机型的大小和像素【iphoneX 、iphoneXS、iphoneXSMax、iphoneXR】

手机型号	开发尺寸	像素	命名	Device pixel ratio
iPhone XS Max	414 x 896	1242 x 2688	Default-1242h@3x	3
iPhoneXR	414 x 896	828 x 1792	Default-828h@2x	2
iPhoneX, XS	375 x 812	1125 × 2436	Default-812h@3x	3
iPhone6/7/8Plus	375 x 812	1242 × 2208	Default-736h@3x	3
iPhone6/7/8	375 X 667	750 × 1334	Default-667h@2x	2
iPhone5s,se	320 x 240	640 × 1136	Default-568h@2x	2
iPhone4s	640 × 960	320 x 240	Default@2x	2

注意：开发人员只需要记住开发尺寸

屏幕组成

齐刘海(44px) + 安全区域 + 手势区域(34px)

适配方案

viewport-fit

viewport-fit="contain"展示区域在安全区中，不包括齐刘海和底部手势区域
viewport-fit="cover"展示区域整个屏幕中，包括齐刘海和底部手势区域
所以使用viewport-fit="contain"就可以解决适配问题，将下面的代码放在标签中。

<meta name="viewport" content="width=device-width,initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no, viewport-fit=contain">

css媒体查询

/* x xs */
@media only screen and (device-width: 375px) and (device-height: 812px) and (-webkit-device-pixel-ratio: 3) {// iphoneX iphoneXS样式
}/* xr */
@media only screen and (device-width: 414px) and (device-height: 896px) and (-webkit-device-pixel-ratio: 2) {// iphoneXR样式
}/* xs max */
@media only screen and (device-width: 414px) and (device-height: 896px) and (-webkit-device-pixel-ratio: 3) {// iphoneXR样式
}

js判断
通过window.navigator.userAgent、window.devicePixelRatio、window.screen三个属性来匹配

// X、XS机型js检查
let isIphoneX = (/iphone/gi.test(window.navigator.userAgent) && window.devicePixelRatio && window.devicePixelRatio === 3 && window.screen.width === 375 && window.screen.height === 812)// XR机型js检查
let isIphoneXr = (/iphone/gi.test(window.navigator.userAgent) && window.devicePixelRatio && window.devicePixelRatio === 2 && window.screen.width === 414 && window.screen.height === 896)// XS MAX机型js检查
let isIphoneXsMax = (/iphone/gi.test(window.navigator.userAgent) && window.devicePixelRatio && window.devicePixelRatio === 3 && window.screen.width === 414 && window.screen.height === 896)// iphoneX系列机型js检查
// is iphone
function isIphone() {return /iphone/gi.test(window.navigator.userAgent)
}// 是否是iphone系机型
function isIphonXSeries() {if (typeof window !== 'undefined' && window) {return /iphone/gi.test(window.navigator.userAgent) && window.screen.height >= 812;}return false;
}

各个型号的UserAgent

●iOS
Mozilla/5.0 (iPhone; U; CPU like Mac OS X; en) AppleWebKit/420+ (KHTML, like Gecko) Version/3.0 Mobile/1C28 Safari/419.3

●iOS2
Mozilla/5.0 (iPhone; U; CPU iPhone OS 2_0 like Mac OS X; ja-jp) AppleWebKit/525.18.1 (KHTML, like Gecko) Version/3.1.1 Mobile/5A347 Safari/52
Mozilla/5.0 (iPhone; U; CPU iPhone OS 2_0 like Mac OS X; ja-jp) AppleWebKit/525.18.1 (KHTML, like Gecko) Version/3.1.1 Mobile/5A345 Safari/525.20
Mozilla/5.0 (iPhone; U; CPU iPhone OS 2_0_1 like Mac OS X; ja-jp) AppleWebKit/525.18.1 (KHTML, like Gecko) Version/3.1.1 Mobile/5B108 Safari/525.20
Mozilla/5.0 (iPhone; U; CPU iPhone OS 2_1 like Mac OS X; ja-jp) AppleWebKit/525.18.1 (KHTML, like Gecko) Version/3.1.1 Mobile/5F136 Safari/525.20

●iOS3
Mozilla/5.0 (iPhone; U; CPU iPhone OS 3_0 like Mac OS X; en-us) AppleWebKit/528.18 (KHTML, like Gecko) Version/4.0 Mobile/7A341 Safari/528.16
Mozilla/5.0 (iPhone; U; CPU iPhone OS 3_1_3 like Mac OS X; ja-jp) AppleWebKit/528.18 (KHTML, like Gecko) Version/4.0 Mobile/7E18 Safari/528.16

●iOS4
Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_0_1 like Mac OS X; ja-jp) AppleWebKit/532.9 (KHTML, like Gecko) Version/4.0.5 Mobile/8A306 Safari/6531.22.7
Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_0_2 like Mac OS X; ja-jp) AppleWebKit/532.9 (KHTML, like Gecko) Version/4.0.5 Mobile/8A400 Safari/6531.22.7
Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_1 like Mac OS X; ja-jp) AppleWebKit/532.9 (KHTML, like Gecko) Version/4.0.5 Mobile/8B117 Safari/6531.22.7
Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_2_1 like Mac OS X; ja-jp) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8C148 Safari/6533.18.5
Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_3 like Mac OS X; ja-jp) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8F190 Safari/6533.18.5
Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_3_1 like Mac OS X; ja-jp) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8G4 Safari/6533.18.5
Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_3_2 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8H7 Safari/6533.18.5
Mozilla/5.0 (iPhone; 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
Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_3_4 like Mac OS X; ja-jp) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8K2 Safari/6533.18.5
Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_3_5 like Mac OS X; ja-jp) AppleWebKit/533.17.9 (KHTML, like Gecko) Mobile/8L1

●iOS5
Mozilla/5.0 (iPhone; U; CPU iPhone OS 5_0 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Mobile/9A334 Safari/7534.48.3
Mozilla/5.0 (iPhone; CPU iPhone OS 5_0_1 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Mobile/9A405 Safari/7534.48.3
Mozilla/5.0 (iPhone; CPU iPhone OS 5_1_1 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Version/5.1 Mobile/9B206 Safari/7534.48.3

●iOS6
Mozilla/5.0 (iPhone; CPU iPhone OS 6_0 like Mac OS X) AppleWebKit/536.26 (KHTML, like Gecko) Version/6.0 Mobile/10A403 Safari/8536.25

■iPod●iOS2
Mozilla/5.0 (iPod; U; CPU like Mac OS X; en) AppleWebKit/420.1 (KHTML, like Gecko) Version/3.0 Mobile/3A100a Safari/419.3
Mozilla/5.0 (iPod; U; CPU iPhone OS 2_1 like Mac OS X; ja-jp) AppleWebKit/525.18.1 (KHTML, like Gecko) Version/3.1.1 Mobile/5F137 Safari/525.20

●iOS4
Mozilla/5.0 (iPod; U; CPU iPhone OS 4_1 like Mac OS X; ja-jp) AppleWebKit/532.9 (KHTML, like Gecko) Version/4.0.5 Mobile/8B118 Safari/6531.22.7
Mozilla/5.0 (iPod; U; CPU iPhone OS 4_2_1 like Mac OS X; ja-jp) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8C148 Safari/6533.18.5
Mozilla/5.0 (iPod; U; CPU iPhone OS 4_3_5 like Mac OS X; ja-jp) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8L1 Safari/6533.18.5

●iOS5
Mozilla/5.0 (iPod; CPU iPhone OS 5_0_1 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Version/5.1 Mobile/9A405 Safari/7534.48.3

■iPad●iOS3
Mozilla/5.0 (iPad; U; CPU OS 3_2 like Mac OS X; en-us) AppleWebKit/531.21.10 (KHTML, like Gecko) Version/4.0.4 Mobile/7B367 Safari/531.21.10
Mozilla/5.0 (iPad; U; CPU OS 3_2_1 like Mac OS X; en-us) AppleWebKit/531.21.10 (KHTML, like Gecko) Mobile/7B405

●iOS4
Mozilla/5.0 (iPad; U; CPU OS 4_2 like Mac OS X; zh-cn) AppleWebKit/533.17.9 (KHTML, like Gecko) Mobile/8C134
Mozilla/5.0 (iPad; U; CPU OS 4_3 like Mac OS X; ja-jp) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8F190 Safari/6533.18.5
Mozilla/5.0 (iPad; U; CPU OS 4_3_1 like Mac OS X; ja-jp) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8G4 Safari/6533.18.5
Mozilla/5.0 (iPad; U; CPU OS 4_3_2 like Mac OS X; ja-jp) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8H7 Safari/6533.18.5
Mozilla/5.0 (iPad; U; CPU 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
Mozilla/5.0 (iPad; U; CPU OS 4_3_4 like Mac OS X; ja-jp) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8K2 Safari/6533.18.5
Mozilla/5.0 (iPad; U; CPU OS 4_3_5 like Mac OS X; ja-jp) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8L1 Safari/6533.18.5

●iOS5
Mozilla/5.0 (iPad; CPU OS 5_0_1 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Version/5.1 Mobile/9A405 Safari/7534.48.3
Mozilla/5.0 (iPad; CPU OS 5_1_1 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Version/5.1 Mobile/9B206 Safari/7534.48.3

●iOS6
Mozilla/5.0 (iPad; CPU OS 6_0 like Mac OS X) AppleWebKit/536.26 (KHTML, like Gecko) Version/6.0 Mobile/10A403 Safari/8536.25

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