatter = DateFormatter()
\ndateFormatter.locale = Locale(identifier: “zh_Hant_TW”)
\ndateFormatter.dateFormat = “yyyy-MM-dd HH:mm:ss”
\nlet stringDate = dateFormatter.string(from: currentDate)
\nprint(“\u7576\u524d\u6642\u9593\uff1a\\(stringDate)”)
\n“`<\/p>\n
# Date \u8f49 String<\/p>\n
\u5982\u679c\u9700\u8981\u5c07 Date \u7269\u4ef6\u8f49\u63db\u70ba\u5b57\u4e32\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u51fd\u6578\uff1a<\/p>\n
“`swift
\nfunc dateToDateString(_ date: Date) -> String {
\n let timeZone = TimeZone.current
\n let formatter = DateFormatter()
\n formatter.timeZone = timeZone
\n formatter.dateFormat = “yyyy-MM-dd HH:mm:ss”
\n return formatter.string(from: date)
\n}
\n“`<\/p>\n
# String \u8f49 Date<\/p>\n
\u5c07\u5b57\u4e32\u8f49\u63db\u70ba Date \u7269\u4ef6\u7684\u51fd\u6578\u5982\u4e0b\uff1a<\/p>\n
“`swift
\nfunc timeStringToDate(_ dateStr: String) -> Date? {
\n let dateFormatter = DateFormatter()
\n dateFormatter.dateFormat = “yyyy-MM-dd HH:mm:ss”
\n return dateFormatter.date(from: dateStr)
\n}
\n“`<\/p>\n
# \u4eca\u5929\u661f\u671f\u5e7e<\/p>\n
\u8981\u7372\u53d6\u4eca\u5929\u662f\u661f\u671f\u5e7e\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u7a0b\u5f0f\u78bc\uff1a<\/p>\n
“`swift
\nlet currentDate = Date()
\nlet calendar = Calendar(identifier: .gregorian)
\nlet weekday = calendar.component(.weekday, from: currentDate)
\nprint(“\u4eca\u5929\u661f\u671f\uff1a\\(weekday)”) \/\/ 1 = \u661f\u671f\u65e5, 2 = \u661f\u671f\u4e00, … , 7 = \u661f\u671f\u516d
\n“`<\/p>\n
# \u672c\u6708\u6709\u5e7e\u5929<\/p>\n
\u8a08\u7b97\u7576\u524d\u6708\u4efd\u6709\u5e7e\u5929\u7684\u51fd\u6578\u5982\u4e0b\uff1a<\/p>\n
“`swift
\nfunc countOfDaysInCurrentMonth() -> Int {
\n let calendar = Calendar(identifier: .gregorian)
\n let range = calendar.range(of: .day, in: .month, for: Date())
\n return range?.count ?? 0
\n}
\n“`<\/p>\n
# \u5be6\u4f5c\u7bc4\u4f8b<\/p>\n
\u4f60\u53ef\u4ee5\u5c07\u4e0a\u8ff0\u7684\u6240\u6709\u51fd\u6578\u7d50\u5408\u5728\u4e00\u8d77\uff0c\u64b0\u5beb\u4e00\u500b\u7c21\u55ae\u7684\u61c9\u7528\u4f86\u986f\u793a\u7576\u524d\u6642\u9593\u3001\u661f\u671f\u5e7e\u4ee5\u53ca\u7576\u524d\u6708\u4efd\u7684\u5929\u6578\uff1a<\/p>\n
“`swift
\nlet currentDateString = dateToDateString(currentDate)
\nlet currentWeekday = calendar.component(.weekday, from: currentDate)
\nlet daysInMonth = countOfDaysInCurrentMonth()<\/p>\n
print(“\u7576\u524d\u6642\u9593\uff1a\\(currentDateString)”)
\nprint(“\u4eca\u5929\u662f\u661f\u671f\uff1a\\(currentWeekday)”)
\nprint(“\u672c\u6708\u6709\u5e7e\u5929\uff1a\\(daysInMonth)”)
\n“`<\/p>\n
# \u932f\u8aa4\u6392\u9664<\/p>\n
1. **\u65e5\u671f\u683c\u5f0f\u4e0d\u7b26**\uff1a\u78ba\u4fdd\u4f60\u50b3\u5165\u7684\u65e5\u671f\u5b57\u4e32\u683c\u5f0f\u6b63\u78ba\uff0c\u8207 `DateFormatter` \u8a2d\u5b9a\u7684\u683c\u5f0f\u4e00\u81f4\u3002
\n2. **\u6642\u9593\u5340\u57df\u554f\u984c**\uff1a\u5982\u679c\u6642\u9593\u986f\u793a\u4e0d\u6b63\u78ba\uff0c\u78ba\u8a8d `TimeZone` \u662f\u5426\u8a2d\u7f6e\u6b63\u78ba\u3002<\/p>\n
# \u5ef6\u4f38\u61c9\u7528<\/p>\n
\u9019\u4e9b\u57fa\u672c\u7684\u65e5\u671f\u8655\u7406\u529f\u80fd\u53ef\u4ee5\u61c9\u7528\u5728\u8a31\u591a\u5834\u666f\u4e2d\uff0c\u6bd4\u5982\u8aaa\uff1a
\n– \u751f\u6210\u65e5\u66c6\u61c9\u7528
\n– \u6578\u64da\u7d71\u8a08\u5831\u544a
\n– \u9810\u5b9a\u6d3b\u52d5\u7684\u8a08\u7b97<\/p>\n
\u9019\u4e9b\u90fd\u662f\u5229\u7528\u65e5\u671f\u8655\u7406\u7684\u57fa\u790e\u77e5\u8b58\u4f86\u64f4\u5c55\u7684\u5be6\u7528\u6848\u4f8b\u3002<\/p>\n
—<\/p>\n
<\/p>\n
## Q&A\uff08\u5e38\u898b\u554f\u984c\u89e3\u7b54\uff09<\/p>\n
**Q1: \u5982\u4f55\u66f4\u6539\u65e5\u671f\u683c\u5f0f\uff1f**
\nA1: \u4f60\u53ef\u4ee5\u4fee\u6539 `dateFormat` \u5c6c\u6027\uff0c\u4f8b\u5982\u8a2d\u5b9a\u70ba `”dd\/MM\/yyyy”` \u4f86\u986f\u793a\u70ba\u65e5\/\u6708\/\u5e74\u683c\u5f0f\u3002<\/p>\n
**Q2: \u70ba\u4ec0\u9ebc\u6211\u7684\u65e5\u671f\u8f49\u63db\u6703\u8fd4\u56de nil\uff1f**
\nA2: \u78ba\u4fdd\u4f60\u7684\u65e5\u671f\u5b57\u4e32\u683c\u5f0f\u8207 `DateFormatter` \u7684\u683c\u5f0f\u8a2d\u5b9a\u4e00\u81f4\uff0c\u4efb\u4f55\u4e0d\u5339\u914d\u90fd\u6703\u5c0e\u81f4\u8f49\u63db\u5931\u6557\u3002<\/p>\n
**Q3: \u5982\u4f55\u7372\u53d6\u7279\u5b9a\u65e5\u671f\u7684\u661f\u671f\u5e7e\uff1f**
\nA3: \u4f60\u53ef\u4ee5\u4f7f\u7528 `Calendar` \u7684 `component(_:from:)` \u65b9\u6cd5\uff0c\u5c07\u7279\u5b9a\u65e5\u671f\u50b3\u5165\u5373\u53ef\u7372\u5f97\u5c0d\u61c9\u7684\u661f\u671f\u5e7e\u3002
\n“`
\n—<\/p>\n","protected":false},"excerpt":{"rendered":"
let currentDate = Date()
\nlet dataFormatter = DateFormatter()
\ndataFormatter.locale = Locale(identifier: “zh_Hant_TW”)
\ndataFormatter.dateFormat = “YYYY-MM-dd HH:mm:ss”
\nlet stringDate = dataFormatter.string(from: currentDate)<\/p>\n","protected":false},"author":1,"featured_media":559,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"aside","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[5],"tags":[],"class_list":["post-382","post","type-post","status-publish","format-aside","has-post-thumbnail","hentry","category-swift","post_format-post-format-aside"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/badgameshow.com\/steven\/wp-content\/uploads\/2020\/11\/cup-1-1.png","jetpack-related-posts":[],"jetpack_shortlink":"https:\/\/wp.me\/pcFK27-6a","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/382","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=382"}],"version-history":[{"count":4,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/382\/revisions"}],"predecessor-version":[{"id":1071,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/382\/revisions\/1071"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/media\/559"}],"wp:attachment":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/media?parent=382"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/categories?post=382"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/tags?post=382"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}