实际上，我发现正确的解决方案是在启动应用程序时清除该高速缓存。
雨燕：

class func clearWebCache(){
    let websiteDataTypes = NSSet(array: [
        WKWebsiteDataTypeDiskCache,
        WKWebsiteDataTypeOfflineWebApplicationCache,
        WKWebsiteDataTypeMemoryCache,
        WKWebsiteDataTypeLocalStorage,
        WKWebsiteDataTypeCookies,
        WKWebsiteDataTypeSessionStorage,
        WKWebsiteDataTypeIndexedDBDatabases,
        WKWebsiteDataTypeWebSQLDatabases])
    let date = NSDate(timeIntervalSince1970: 0)
    WKWebsiteDataStore.defaultDataStore().removeDataOfTypes(websiteDataTypes as! Set<String>, modifiedSince: date, completionHandler:{ })
}

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在iOS 9版本的WKWebView上，有一个属性customUserAgent。请尝试更改此属性：

// User Agent
webview.customUserAgent = @"Mozilla/5.0 (iPod; U; CPU iPhone OS 4_3_3 like Mac OS X; ja-jp) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8J2 Safari/6533.18.5";

// refresh webview
[webview reloadFromOrigin];

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我想看看现代网站是如何决定浏览器（因此，具有Web视图的应用程序）被认为是移动的。（MobileDetect）使用几个因素的组合。它寻找“移动的”报头的存在，但这些报头通常用于较旧的设备。然后，它基于用户代理进行正则表达式匹配。下面是它匹配的特定字符串：

protected static $phoneDevices = array(
    'iPhone'        => '\biPhone\b|\biPod\b', // |\biTunes
    'BlackBerry'    => 'BlackBerry|\bBB10\b|rim[0-9]+',
    'HTC'           => 'HTC|HTC.*(Sensation|Evo|Vision|Explorer|6800|8100|8900|A7272|S510e|C110e|Legend|Desire|T8282)|APX515CKT|Qtek9090|APA9292KT|HD_mini|Sensation.*Z710e|PG86100|Z715e|Desire.*(A8181|HD)|ADR6200|ADR6400L|ADR6425|001HT|Inspire 4G|Android.*\bEVO\b|T-Mobile G1|Z520m',
    'Nexus'         => 'Nexus One|Nexus S|Galaxy.*Nexus|Android.*Nexus.*Mobile|Nexus 4|Nexus 5|Nexus 6',
    // @todo: Is 'Dell Streak' a tablet or a phone? ;)
    'Dell'          => 'Dell.*Streak|Dell.*Aero|Dell.*Venue|DELL.*Venue Pro|Dell Flash|Dell Smoke|Dell Mini 3iX|XCD28|XCD35|\b001DL\b|\b101DL\b|\bGS01\b',
    'Motorola'      => 'Motorola|DROIDX|DROID BIONIC|\bDroid\b.*Build|Android.*Xoom|HRI39|MOT-|A1260|A1680|A555|A853|A855|A953|A955|A956|Motorola.*ELECTRIFY|Motorola.*i1|i867|i940|MB200|MB300|MB501|MB502|MB508|MB511|MB520|MB525|MB526|MB611|MB612|MB632|MB810|MB855|MB860|MB861|MB865|MB870|ME501|ME502|ME511|ME525|ME600|ME632|ME722|ME811|ME860|ME863|ME865|MT620|MT710|MT716|MT720|MT810|MT870|MT917|Motorola.*TITANIUM|WX435|WX445|XT300|XT301|XT311|XT316|XT317|XT319|XT320|XT390|XT502|XT530|XT531|XT532|XT535|XT603|XT610|XT611|XT615|XT681|XT701|XT702|XT711|XT720|XT800|XT806|XT860|XT862|XT875|XT882|XT883|XT894|XT901|XT907|XT909|XT910|XT912|XT928|XT926|XT915|XT919|XT925|XT1021|\bMoto E\b',
    'Samsung'       => 'Samsung|SM-G9250|GT-19300|SGH-I337|BGT-S5230|GT-B2100|GT-B2700|GT-B2710|GT-B3210|GT-B3310|GT-B3410|GT-B3730|GT-B3740|GT-B5510|GT-B5512|GT-B5722|GT-B6520|GT-B7300|GT-B7320|GT-B7330|GT-B7350|GT-B7510|GT-B7722|GT-B7800|GT-C3010|GT-C3011|GT-C3060|GT-C3200|GT-C3212|GT-C3212I|GT-C3262|GT-C3222|GT-C3300|GT-C3300K|GT-C3303|GT-C3303K|GT-C3310|GT-C3322|GT-C3330|GT-C3350|GT-C3500|GT-C3510|GT-C3530|GT-C3630|GT-C3780|GT-C5010|GT-C5212|GT-C6620|GT-C6625|GT-C6712|GT-E1050|GT-E1070|GT-E1075|GT-E1080|GT-E1081|GT-E1085|GT-E1087|GT-E1100|GT-E1107|GT-E1110|GT-E1120|GT-E1125|GT-E1130|GT-E1160|GT-E1170|GT-E1175|GT-E1180|GT-E1182|GT-E1200|GT-E1210|GT-E1225|GT-E1230|GT-E1390|GT-E2100|GT-E2120|GT-E2121|GT-E2152|GT-E2220|GT-E2222|GT-E2230|GT-E2232|GT-E2250|GT-E2370|GT-E2550|GT-E2652|GT-E3210|GT-E3213|GT-I5500|GT-I5503|GT-I5700|GT-I5800|GT-I5801|GT-I6410|GT-I6420|GT-I7110|GT-I7410|GT-I7500|GT-I8000|GT-I8150|GT-I8160|GT-I8190|GT-I8320|GT-I8330|GT-I8350|GT-I8530|GT-I8700|GT-I8703|GT-I8910|GT-I9000|GT-I9001|GT-I9003|GT-I9010|GT-I9020|GT-I9023|GT-I9070|GT-I9082|GT-I9100|GT-I9103|GT-I9220|GT-I9250|GT-I9300|GT-I9305|GT-I9500|GT-I9505|GT-M3510|GT-M5650|GT-M7500|GT-M7600|GT-M7603|GT-M8800|GT-M8910|GT-N7000|GT-S3110|GT-S3310|GT-S3350|GT-S3353|GT-S3370|GT-S3650|GT-S3653|GT-S3770|GT-S3850|GT-S5210|GT-S5220|GT-S5229|GT-S5230|GT-S5233|GT-S5250|GT-S5253|GT-S5260|GT-S5263|GT-S5270|GT-S5300|GT-S5330|GT-S5350|GT-S5360|GT-S5363|GT-S5369|GT-S5380|GT-S5380D|GT-S5560|GT-S5570|GT-S5600|GT-S5603|GT-S5610|GT-S5620|GT-S5660|GT-S5670|GT-S5690|GT-S5750|GT-S5780|GT-S5830|GT-S5839|GT-S6102|GT-S6500|GT-S7070|GT-S7200|GT-S7220|GT-S7230|GT-S7233|GT-S7250|GT-S7500|GT-S7530|GT-S7550|GT-S7562|GT-S7710|GT-S8000|GT-S8003|GT-S8500|GT-S8530|GT-S8600|SCH-A310|SCH-A530|SCH-A570|SCH-A610|SCH-A630|SCH-A650|SCH-A790|SCH-A795|SCH-A850|SCH-A870|SCH-A890|SCH-A930|SCH-A950|SCH-A970|SCH-A990|SCH-I100|SCH-I110|SCH-I400|SCH-I405|SCH-I500|SCH-I510|SCH-I515|SCH-I600|SCH-I730|SCH-I760|SCH-I770|SCH-I830|SCH-I910|SCH-I920|SCH-I959|SCH-LC11|SCH-N150|SCH-N300|SCH-R100|SCH-R300|SCH-R351|SCH-R400|SCH-R410|SCH-T300|SCH-U310|SCH-U320|SCH-U350|SCH-U360|SCH-U365|SCH-U370|SCH-U380|SCH-U410|SCH-U430|SCH-U450|SCH-U460|SCH-U470|SCH-U490|SCH-U540|SCH-U550|SCH-U620|SCH-U640|SCH-U650|SCH-U660|SCH-U700|SCH-U740|SCH-U750|SCH-U810|SCH-U820|SCH-U900|SCH-U940|SCH-U960|SCS-26UC|SGH-A107|SGH-A117|SGH-A127|SGH-A137|SGH-A157|SGH-A167|SGH-A177|SGH-A187|SGH-A197|SGH-A227|SGH-A237|SGH-A257|SGH-A437|SGH-A517|SGH-A597|SGH-A637|SGH-A657|SGH-A667|SGH-A687|SGH-A697|SGH-A707|SGH-A717|SGH-A727|SGH-A737|SGH-A747|SGH-A767|SGH-A777|SGH-A797|SGH-A817|SGH-A827|SGH-A837|SGH-A847|SGH-A867|SGH-A877|SGH-A887|SGH-A897|SGH-A927|SGH-B100|SGH-B130|SGH-B200|SGH-B220|SGH-C100|SGH-C110|SGH-C120|SGH-C130|SGH-C140|SGH-C160|SGH-C170|SGH-C180|SGH-C200|SGH-C207|SGH-C210|SGH-C225|SGH-C230|SGH-C417|SGH-C450|SGH-D307|SGH-D347|SGH-D357|SGH-D407|SGH-D415|SGH-D780|SGH-D807|SGH-D980|SGH-E105|SGH-E200|SGH-E315|SGH-E316|SGH-E317|SGH-E335|SGH-E590|SGH-E635|SGH-E715|SGH-E890|SGH-F300|SGH-F480|SGH-I200|SGH-I300|SGH-I320|SGH-I550|SGH-I577|SGH-I600|SGH-I607|SGH-I617|SGH-I627|SGH-I637|SGH-I677|SGH-I700|SGH-I717|SGH-I727|SGH-i747M|SGH-I777|SGH-I780|SGH-I827|SGH-I847|SGH-I857|SGH-I896|SGH-I897|SGH-I900|SGH-I907|SGH-I917|SGH-I927|SGH-I937|SGH-I997|SGH-J150|SGH-J200|SGH-L170|SGH-L700|SGH-M110|SGH-M150|SGH-M200|SGH-N105|SGH-N500|SGH-N600|SGH-N620|SGH-N625|SGH-N700|SGH-N710|SGH-P107|SGH-P207|SGH-P300|SGH-P310|SGH-P520|SGH-P735|SGH-P777|SGH-Q105|SGH-R210|SGH-R220|SGH-R225|SGH-S105|SGH-S307|SGH-T109|SGH-T119|SGH-T139|SGH-T209|SGH-T219|SGH-T229|SGH-T239|SGH-T249|SGH-T259|SGH-T309|SGH-T319|SGH-T329|SGH-T339|SGH-T349|SGH-T359|SGH-T369|SGH-T379|SGH-T409|SGH-T429|SGH-T439|SGH-T459|SGH-T469|SGH-T479|SGH-T499|SGH-T509|SGH-T519|SGH-T539|SGH-T559|SGH-T589|SGH-T609|SGH-T619|SGH-T629|SGH-T639|SGH-T659|SGH-T669|SGH-T679|SGH-T709|SGH-T719|SGH-T729|SGH-T739|SGH-T746|SGH-T749|SGH-T759|SGH-T769|SGH-T809|SGH-T819|SGH-T839|SGH-T919|SGH-T929|SGH-T939|SGH-T959|SGH-T989|SGH-U100|SGH-U200|SGH-U800|SGH-V205|SGH-V206|SGH-X100|SGH-X105|SGH-X120|SGH-X140|SGH-X426|SGH-X427|SGH-X475|SGH-X495|SGH-X497|SGH-X507|SGH-X600|SGH-X610|SGH-X620|SGH-X630|SGH-X700|SGH-X820|SGH-X890|SGH-Z130|SGH-Z150|SGH-Z170|SGH-ZX10|SGH-ZX20|SHW-M110|SPH-A120|SPH-A400|SPH-A420|SPH-A460|SPH-A500|SPH-A560|SPH-A600|SPH-A620|SPH-A660|SPH-A700|SPH-A740|SPH-A760|SPH-A790|SPH-A800|SPH-A820|SPH-A840|SPH-A880|SPH-A900|SPH-A940|SPH-A960|SPH-D600|SPH-D700|SPH-D710|SPH-D720|SPH-I300|SPH-I325|SPH-I330|SPH-I350|SPH-I500|SPH-I600|SPH-I700|SPH-L700|SPH-M100|SPH-M220|SPH-M240|SPH-M300|SPH-M305|SPH-M320|SPH-M330|SPH-M350|SPH-M360|SPH-M370|SPH-M380|SPH-M510|SPH-M540|SPH-M550|SPH-M560|SPH-M570|SPH-M580|SPH-M610|SPH-M620|SPH-M630|SPH-M800|SPH-M810|SPH-M850|SPH-M900|SPH-M910|SPH-M920|SPH-M930|SPH-N100|SPH-N200|SPH-N240|SPH-N300|SPH-N400|SPH-Z400|SWC-E100|SCH-i909|GT-N7100|GT-N7105|SCH-I535|SM-N900A|SGH-I317|SGH-T999L|GT-S5360B|GT-I8262|GT-S6802|GT-S6312|GT-S6310|GT-S5312|GT-S5310|GT-I9105|GT-I8510|GT-S6790N|SM-G7105|SM-N9005|GT-S5301|GT-I9295|GT-I9195|SM-C101|GT-S7392|GT-S7560|GT-B7610|GT-I5510|GT-S7582|GT-S7530E|GT-I8750|SM-G9006V|SM-G9008V|SM-G9009D|SM-G900A|SM-G900D|SM-G900F|SM-G900H|SM-G900I|SM-G900J|SM-G900K|SM-G900L|SM-G900M|SM-G900P|SM-G900R4|SM-G900S|SM-G900T|SM-G900V|SM-G900W8|SHV-E160K|SCH-P709|SCH-P729|SM-T2558|GT-I9205',
    'LG'            => '\bLG\b;|LG[- ]?(C800|C900|E400|E610|E900|E-900|F160|F180K|F180L|F180S|730|855|L160|LS740|LS840|LS970|LU6200|MS690|MS695|MS770|MS840|MS870|MS910|P500|P700|P705|VM696|AS680|AS695|AX840|C729|E970|GS505|272|C395|E739BK|E960|L55C|L75C|LS696|LS860|P769BK|P350|P500|P509|P870|UN272|US730|VS840|VS950|LN272|LN510|LS670|LS855|LW690|MN270|MN510|P509|P769|P930|UN200|UN270|UN510|UN610|US670|US740|US760|UX265|UX840|VN271|VN530|VS660|VS700|VS740|VS750|VS910|VS920|VS930|VX9200|VX11000|AX840A|LW770|P506|P925|P999|E612|D955|D802|MS323)',
    'Sony'          => 'SonyST|SonyLT|SonyEricsson|SonyEricssonLT15iv|LT18i|E10i|LT28h|LT26w|SonyEricssonMT27i|C5303|C6902|C6903|C6906|C6943|D2533',
    'Asus'          => 'Asus.*Galaxy|PadFone.*Mobile',
    // http://www.micromaxinfo.com/mobiles/smartphones
    // Added because the codes might conflict with Acer Tablets.
    'Micromax'      => 'Micromax.*\b(A210|A92|A88|A72|A111|A110Q|A115|A116|A110|A90S|A26|A51|A35|A54|A25|A27|A89|A68|A65|A57|A90)\b',
    // @todo Complete the regex.
    'Palm'          => 'PalmSource|Palm', // avantgo|blazer|elaine|hiptop|plucker|xiino ;
    'Vertu'         => 'Vertu|Vertu.*Ltd|Vertu.*Ascent|Vertu.*Ayxta|Vertu.*Constellation(F|Quest)?|Vertu.*Monika|Vertu.*Signature', // Just for fun ;)
    // http://www.pantech.co.kr/en/prod/prodList.do?gbrand=VEGA (PANTECH)
    // Most of the VEGA devices are legacy. PANTECH seem to be newer devices based on Android.
    'Pantech'       => 'PANTECH|IM-A850S|IM-A840S|IM-A830L|IM-A830K|IM-A830S|IM-A820L|IM-A810K|IM-A810S|IM-A800S|IM-T100K|IM-A725L|IM-A780L|IM-A775C|IM-A770K|IM-A760S|IM-A750K|IM-A740S|IM-A730S|IM-A720L|IM-A710K|IM-A690L|IM-A690S|IM-A650S|IM-A630K|IM-A600S|VEGA PTL21|PT003|P8010|ADR910L|P6030|P6020|P9070|P4100|P9060|P5000|CDM8992|TXT8045|ADR8995|IS11PT|P2030|P6010|P8000|PT002|IS06|CDM8999|P9050|PT001|TXT8040|P2020|P9020|P2000|P7040|P7000|C790',
    // http://www.fly-phone.com/devices/smartphones/ ; Included only smartphones.
    'Fly'           => 'IQ230|IQ444|IQ450|IQ440|IQ442|IQ441|IQ245|IQ256|IQ236|IQ255|IQ235|IQ245|IQ275|IQ240|IQ285|IQ280|IQ270|IQ260|IQ250',
    // http://fr.wikomobile.com
    'Wiko'          => 'KITE 4G|HIGHWAY|GETAWAY|STAIRWAY|DARKSIDE|DARKFULL|DARKNIGHT|DARKMOON|SLIDE|WAX 4G|RAINBOW|BLOOM|SUNSET|GOA|LENNY|BARRY|IGGY|OZZY|CINK FIVE|CINK PEAX|CINK PEAX 2|CINK SLIM|CINK SLIM 2|CINK +|CINK KING|CINK PEAX|CINK SLIM|SUBLIM',
    'iMobile'        => 'i-mobile (IQ|i-STYLE|idea|ZAA|Hitz)',
    // Added simvalley mobile just for fun. They have some interesting devices.
    // http://www.simvalley.fr/telephonie---gps-_22_telephonie-mobile_telephones_.html
    'SimValley'     => '\b(SP-80|XT-930|SX-340|XT-930|SX-310|SP-360|SP60|SPT-800|SP-120|SPT-800|SP-140|SPX-5|SPX-8|SP-100|SPX-8|SPX-12)\b',
     // Wolfgang - a brand that is sold by Aldi supermarkets.
     // http://www.wolfgangmobile.com/
    'Wolfgang'      => 'AT-B24D|AT-AS50HD|AT-AS40W|AT-AS55HD|AT-AS45q2|AT-B26D|AT-AS50Q',
    'Alcatel'       => 'Alcatel',
    'Nintendo' => 'Nintendo 3DS',
    // http://en.wikipedia.org/wiki/Amoi
    'Amoi'          => 'Amoi',
    // http://en.wikipedia.org/wiki/INQ
    'INQ'           => 'INQ',
    // @Tapatalk is a mobile app; http://support.tapatalk.com/threads/smf-2-0-2-os-and-browser-detection-plugin-and-tapatalk.15565/#post-79039
    'GenericPhone'  => 'Tapatalk|PDA;|SAGEM|\bmmp\b|pocket|\bpsp\b|symbian|Smartphone|smartfon|treo|up.browser|up.link|vodafone|\bwap\b|nokia|Series40|Series60|S60|SonyEricsson|N900|MAUI.*WAP.*Browser',
);

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如果你想确保与大多数网站匹配，试着在你的自定义用户代理头中包含一些这些元素。我认为至少包含“iPhone”是一个聪明的主意。

iOS 13.0及以上版本

WKWebView中有一个属性preferredContentMode，用于显示移动的版本。

webView.configuration.defaultWebpagePreferences.preferredContentMode = .mobile

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