{"id":34872,"date":"2021-08-01T08:07:19","date_gmt":"1970-01-01T00:00:00","guid":{"rendered":"http:\/\/www.sejuku.net\/blog\/?p=34872"},"modified":"2024-05-06T11:45:18","modified_gmt":"2024-05-06T02:45:18","slug":"%e3%80%90swift%e5%85%a5%e9%96%80%e3%80%91%e6%95%b0%e5%80%a4%e3%82%92%e6%96%87%e5%ad%97%e5%88%97string%e3%81%abformat%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/www.sejuku.net\/blog\/34872","title":{"rendered":"\u3010Swift\u5165\u9580\u3011\u6570\u5024\u3092\u6587\u5b57\u5217(String)\u306bformat\u3059\u308b\u65b9\u6cd5"},"content":{"rendered":"<p>\u6570\u5024\u306e\u6841\u6570\u3092\u6307\u5b9a\u3057\u305f\u6841\u3067\u63c3\u3048\u305f\u3044\u3068\u304d\u306b\u306f<span style=\"color: #339966;\"><strong>format<\/strong><\/span>\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001<\/p>\n<p><span style=\"color: #ff0000;\"><strong>\u30fbformat\u3068\u306f<br \/>\n\u30fb\u6841\u6570\u3092\u6307\u5b9a\u3059\u308b\u65b9\u6cd5(0\u57cb\u3081)<br \/>\n\u30fb\u6841\u6570\u3092\u6307\u5b9a\u3059\u308b\u65b9\u6cd5(\u7a7a\u767d\u57cb\u3081)<\/strong><\/span><\/p>\n<p>\u3068\u3044\u3046format\u306e\u57fa\u672c\u7684\u306a\u89e3\u8aac\u304b\u3089\u3001<\/p>\n<p><span style=\"color: #ff0000;\"><strong>\u30fb\u5c0f\u6570\u70b9\u306e\u6841\u6570\u3092\u63c3\u3048\u308b\u65b9\u6cd5<br \/>\n\u30fb\u65e5\u4ed8\u3092\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3059\u308b\u65b9\u6cd5\uff08DateFormatter\uff09<\/strong><\/span><\/p>\n<p>\u306a\u3069\u306e\u5fdc\u7528\u7684\u306a\u4f7f\u3044\u65b9\u306b\u95a2\u3057\u3066\u3082\u89e3\u8aac\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n<p>\u4eca\u56de\u306f\u305d\u3093\u306a<span style=\"color: #ff0000; background-color: #ffff99;\"><strong>\u6841\u6570\u3092\u305d\u308d\u3048\u308bformat\u306e\u4f7f\u3044\u65b9\u306b\u3064\u3044\u3066\u308f\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac\u3057\u307e\u3059\uff01<br \/>\n<\/strong><\/span><br \/>\n\u203b\u3053\u306e\u8a18\u4e8b\u3067\u306fSwift4.0\u3092\u4f7f\u7528\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<h2>format\u3068\u306f<\/h2>\n<p><span style=\"color: #339966;\"><strong>format\uff08\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\uff09<\/strong><\/span>\u306f\u3001\u6570\u5024\u306e\u6841\u6570\u30920\u3067\u63c3\u3048\u305f\u3044\u3068\u304d\u306b\u4f7f\u7528\u3057\u307e\u3059\u3002<\/p>\n<p>\u4f8b\u3048\u3070\u6570\u5024\u3084\u5e74\u6708\u65e5\u306a\u3069\u306e\u8868\u793a\u6841\u6570\u304c\u4e0d\u63c3\u3044\u3067<span style=\"color: #0000ff;\"><strong>\u8868\u793a\u3092\u5408\u308f\u305b\u305f\u3044\u3068\u304d\u306bformat\u3092\u4f7f\u7528\u3059\u308b\u3068\u4fbf\u5229<\/strong><\/span>\u3067\u3059\u3002<\/p>\n<p>format\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u8a18\u8ff0\u3057\u307e\u3059\u3002<\/p>\n<p><strong>\u66f8\u304d\u65b9\uff1a<\/strong><\/p>\n<pre class=\"striped:false marking:false ranges:false nums:false nums-toggle:false lang:default decode:true \" >String(format: \u201c\u6841\u6570\u6307\u5b9a\u201d, \u5024)<\/pre>\n<p>\u7b2c\u4e00\u5f15\u6570\u306b<span style=\"color: #339966;\"><strong>format:<\/strong><\/span>\u3092\u8a18\u8ff0\u3057\u3001\u6841\u6570\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002<br \/>\n\u7b2c\u4e8c\u5f15\u6570\u306b\u306f\u6841\u6570\u3092\u63c3\u3048\u305f\u3044\u5024\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002<\/p>\n<h2>format\u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9<\/h2>\n<h3>\u6841\u6570\u306e\u6307\u5b9a(0\u57cb\u3081)<\/h3>\n<p>\u3053\u3053\u3067\u306f\u5b9f\u969b\u306bformat\u306e\u4f7f\u3044\u65b9\u3092\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>\u6570\u5024\u30925\u6841\u3067\u63c3\u3048\u305f\u3044\u5834\u5408\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u8a18\u8ff0\u3057\u307e\u3059\u3002<\/p>\n<p><strong>0\u30925\u6841\u3067\u63c3\u3048\u308b<\/strong><\/p>\n<pre class=\"lang:swift decode:true \" >print(String(format: &quot;%05d&quot;, 1))\r\nprint(String(format: &quot;%05d&quot;, 10))\r\nprint(String(format: &quot;%05d&quot;, 100))\r\nprint(String(format: &quot;%05d&quot;, 1000))\r\nprint(String(format: &quot;%05d&quot;, 10000))<\/pre>\n<p><strong>\u5b9f\u884c\u7d50\u679c\uff1a<\/strong><\/p>\n<pre class=\"striped:false marking:false ranges:false nums:false nums-toggle:false lang:default decode:true \" >00001\r\n00010\r\n00100\r\n01000\r\n10000<\/pre>\n<p>format:\u3067\u6307\u5b9a\u3057\u305f&#8221;%05d&#8221;\u306f\u30010\u3092\u5de6\u5bc4\u305b\u30675\u6841\u5206\u57cb\u3081\u3066\u3044\u304f\u51e6\u7406\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u65e2\u306b\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3059\u308b\u5024\u304c<span style=\"color: #ff0000;\"><strong>\u6307\u5b9a\u3057\u305f\u6841\u6570\u3068\u540c\u3058\u307e\u305f\u306f\u305d\u308c\u4ee5\u4e0a\u306e\u5834\u5408\u306f0\u57cb\u3081\u306f\u884c\u308f\u308c\u307e\u305b\u3093\u3002<\/strong><\/span><\/p>\n<p>\u5b9f\u4f8b\u3068\u3057\u3066\u3001\u4f8b\u3048\u3070\u5e74\u6708\u65e5\u6642\u306e\u6841\u6570\u3092\u63c3\u3048\u305f\u3044\u3068\u304d\u306e\u30b5\u30f3\u30d7\u30eb\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n<p><strong>\u5e74\u6708\u65e5\u6642\u306e\u6841\u6570\u3092\u63c3\u3048\u308b<\/strong><\/p>\n<pre class=\"lang:swift decode:true \" >let year = 2017\r\nlet month = 7\r\nlet day = 4\r\nlet hour = 2\r\nlet min = 6\r\n        \r\n\/\/\u6841\u6570\u3092\u63c3\u3048\u308b\r\nlet zeroFillmonth = String(format: &quot;%02d&quot;, month)\r\nlet zeroFillday = String(format: &quot;%02d&quot;, day)\r\nlet zeroFillhour = String(format: &quot;%02d&quot;, hour)\r\nlet zeroFillmin = String(format: &quot;%02d&quot;, min)\r\n        \r\n\/\/\u6587\u5b57\u5217\u3092\u7d50\u5408\u3059\u308b\r\nlet date = String(year) + &quot;\/&quot; +\r\nzeroFillmonth + zeroFillday + &quot;\/&quot; +\r\nzeroFillhour  + zeroFillmin\r\n        \r\nprint(date);<\/pre>\n<p><strong>\u5b9f\u884c\u7d50\u679c\uff1a<\/strong><\/p>\n<pre class=\"striped:false marking:false ranges:false nums:false nums-toggle:false lang:default decode:true \" >2017\/0704\/0206<\/pre>\n<h3>\u6841\u6570\u306e\u6307\u5b9a(\u7a7a\u767d\u57cb\u3081)<\/h3>\n<p>0\u306e\u4ee3\u308f\u308a\u306b<span style=\"color: #0000ff;\"><strong>\u7a7a\u767d\u3092\u6307\u5b9a\u3057\u305f\u3044\u5834\u5408<\/strong><\/span>\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u8a18\u8ff0\u3057\u307e\u3059\u3002<\/p>\n<p><strong>\u7a7a\u767d\u3067\u63c3\u3048\u308b<\/strong><\/p>\n<pre class=\"lang:swift decode:true \" >print(String(format: &quot;%5d&quot;, 1))\r\nprint(String(format: &quot;%5d&quot;, 10))\r\nprint(String(format: &quot;%5d&quot;, 100))\r\nprint(String(format: &quot;%5d&quot;, 1000))\r\nprint(String(format: &quot;%5d&quot;, 10000))<\/pre>\n<p><strong>\u5b9f\u884c\u7d50\u679c\uff1a<\/strong><\/p>\n<pre class=\"striped:false marking:false ranges:false nums:false nums-toggle:false lang:default decode:true \" >    1\r\n   10\r\n  100\r\n 1000\r\n10000<\/pre>\n<h3>\u5c0f\u6570\u70b9\u306e\u6841\u6570\u3092\u63c3\u3048\u308b<\/h3>\n<p>\u5c0f\u6570\u70b9\u4ee5\u4e0b\u306e\u6841\u6570\u3092\u63c3\u3048\u305f\u3044\u5834\u5408\u306f<span style=\"color: #339966;\"><strong>\u300c%.5f\u300d<\/strong><\/span>\u306e\u3088\u3046\u306b\u6307\u5b9a\u3057\u307e\u3059\u3002<\/p>\n<p>\u6574\u6570\u306e\u5834\u5408\u3068\u540c\u69d8\u6307\u5b9a\u3057\u305f\u6841\u6570\u3068\u540c\u3058\u3001\u307e\u305f\u306f\u305d\u308c\u4ee5\u4e0a\u306e\u5834\u5408\u306f0\u57cb\u3081\u306f\u884c\u308f\u308c\u307e\u305b\u3093\u3002<\/p>\n<p><strong>\u5c0f\u6570\u70b9\u4ee5\u4e0b\u306e\u6841\u6570\u3092\u63c3\u3048\u308b<\/strong><\/p>\n<pre class=\"lang:swift decode:true \" >print(String(format: &quot;%.5f&quot;, 10.1))\r\nprint(String(format: &quot;%.5f&quot;, 10.12))\r\nprint(String(format: &quot;%.5f&quot;, 10.123))\r\nprint(String(format: &quot;%.5f&quot;, 10.1234))\r\nprint(String(format: &quot;%.5f&quot;, 10.123456789))<\/pre>\n<p><strong>\u5b9f\u884c\u7d50\u679c\uff1a<\/strong><\/p>\n<pre class=\"striped:false marking:false ranges:false nums:false nums-toggle:false lang:default decode:true \" >\r\n10.10000\r\n10.12000\r\n10.12300\r\n10.12340\r\n10.12346<\/pre>\n<h2>\u65e5\u4ed8\u3092\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3059\u308b\uff08DateFormatter\uff09<\/h2>\n<p>\u65e5\u4ed8\u3092\u6307\u5b9a\u3057\u305f\u66f8\u5f0f\u3067\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3059\u308b\u306b\u306f<span style=\"color: #339966;\"><strong>DateFormatter<\/strong><\/span>\u30af\u30e9\u30b9\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002<\/p>\n<p>\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3059\u308b\u306b\u306fDateFormatter\u30af\u30e9\u30b9\u306e<span style=\"color: #339966;\"><strong>dateFormat<\/strong><\/span>\u3092\u4f7f\u7528\u3057\u3001<strong>yyyymmdd<\/strong>\u306a\u3069\u306e\u65e5\u4ed8\u306e\u66f8\u5f0f\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002<\/p>\n<p>\u4ee5\u4e0b\u306b\u73fe\u5728\u306e\u65e5\u6642\u3092\u6307\u5b9a\u3057\u305f\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u306b\u5909\u63db\u3059\u308b\u30b5\u30f3\u30d7\u30eb\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n<p><strong>\u30b5\u30f3\u30d7\u30eb\u30d7\u30ed\u30b0\u30e9\u30e0<\/strong><\/p>\n<pre class=\"lang:swift decode:true \" >\/\/DateFormatter\u30af\u30e9\u30b9\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u751f\u6210\r\nlet df = DateFormatter()\r\n\r\n\/\/DateFormatter\u30af\u30e9\u30b9\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u751f\u6210\r\ndf.dateFormat = &quot;yyyy-MM-dd' 'HH:mm:ss&quot;\r\n\r\n\/\/\u73fe\u5728\u306b\u65e5\u4ed8\u3092\u53d6\u5f97\r\nlet now = Date()\r\n        \r\nprint(df.string(from: now))<\/pre>\n<p><strong>\u5b9f\u884c\u7d50\u679c\uff1a<\/strong><\/p>\n<pre class=\"striped:false marking:false ranges:false nums:false nums-toggle:false lang:default decode:true \" >2017-10-02 10:16:20<\/pre>\n<h2>\u307e\u3068\u3081<\/h2>\n<p>\u3053\u3053\u3067\u306f\u6570\u5024\u306e\u6841\u6570\u3092\u63c3\u3048\u308b\u65b9\u6cd5\u3068\u3057\u3066\u3001<\/p>\n<p><strong>\u30fbformat\u3068\u306f<br \/>\n\u30fb\u6841\u6570\u3092\u6307\u5b9a\u3059\u308b\u65b9\u6cd5(0\u57cb\u3081)<br \/>\n\u30fb\u6841\u6570\u3092\u6307\u5b9a\u3059\u308b\u65b9\u6cd5(\u7a7a\u767d\u57cb\u3081)<br \/>\n\u30fb\u5c0f\u6570\u70b9\u306e\u6841\u6570\u3092\u63c3\u3048\u308b\u65b9\u6cd5<br \/>\n\u30fb\u65e5\u4ed8\u3092\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3059\u308b\u65b9\u6cd5\uff08DateFormatter\uff09<\/strong><\/p>\n<p>\u306a\u3069\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3057\u305f\u3002<\/p>\n<p><span style=\"color: #ff0000; background-color: #ffff99;\"><strong>\u6570\u5024\u306e\u6841\u6570\u3092\u63c3\u3048\u308b\u3068\u304d\u306bformat\u306f\u3088\u304f\u4f7f\u7528\u3057\u307e\u3059\u306e\u3067\u4f7f\u3044\u65b9\u306f\u7406\u89e3\u3057\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/strong><\/span><\/p>\n<p>\u3082\u3057format\u306e\u4f7f\u3044\u65b9\u3092\u5fd8\u308c\u3066\u3057\u307e\u3063\u305f\u3089\u3001\u3053\u306e\u8a18\u4e8b\u3092\u601d\u3044\u51fa\u3057\u3066\u304f\u3060\u3055\u3044\u306d\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6570\u5024\u306e\u6841\u6570\u3092\u6307\u5b9a\u3057\u305f\u6841\u3067\u63c3\u3048\u305f\u3044\u3068\u304d\u306b\u306fformat\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002 \u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001 \u30fbformat\u3068\u306f \u30fb\u6841\u6570\u3092\u6307\u5b9a\u3059\u308b\u65b9\u6cd5(0\u57cb\u3081) \u30fb\u6841\u6570\u3092\u6307\u5b9a\u3059\u308b\u65b9\u6cd5(\u7a7a\u767d\u57cb\u3081) 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