{"id":38,"date":"2021-09-07T16:40:56","date_gmt":"2021-09-07T08:40:56","guid":{"rendered":"https:\/\/yomisoft.com\/?p=38"},"modified":"2023-09-01T10:02:57","modified_gmt":"2023-09-01T02:02:57","slug":"swift5-0%e7%b2%be%e7%ae%80%e7%ac%94%e8%ae%b0-%e7%ac%ac1%e7%ab%a0-%e6%95%b0%e6%8d%ae%e7%b1%bb%e5%9e%8b%e3%80%81%e5%8f%98%e9%87%8f%e5%b8%b8%e9%87%8f%e3%80%81%e7%b1%bb%e5%9e%8b%e6%8e%a8%e6%96%ad%e3%80%81","status":"publish","type":"post","link":"https:\/\/www.yomisoft.com\/index.php\/2021\/09\/07\/swift5-0%e7%b2%be%e7%ae%80%e7%ac%94%e8%ae%b0-%e7%ac%ac1%e7%ab%a0-%e6%95%b0%e6%8d%ae%e7%b1%bb%e5%9e%8b%e3%80%81%e5%8f%98%e9%87%8f%e5%b8%b8%e9%87%8f%e3%80%81%e7%b1%bb%e5%9e%8b%e6%8e%a8%e6%96%ad%e3%80%81\/","title":{"rendered":"Swift5.0\u7cbe\u7b80\u7b14\u8bb0-\u7b2c1\u7ae0-\u6570\u636e\u7c7b\u578b\u3001\u53d8\u91cf\u5e38\u91cf\u3001\u7c7b\u578b\u63a8\u65ad\u3001\u62fc\u63a5\u5b57\u7b26\u4e32"},"content":{"rendered":"

1.1\u6570\u636e\u7c7b\u578b<\/h2>\n

\u65e2\u7136\u662f\u7f16\u7a0b\u8bed\u8a00\uff0c\u90a3\u4e48\u5fc5\u7136\u4f1a\u6709\u4e00\u4e9b\u57fa\u7840\u6570\u636e\u7c7b\u578b\u4f9b\u5e7f\u5927\u7684\u5c0f\u4f19\u4f34\u4eec\u4f7f\u7528\u3002
\n\u7531\u4e8e\u6211\u9ed8\u8ba4\u8bfb\u6b64\u6587\u7ae0\u7684\u5c0f\u4f19\u4f34\u90fd\u662f\u5b66\u8fc7\u7f16\u7a0b\u7684\uff0c\u6211\u76f8\u4fe1\u4f60\u4eec\u770b\u540d\u5b57\u5c31\u77e5\u9053\u90fd\u80fd\u7528\u6765\u505a\u4ec0\u4e48\u4e86\u3002 :huaji12:
\n\u5173\u4e8e\u8fd9\u51e0\u4e2a\u6570\u636e\u7c7b\u578b\u7684\u53d6\u503c\u8303\u56f4\uff0c\u5404\u4f4d\u53ef\u4ee5\u81ea\u884c\u5ea6\u5a18\u3001\u8c37\u6b4c\u67e5\u8be2\u3002
\n\u4e0d\u8fc7\u6211\u4e5f\u5199\u4e86\u70b9\u5177\u4f53\u610f\u601d\u5dee\u4e0d\u591a\u662f\u8fd9\u6837\uff0c\u5982\u6709\u4e0d\u5bf9\u8fd8\u8bf7\u8c05\u89e3 :huaji22:
\n\u90a3\u4e48\u4e0b\u9762\u662fSwift\u4e2d\u63d0\u4f9b\u7684\u57fa\u7840\u6570\u636e\u7c7b\u578b\uff1a
\nInt\uff1a<\/strong>\u662f\u6574\u578b\uff0c\u5b58\u653e\u6b63\u8d1f\u6574\u6570<\/p>\n

\u4f8b\u5982\uff1a<\/strong>-2,114514,666,-999<\/p><\/blockquote>\n

Float\uff1a<\/strong>\u662f\u6d6e\u70b9\u578b\uff0c\u5b58\u653e\u6b63\u8d1f\u5c0f\u6570<\/p>\n

\u4f8b\u5982\uff1a<\/strong>-2.1,1.9,10.6,-9.5<\/p><\/blockquote>\n

Double\uff1a<\/strong>\u662f\u6d6e\u70b9\u578b\uff0c\u5b58\u653e\u6b63\u8d1f\u5c0f\u6570\uff0c\u53ea\u662f\u8303\u56f4\u6bd4Float\u66f4\u5927\u3002[heimu]\u5c31\u662f\u66f4\u7c97\uff0c\u66f4\u957f\uff0c\u5927\u5bb6\u90fd\u559c\u6b22\u7528\u4ed6[\/heimu]<\/p>\n

\u4f8b\u5982\uff1a<\/strong>-22.1212,3.1415926,-273.15,0.99999<\/p><\/blockquote>\n

Bool\uff1a<\/strong>\u662f\u5e03\u5c14\u7c7b\u578b\uff0c\u53d6\u503c\u53ea\u6709true\u548cfalse<\/p>\n

\u4f8b\u5982\uff1a<\/strong>\u5927\u5bb6\u90fd\u559c\u6b22B\u7ad9\uff0c\u662f\u4e0d\u662f\u6027\u53d6\u5411\u90fd\u51fa\u4e86\u95ee\u9898\uff0c\u90a3\u4e48\u5c31\u53ef\u4ee5Bool\u8868\u793a\uff0ctrue\u8868\u793a\u771f\u7684\u51fa\u4e86\u95ee\u9898\uff0cfalse\u8868\u793a\u5047\u7684\u6ca1\u6709\u51fa\u95ee\u9898<\/p><\/blockquote>\n

Character\uff1a<\/strong>\u8868\u793a\u4e00\u4e2a\u5b57\u7b26\uff0c\u7528\u82f1\u6587\u53cc\u5f15\u53f7\u5b9a\u4e49\u4e00\u4e2a\u5b57\u7b26\u5373\u53ef<\/p>\n

\u4f8b\u5982\uff1a<\/strong>\"a\"\uff0c\"b\"\uff0c\u7528\u82f1\u6587\u53cc\u5f15\u53f7\u5c31\u884c\u3001\u6709\u7684\u7f16\u7a0b\u8bed\u8a00\u9700\u8981\u7528\u5355\u5f15\u53f7\uff0c\u53cd\u6b63Swift\u7528\u82f1\u6587\u7684\u53cc\u5f15\u53f7\u7f16\u8bd1\u5668\u987a\u5229\u901a\u8fc7\u3002<\/p><\/blockquote>\n

String\uff1a<\/strong>\u8868\u793a\u5b57\u7b26\u4e32\uff0c\u5c31\u662f\u4e00\u4e32\u5b57\u7b26\uff0c\u7528\u82f1\u6587\u53cc\u5f15\u53f7\u5b9a\u4e49\u5373\u53ef<\/p>\n

\u4f8b\u5982\uff1a<\/strong>\"Hello World\"\uff0c\"Are you OK?\"<\/p><\/blockquote>\n

[danger]\u5343\u4e07\u8981\u6ce8\u610f\uff0c\u8fd9\u91cc\u7684\u6570\u636e\u7c7b\u578b\u90fd\u662f\u5927\u5199\u5f00\u5934\uff0c\u5343\u4e07\u4e0d\u8981\u5c0f\u5199\uff0c\u5426\u5219\u7535\u8111\u77ac\u95f4\u7206\u70b8 :huaji: [\/danger]
\n\u83b7\u53d6\u6570\u636e\u7c7b\u578b\uff1a<\/strong>
\n\u5229\u7528type(of:T)\u51fd\u6570\u83b7\u53d6\u53d8\u91cf\u6216\u5e38\u91cf\u7684\u6570\u636e\u7c7b\u578b<\/p>\n

\nlet a = 1 \/\/Int\u7c7b\u578b\u5e38\u91cf\nvar b = 2.0 \/\/Float\u6216Double\u7c7b\u578b\u53d8\u91cf\nlet c = true \/\/Bool\u7c7b\u578b\u5e38\u91cf\nvar d = \"\u55b5\u55b5\u55b5\" \/\/String\u7c7b\u578b\u53d8\u91cf\n\nprint(a)\nprint(b)\nprint(c)\nprint(d)\n\n\n\/*\n*\u7f16\u8bd1\u5668\u6253\u5370\u7ed3\u679c\uff1a\nInt\nDouble\nBool\nString\n*\/\n<\/code><\/pre>\n
\u6253\u5370\u8f93\u51fa\u8bed\u53e5print()<\/strong>
\n\u4e0d\u7ba1\u662f\u4ec0\u4e48\u7c7b\u578b\uff0c\u5982\u679c\u60f3\u6253\u5370\uff0c\u90a3\u4e48\u5c31\u76f4\u63a5\u653e\u5230\u6b64\u51fd\u6570\u91cc\u5373\u53ef\uff0c\u4e0a\u9762\u5df2\u7ecf\u6f14\u793a\u8fc7\u4e86\u3002
\nSwift\u4e2d\u7684\u6ce8\u91ca\u8ddf\u5176\u4ed6\u7f16\u7a0b\u8bed\u8a00\u7684\u6ce8\u91ca\u5e76\u6ca1\u4ec0\u4e48\u4e0d\u540c\uff0c\u8bed\u6cd5\u7ed3\u6784\u4e00\u6837<\/strong><\/p>\n
\n\/\/\u5355\u884c\u6ce8\u91ca\n\n\/*\n\u591a\u884c\u6ce8\u91ca\n*\/\n\n<\/code><\/pre>\n
1.2\u53d8\u91cf\u5e38\u91cf<\/h2>\n
\u4e00\u4e2a\u7f16\u7a0b\u8bed\u8a00\u4e2d\u90fd\u4f1a\u6709\u5e38\u91cf\u3001\u53d8\u91cf\u7684\u5b9a\u4e49\uff0c\u5728Swift\u4e2d\u5b9a\u4e49\u5e38\u91cf\u548c\u5b9a\u4e49\u53d8\u91cf\u975e\u5e38\u7684\u7b80\u5355\uff0c\u9700\u8981\u7528\u5230\u4e24\u4e2a\u5173\u952e\u5b57let\u548cvar\u3002<\/p>\n
\nlet\u662f\u5b9a\u4e49\u5e38\u91cf\u7684\u5173\u952e\u5b57\uff0c\u8868\u793a\u5b9a\u4e49\u7684\u503c\u4e0d\u80fd\u6539\u53d8\uff0c\u4e00\u65e6\u521d\u59cb\u5b9a\u4e49\u597d\u503c\uff0c\u540e\u9762\u6253\u6b7b\u90fd\u4e0d\u80fd\u53d8\uff0c\u4e00\u5fc3\u4e00\u610f\u53ea\u7231\u4e00\u4eba\u7684\u611f\u89c9\u3002
\nvar\u662f\u5b9a\u4e49\u53d8\u91cf\u7684\u5173\u952e\u5b57\uff0c\u8868\u793a\u5b9a\u4e49\u7684\u503c\u53ef\u4ee5\u6539\u53d8\uff0c\u7f51\u53cb\u90fd\u7231\u7eb8\u7247\u4eba\uff0c\u4e00\u5929\u6362\u4e00\u4e2a\u8001\u5a46\u7684\u611f\u89c9\u3002 :huaji18:<\/p><\/blockquote>\n
\u4e0b\u9762\u662f\u6f14\u793a\u5982\u4f55\u5b9a\u4e49\u4e00\u4e2a\u5e38\u91cf\u548c\u4e00\u4e2a\u53d8\u91cf\uff0c\u6bcf\u6761\u8bed\u53e5\u540e\u9762\u4e0d\u7528\u52a0\u5206\u53f7\u3002
\n\u5b9a\u4e49\u5e38\u91cf\u8bed\u6cd5\uff1a<\/strong>let \u5e38\u91cf\u540d:\u5e38\u91cf\u7c7b\u578b = \u5e38\u91cf\u503c<\/p>\n
\nlet int_value:Int = 1 \/\/Int\u7c7b\u578b\u5e38\u91cf\nlet float_value:Float = 2.0 \/\/Float\u7c7b\u578b\u5e38\u91cf\nlet double_value:Double = 3.14 \/\/Double\u7c7b\u578b\u5e38\u91cf\nlet bool_value:Bool = true \/\/Bool\u7c7b\u578b\u5e38\u91cf\nlet character_value:Character = \"a\" \/\/Character\u7c7b\u578b\u5e38\u91cf\nlet string_value:String = \"Hello World\" \/\/String\u7c7b\u578b\u5e38\u91cf\n\nprint(int_value)\nprint(float_value)\nprint(double_value)\nprint(bool_value)\nprint(character_value)\nprint(string_value)\n\n\/*\n*\u7f16\u8bd1\u5668\u6253\u5370\u7ed3\u679c\uff1a\n1\n2.0\n3.14\ntrue\na\nHello World\n*\/\n<\/code><\/pre>\n
\u5b9a\u4e49\u53d8\u91cf\u8bed\u6cd5\uff1a<\/strong>var \u53d8\u91cf\u540d:\u53d8\u91cf\u7c7b\u578b = \u53d8\u91cf\u503c<\/p>\n
\nvar int_value:Int = 1 \/\/Int\u7c7b\u578b\u53d8\u91cf\nvar float_value:Float = 0.2 \/\/Float\u7c7b\u578b\u53d8\u91cf\nvar double_value:Double = 4.13 \/\/Double\u7c7b\u578b\u53d8\u91cf\nvar bool_value:Bool = false \/\/Bool\u7c7b\u578b\u53d8\u91cf\nvar character_value:Character = \"b\" \/\/Character\u7c7b\u578b\u53d8\u91cf\nvar string_value:String = \"Hello Swift\" \/\/String\u7c7b\u578b\u53d8\u91cf\n\nprint(int_value)\nprint(float_value)\nprint(double_value)\nprint(bool_value)\nprint(character_value)\nprint(string_value)\n\n\/*\n*\u7f16\u8bd1\u5668\u6253\u5370\u7ed3\u679c\uff1a\n1\n0.2\n4.13\nfalse\nb\nHello Swift\n*\/\n<\/code><\/pre>\n
1.3\u7c7b\u578b\u63a8\u65ad<\/h2>\n
Swift\u53ef\u4ee5\u63a8\u65ad\u4f60\u5b9a\u4e49\u53d8\u91cf\u6216\u5e38\u91cf\u7c7b\u578b\uff0c\u4e8e\u662f\u6211\u4eec\u5728\u5b9a\u4e49\u5e38\u91cf\u548c\u53d8\u91cf\u7684\u65f6\u5019\u5c31\u4e0d\u7528\u52a0\u8f7d\u6570\u636e\u7c7b\u578b\u4e86\uff0c\u6bd4\u5982\u4e0b\u9762\u7684\u5199\u6cd5\uff1a<\/p>\n
\nlet value1 = 1 \/\/Int\u7c7b\u578b\u5e38\u91cf\nvar value2 = 9.9 \/\/Float\u7c7b\u578b\u53d8\u91cf\nlet value3 = false \/\/Bool\u7c7b\u578b\u5e38\u91cf\nvar value4 = true \/\/Bool\u7c7b\u578b\u53d8\u91cf\nlet value5 = \"s\" \/\/\u4f1a\u88ab\u63a8\u65ad\u4e3aCharacter\u6216String\u7c7b\u578b\u5e38\u91cf\nvar value6 = \"Hello World\" \/\/String\u7c7b\u578b\u53d8\u91cf\n\nprint(value1)\nprint(value2)\nprint(value3)\nprint(value4)\nprint(value5)\nprint(value6)\n\n\/*\n*\u7f16\u8bd1\u5668\u6253\u5370\u7ed3\u679c\uff1a\n1\n9.9\nfalse\ntrue\ns\nHello World\n*\/\n<\/code><\/pre>\n
\u5982\u679c\u5b9a\u4e49\u53d8\u91cf\u6216\u8005\u5e38\u91cf\u65f6\uff0c\u660e\u786e\u6307\u5b9a\u6570\u636e\u7c7b\u578b\u53eb\u663e\u5f0f\u7c7b\u578b\u5b9a\u4e49\uff0c\u5982\u679c\u4e0d\u660e\u786e\u6307\u5b9a\u6570\u636e\u7c7b\u578b\uff0c\u53eb\u4f5c\u9690\u5f0f\u6570\u636e\u7c7b\u578b\u5b9a\u4e49\uff0c\u6570\u636e\u7c7b\u578b\u53ef\u4ee5\u7531\u7f16\u8bd1\u5668\u81ea\u5df1\u63a8\u65ad\uff0c\u53cd\u6b63\u4e00\u822c\u6ca1\u4ec0\u4e48\u7279\u6b8a\u60c5\u51b5\uff0c\u90fd\u4e0d\u7528\u660e\u786e\u6307\u5b9a\u6570\u636e\u7c7b\u578b\u3002
\n\u6d4b\u8bd5\u5e38\u91cf\u548c\u53d8\u91cf\u4fee\u6539\u503c\uff1a<\/strong>
\n\u4e0b\u9762\u662f\u5bf9\u5e38\u91cf\u548c\u53d8\u91cf\u7684\u7b80\u5355\u6d4b\u8bd5\uff0c\u5728\u7f16\u8bd1\u5668\u4e2d\u80fd\u770b\u51fa\uff0c\u5bf9\u5e38\u91cf\u8fdb\u884c\u6539\u53d8\u503c\u4f1a\u62a5\u9519\uff0c\u800c\u53d8\u91cf\u6539\u53d8\u503c\u4e0d\u4f1a\u62a5\u9519<\/p>\n
\nlet a = 10 \/\/Int\u7c7b\u578b\u5e38\u91cf\na = 20 \n\/*\n\u7f16\u8bd1\u5668\u4f1a\u63d0\u793a\u5982\u4e0b\u4fe1\u606f\nCannot assign to value: 'a' is a 'let' constant \nChange 'let' to 'var' to make it mutable\n\u610f\u601d\u5c31\u662f\u5982\u679c\u4f60\u60f3\u8ba9 a = 20 \u5fc5\u987b\u628alet\u6539\u6210var\u624d\u884c\n*\/\nvar b = 50 \/\/Int\u7c7b\u578b\u53d8\u91cf\nb = 100\n<\/code><\/pre>\n
\u62fc\u63a5\u5b57\u7b26\u4e32\uff1a<\/strong>
\n\u6709\u4e2a\u6253\u5370\u8bed\u53e5\u5e0c\u671b\u80fd\u62fc\u63a5\u5b57\u7b26\u4e32\uff0c\u90a3\u4e48\u5206\u4e3a\u4e24\u79cd\u60c5\u51b5
\n\u4e00\u3001\u5982\u679c\u662fString\uff0c\u90a3\u4e48\u7528+\u53f7\u62fc\u63a5\u5373\u53ef\u3002
\n\u4f8b\u5b50\u5982\u4e0b\uff1a<\/p>\n
\nvar str1 = \"Hello\"\nvar str2 = \"World\"\nvar str3 = \"\u662fDJ~\u662fDJ~\u662fDJ~\"\n\nprint(\"\u5929\u5929\u5403\u9e21\u5403\u4e0d\u80d6,\"+\"\u5929\u5929\u6478\u9c7c\u8eab\u4f53\u68d2\")\nprint(str1+str2)\n\/\/\u867d\u7136print\u4f1a\u4e3b\u52a8\u5728\u7ed3\u5c3e\u8fdb\u884c\u6362\u884c\uff0c\u4f46\u662f\u4f60\u4e5f\u53ef\u4ee5\u5728\u67d0\u4e2a\u5b57\u7b26\u4e32\u4e2d\u95f4\u4e3b\u52a8\u6362\u884c\u3002\nprint(str1+\"World\"+\"\\nSwift\"+str3)\n\/*\n*\u7f16\u8bd1\u5668\u6253\u5370\u7ed3\u679c\uff1a\n\u5929\u5929\u5403\u9e21\u5403\u4e0d\u80d6,\u5929\u5929\u6478\u9c7c\u8eab\u4f53\u68d2\nHelloWorld\nHelloWorld\nSwift\u662fDJ~\u662fDJ~\u662fDJ~\n*\/\n<\/code><\/pre>\n
\u4e8c\u3001\u5982\u679c\u662f\u5176\u4ed6\u6570\u636e\u7c7b\u578b\uff0c\u9664\u4e86\u76f4\u63a5\u8f93\u51fa\u4ee5\u5916\uff0c\u60f3\u8981\u548c\u5b57\u7b26\u4e32\u62fc\u63a5\uff0c\u90a3\u4e48\u9700\u8981\u5229\u7528\\()\u8bed\u6cd5\u62fc\u63a5\u5b57\u7b26\u4e32\uff0c\u6216\u8005String()\u65b9\u5f0f\u5c06\u5176\u4ed6\u6570\u636e\u7c7b\u578b\u8f6c\u6210String\u7c7b\u578b\uff0c\u5173\u4e8e\u6570\u636e\u7c7b\u578b\u8f6c\u6362\uff0c\u540e\u9762\u7684\u7ae0\u8282\u4f1a\u5177\u4f53\u4ecb\u7ecd\u3002
\n\u4f8b\u5b50\u5982\u4e0b\uff1a<\/p>\n
\nvar a = 10\nprint(a)\nprint(\"a\u7684\u503c=\\(a)\")\nprint(\"a\u7684\u503c\u7b49\u4e8e\"+String(a))\n\/*\n*\u7f16\u8bd1\u5668\u6253\u5370\u7ed3\u679c\uff1a\n10\na\u7684\u503c=10\na\u7684\u503c\u7b49\u4e8e10\n*\/\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
1.1\u6570\u636e\u7c7b\u578b \u65e2\u7136\u662f\u7f16\u7a0b\u8bed\u8a00\uff0c\u90a3\u4e48\u5fc5\u7136\u4f1a\u6709\u4e00\u4e9b\u57fa\u7840\u6570\u636e\u7c7b\u578b\u4f9b\u5e7f\u5927\u7684\u5c0f\u4f19\u4f34\u4eec\u4f7f\u7528\u3002 \u7531\u4e8e\u6211\u9ed8\u8ba4\u8bfb\u6b64\u6587\u7ae0\u7684\u5c0f\u4f19\u4f34\u90fd\u662f\u5b66\u8fc7\u7f16\u7a0b\u7684\uff0c\u6211\u76f8 …<\/p>\n","protected":false},"author":1,"featured_media":70,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"emotion":"","emotion_color":"","title_style":"","license":"","footnotes":""},"categories":[3],"tags":[8,10,12],"class_list":["post-38","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-3","tag-swift","tag-10","tag-12"],"_links":{"self":[{"href":"https:\/\/www.yomisoft.com\/index.php\/wp-json\/wp\/v2\/posts\/38","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.yomisoft.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.yomisoft.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.yomisoft.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.yomisoft.com\/index.php\/wp-json\/wp\/v2\/comments?post=38"}],"version-history":[{"count":1,"href":"https:\/\/www.yomisoft.com\/index.php\/wp-json\/wp\/v2\/posts\/38\/revisions"}],"predecessor-version":[{"id":72,"href":"https:\/\/www.yomisoft.com\/index.php\/wp-json\/wp\/v2\/posts\/38\/revisions\/72"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.yomisoft.com\/index.php\/wp-json\/wp\/v2\/media\/70"}],"wp:attachment":[{"href":"https:\/\/www.yomisoft.com\/index.php\/wp-json\/wp\/v2\/media?parent=38"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.yomisoft.com\/index.php\/wp-json\/wp\/v2\/categories?post=38"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.yomisoft.com\/index.php\/wp-json\/wp\/v2\/tags?post=38"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}