{"id":9461,"date":"2020-06-12T23:09:40","date_gmt":"2020-06-12T15:09:40","guid":{"rendered":"https:\/\/www.zhangxinxu.com\/wordpress\/?p=9461"},"modified":"2022-09-29T16:04:42","modified_gmt":"2022-09-29T08:04:42","slug":"mobile-event-touches-zoom-sacle","status":"publish","type":"post","link":"https:\/\/www.zhangxinxu.com\/wordpress\/2020\/06\/mobile-event-touches-zoom-sacle\/","title":{"rendered":"\u79fb\u52a8\u7aef\u53cc\u6307\u7f29\u653e\u56fe\u7247JS\u4e8b\u4ef6\u7684\u5b9e\u8df5\u5fc3\u5f97"},"content":{"rendered":"<p>by <a href=\"https:\/\/www.zhangxinxu.com\/\">zhangxinxu<\/a> from <a href=\"https:\/\/www.zhangxinxu.com\/wordpress\/?p=9461\">https:\/\/www.zhangxinxu.com\/wordpress\/?p=9461<\/a><br \/>\n\u672c\u6587\u6b22\u8fce\u5206\u4eab\u4e0e\u805a\u5408\uff0c\u5168\u6587\u8f6c\u8f7d\u5c31\u4e0d\u5fc5\u4e86\uff0c\u5c0a\u91cd\u7248\u6743\uff0c\u5708\u5b50\u5c31\u8fd9\u4e48\u5927\uff0c\u82e5\u6025\u7528\u53ef\u4ee5\u8054\u7cfb\u6388\u6743\u3002<\/p>\n<p><script>window.wxShareImgUrl = 'https:\/\/www.zhangxinxu.com\/study\/image\/share\/202006-pinch-spread.png';<\/script><\/p>\n<h3>\u4e00\u3001Chrome\u6d4f\u89c8\u5668\u53cc\u6307\u89e6\u6478\u7684\u6a21\u62df<\/h3>\n<p>\u7ed3\u679c\u662f\u6a21\u62df\u4e0d\u4e86\u3002<\/p>\n<p>\u9875\u9762\u6574\u4f53\u7f29\u653e\u884c\u4e3a\u662f\u53ef\u4ee5\u901a\u8fc7\u6309\u4f4fShift\u952e+\u9875\u9762\u5de6\u952e\u6a21\u62df\u7684\uff0c\u4f46\u662f\uff0c\u5b9e\u9645\u4e0a\uff0c\u8fd8\u662f\u4e00\u4e2a\u89e6\u6478\u70b9\uff0c\u56e0\u6b64\u65e0\u6cd5\u6a21\u62df\u53cc\u6307\u7f29\u653e\u884c\u4e3a\u3002<\/p>\n<p>\u9664\u975e\u662f\u6709\u89e6\u6478\u677f\uff0c\u6216\u8005\u5c4f\u5e55\u5c31\u662f\u89e6\u6478\u5c4f\u3002<\/p>\n<p>\u5426\u5219\uff0c\u53ea\u80fd\u8fde\u624b\u673a\u8fdb\u884c\u8c03\u8bd5\u4e86\u3002<\/p>\n<h4>Mac\u89e6\u63a7\u677f\u53cc\u6307\u7f29\u653e<\/h4>\n<p><strong>\u672c\u5c0f\u8282\u5185\u5bb9\u8865\u5145\u4e8e2022-09-29<\/strong><\/p>\n<p>Mac\u89e6\u63a7\u677f\u7684\u53cc\u6307\u7f29\u653e\u53ef\u4ee5\u4f7f\u7528\u4e0b\u9762\u7684\u903b\u8f91\u5224\u65ad\uff1a<\/p>\n<pre>\/\/ mac \u53cc\u6307\u7f29\u653e\r\ndocument.addEventListener('mousewheel', function (event) {\r\n  if (!event.deltaY || !event.ctrlKey) {\r\n    return;\r\n  }\r\n  event.preventDefault();\r\n\r\n  \/\/ \u7f29\u653e\u6267\u884c\r\n  if (event.deltaY < 0) {\r\n    \/\/ \u653e\u5927...\r\n  } else if (event.deltaY > 0) {\r\n    \/\/ \u7f29\u5c0f...\r\n  }\r\n}, {\r\n  passive: false\r\n});<\/pre>\n<p>\u5176\u4e2d\uff0c<code>'mousewheel'<\/code> \u53ef\u4ee5\u6539\u6210 <code>'wheel'<\/code> \u4e8b\u4ef6\u3002<\/p>\n<p>\u653e\u5927\u548c\u7f29\u5c0f\u7684\u903b\u8f91\u5199\u5728\u5bf9\u5e94\u7684\u4ee3\u7801\u4f4d\u7f6e\u5904\u3002<\/p>\n<h3>\u4e8c\u3001\u89e6\u6478\u5c4f\u4e0eevent.touches<\/h3>\n<p>\u5728\u89e6\u5c4f\u8bbe\u5907\u4e0b\uff0c\u8981\u5224\u65ad\u662f\u5355\u6307\u8fd8\u662f\u591a\u6307\u64cd\u4f5c\uff0c\u53ef\u4ee5\u901a\u8fc7<code>event.touches<\/code>\u6570\u7ec4\u5bf9\u8c61\u7684\u957f\u5ea6\u5224\u65ad\u3002<\/p>\n<p>\u4f8b\u5982\uff1a<\/p>\n<pre>document.addEventListener('touchstart', function (event) {\r\n    var touches = event.touches;\r\n    if (touches.length == 1) {\r\n        console.log('\u5355\u6307');\r\n    } else if (touches.length >= 2) {\r\n        console.log('\u591a\u6307');\r\n    }\r\n});<\/pre>\n<p>\u6309\u7167\u6211\u4eec\u7684\u7406\u89e3\uff0c\u4e0a\u9762\u7684\u903b\u8f91\u5e94\u8be5\u662f\u65e0\u61c8\u53ef\u51fb\u7684\u3002<\/p>\n<p>\u5b9e\u9645\u4e0a\u5e76\u4e0d\u662f\u3002<\/p>\n<p>\u6211\u4e00\u5f00\u59cb\u4e5f\u662f\u5728<code>'touchstart'<\/code>\u4e8b\u4ef6\u4e2d\u5224\u65ad\u662f\u5355\u6307\u8fd8\u662f\u53cc\u6307\uff0c\u7ed3\u679c\u53d1\u73b0\u4e86\u5947\u602a\u7684\u73b0\u8c61\uff0c\u6709\u65f6\u5019\u662f\u5355\u6307\uff0c\u6709\u65f6\u5019\u662f\u53cc\u6307\uff0c\u53cc\u6307\u590d\u73b0\u7684\u6982\u7387\u53ef\u80fd\u4e0d\u52301\u6210\u3002<\/p>\n<p>\u8fd9\u53ef\u771f\u662f\u5947\u602a\u4e86\u3002<\/p>\n<p>\u540e\u6765\u4e00\u756a\u6d4b\u8bd5\uff0c\u7ec8\u4e8e\u5f04\u6e05\u695a\u539f\u56e0\u4e86\u3002<\/p>\n<p>\u53ea\u6709\u5f53\u4e24\u4e2a\u6307\u5934\u540c\u65f6\u89e6\u6478\u5c4f\u5e55\u7684\u65f6\u5019\uff0c\u624d\u80fd\u5728touchstart\u4e8b\u4ef6\u4e2d\u88ab\u8bc6\u522b\u4e3a\u53cc\u6307\u64cd\u4f5c\u3002<\/p>\n<p>\u8fd9\u592a\u96be\u4e86\uff0c\u6ca1\u6709\u8c01\u7684\u4e24\u4e2a\u6307\u5934\u662f\u4e00\u6837\u957f\u7684\uff0c\u5f88\u96be\u540c\u4e00\u65f6\u95f4\u6233\u4e2d\u5c4f\u5e55\u7684\u3002<\/p>\n<p>\u56e0\u6b64\uff0c\u53cc\u6307\u4e8b\u4ef6\u7684\u5224\u65ad\u9700\u8981\u5728<code>touchmove<\/code>\u4e8b\u4ef6\u4e2d\u624d\u884c\u3002<\/p>\n<h3>\u4e09\u3001\u53cc\u6307\u884c\u4e3a\u7684\u5224\u65ad<\/h3>\n<p>\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n<pre>document.addEventListener('touchmove', function (event) {\r\n    if (event.touches && event.touches.length == 2) {\r\n        console.log('\u53cc\u6307\u5728\u79fb\u52a8');\r\n    }\r\n});<\/pre>\n<h3>\u56db\u3001\u53cc\u6307\u7f29\u653e\u529f\u80fd\u7684\u5b9e\u73b0<\/h3>\n<p>\u53cc\u6307\u7f29\u653e\u529f\u80fd\u7684\u5b9e\u73b0\u7684\u96be\u70b9\u5c31\u662f\u7f29\u653e\u6bd4\u4f8b\u7684\u8ba1\u7b97\u3002<\/p>\n<p><code>event.touches<\/code>\u4e2d\u7684\u6bcf\u4e00\u9879\u90fd\u662f\u89e6\u6478\u70b9\u5bf9\u8c61\uff0c\u5305\u542b\u4e86\u89e6\u78b0\u7684\u5143\u7d20\u4ee5\u53ca\u89e6\u6478\u70b9\u7684\u5750\u6807\u3002<\/p>\n<p>\u5176\u4e2d\uff0c\u89e6\u6478\u70b9\u7684\u5750\u6807\u5c31\u53ef\u4ee5\u7528\u6765\u8ba1\u7b97\u7f29\u653e\u6bd4\u4f8b\u3002<\/p>\n<p>\u6211\u4eec\u8bb0\u5f55\u4e0b\u7b2c\u4e00\u6b21\u53cc\u6307\u884c\u4e3a\u53d1\u751f\u65f6\u5019\u7684\u4e24\u4e2a\u624b\u6307\u70b9\u7684\u5750\u6807\u503c\uff0c\u4e8e\u662f\u5c31\u53ef\u4ee5\u8ba1\u7b97\u51fa\u8fd9\u4e24\u4e2a\u6307\u5934\u4e4b\u95f4\u7684\u8ddd\u79bb\uff1b<\/p>\n<p>\u7136\u540e\u7ee7\u7eed<code>touchmove<\/code>\u7684\u65f6\u5019\uff0c\u5b9e\u65f6\u8ba1\u7b97\u51fa\u65b0\u7684\u4e24\u4e2a\u624b\u6307\u7684\u5750\u6807\u8ddd\u79bb\u3002<\/p>\n<p>\u4e00\u5f00\u59cb\u7684\u8ddd\u79bb\/\u73b0\u5728\u7684\u8ddd\u79bb = \u5e94\u8be5\u7f29\u653e\u7684\u6bd4\u4f8b\u3002<\/p>\n<p>\u5982\u4e0b\u56fe\u6240\u793a\uff1a<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/image.zhangxinxu.com\/image\/blog\/202006\/pinch-spread.png\" width=\"543\" height=\"177\" alt=\"\u53cc\u6307\u64cd\u4f5c\u793a\u610f\" class=\"alignnone size-medium\" \/><\/p>\n<h4>\u5b9e\u4f8b\u6f14\u793a<\/h4>\n<p>\u5047\u8bbe\u9875\u9762\u4e0a\u6709\u4e00\u5f20\u56fe\u7247\u5143\u7d20\uff0c\u8981\u5b9e\u73b0\u8fd9\u79cd\u56fe\u7247\u7684\u53cc\u6307\u7f29\u653e\u9884\u89c8\u6548\u679c\uff1a<\/p>\n<pre>&lt;img id=\"image\" src=\"1.png\"&gt;<\/pre>\n<p>\u5219\u53ef\u4ee5\u8bd5\u8bd5\u4f7f\u7528\u4e0b\u9762\u6240\u793a\u7684JS\u4ee3\u7801\uff1a<\/p>\n<pre>var eleImg = document.querySelector('#image');\r\nvar store = {\r\n    scale: 1\r\n};\r\n<span style=\"color:green;\">\/\/ \u7f29\u653e\u4e8b\u4ef6\u7684\u5904\u7406<\/span>\r\neleImg.addEventListener('touchstart', function (event) {\r\n    var touches = event.touches;\r\n    var events = touches[0];\r\n    var events2 = touches[1];\r\n\r\n    event.preventDefault();\r\n\r\n    <span style=\"color:green;\">\/\/ \u7b2c\u4e00\u4e2a\u89e6\u6478\u70b9\u7684\u5750\u6807<\/span>\r\n    store.pageX = events.pageX;\r\n    store.pageY = events.pageY;\r\n\r\n    store.moveable = true;\r\n\r\n    if (events2) {\r\n        store.pageX2 = events2.pageX;\r\n        store.pageY2 = events2.pageY;\r\n    }\r\n\r\n    store.originScale = store.scale || 1;\r\n});\r\ndocument.addEventListener('touchmove', function (event) {\r\n    if (!store.moveable) {\r\n        return;\r\n    }\r\n\r\n    event.preventDefault();\r\n\r\n    var touches = event.touches;\r\n    var events = touches[0];\r\n    var events2 = touches[1];\r\n    <span style=\"color:green;\">\/\/ \u53cc\u6307\u79fb\u52a8<\/span>\r\n    if (events2) {\r\n        <span style=\"color:green;\">\/\/ \u7b2c2\u4e2a\u6307\u5934\u5750\u6807\u5728touchmove\u65f6\u5019\u83b7\u53d6<\/span>\r\n        if (!store.pageX2) {\r\n            store.pageX2 = events2.pageX;\r\n        }\r\n        if (!store.pageY2) {\r\n            store.pageY2 = events2.pageY;\r\n        }\r\n\r\n        <span style=\"color:green;\">\/\/ \u83b7\u53d6\u5750\u6807\u4e4b\u95f4\u7684\u4e3e\u4f8b<\/span>\r\n        var getDistance = function (start, stop) {\r\n            return Math.hypot(stop.x - start.x, stop.y - start.y);\r\n        };\r\n        <span style=\"color:green;\">\/\/ \u53cc\u6307\u7f29\u653e\u6bd4\u4f8b\u8ba1\u7b97<\/span>\r\n        var zoom = getDistance({\r\n            x: events.pageX,\r\n            y: events.pageY\r\n        }, {\r\n            x: events2.pageX,\r\n            y: events2.pageY\r\n        }) \/\r\n        getDistance({\r\n            x: store.pageX,\r\n            y: store.pageY\r\n        }, {\r\n            x: store.pageX2,\r\n            y: store.pageY2\r\n        });\r\n        <span style=\"color:green;\">\/\/ \u5e94\u7528\u5728\u5143\u7d20\u4e0a\u7684\u7f29\u653e\u6bd4\u4f8b<\/span>\r\n        var newScale = store.originScale * zoom;\r\n        <span style=\"color:green;\">\/\/ \u6700\u5927\u7f29\u653e\u6bd4\u4f8b\u9650\u5236<\/span>\r\n        if (newScale &gt; 3) {\r\n            newScale = 3;\r\n        }\r\n        <span style=\"color:green;\">\/\/ \u8bb0\u4f4f\u4f7f\u7528\u7684\u7f29\u653e\u503c<\/span>\r\n        store.scale = newScale;\r\n        <span style=\"color:green;\">\/\/ \u56fe\u50cf\u5e94\u7528\u7f29\u653e\u6548\u679c<\/span>\r\n        eleImg.style.transform = 'scale('+ newScale +')';\r\n    }\r\n});\r\n\r\ndocument.addEventListener('touchend', function () {\r\n    store.moveable = false;\r\n\r\n    delete store.pageX2;\r\n    delete store.pageY2;\r\n});\r\ndocument.addEventListener('touchcancel', function () {\r\n    store.moveable = false;\r\n\r\n    delete store.pageX2;\r\n    delete store.pageY2;\r\n});<\/pre>\n<p>\u5927\u5bb6\u53ef\u4ee5\u8bbf\u95ee\u8fd9\u4e2a\u5730\u5740\uff08\u5982\u679c\u624b\u673a\u8bbf\u95ee\u672c\u6587\uff09\uff1a<a href=\"https:\/\/www.zhangxinxu.com\/study\/202006\/resize.html\" rel=\"noopener\" target=\"_blank\">https:\/\/www.zhangxinxu.com\/study\/202006\/resize.html<\/a><\/p>\n<p>\u6216\u8005\u626b\u4e0b\u9762\u7684\u7801\u8fdb\u884c\u4f53\u9a8c\uff08\u5982\u679c\u662fPC\u6d4f\u89c8\u5668\u8bbf\u95ee\uff09\uff1a<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/image.zhangxinxu.com\/image\/blog\/202006\/qrcode-touch-scale.png\" width=\"150\" height=\"150\" alt=\"\u4e8c\u7ef4\u7801\" class=\"alignnone size-medium\" \/><\/p>\n<p>\u53cc\u6307\u7f29\u653e\u6548\u679c\u5c31\u53ef\u4ee5\u4f53\u9a8c\u4e86\uff0c\u6700\u5927\u6bd4\u4f8b\u505a\u4e86\u9650\u5236\uff0c\u6700\u5c0f\u6bd4\u4f8b\u6ca1\u6709\u505a\u9650\u5236\u3002<\/p>\n<h3>\u4e94\u3001\u7ed3\u8bed\u4ee5\u53ca\u5176\u4ed6<\/h3>\n<p>demo\u9875\u9762\u7684<code>touchmove<\/code>\u6ca1\u6709\u8bbe\u7f6e<code>passive:false<\/code>\u4e5f\u6ca1\u6709\u62a5\u9519\uff0c\u662f\u56e0\u4e3a<code>html<\/code>\u6807\u7b7e\u8bbe\u7f6e\u4e86\u5982\u4e0bCSS\uff1a<\/p>\n<pre>html { touch-action: none; }<\/pre>\n<p>\u5982\u679c\u6709\u5174\u8da3\u4e86\u89e3\u80cc\u540e\u539f\u7406\uff0c\u53ef\u4ee5\u8bbf\u95ee\u8fd9\u7bc7\u6587\u7ae0\uff1a<a href=\"https:\/\/www.zhangxinxu.com\/wordpress\/?p=7765\">touch-action\u7b80\u4ecb\u4e0etreated as passive\u9519\u8bef\u89e3\u51b3<\/a><\/p>\n<p>\u672c\u6587\u662f\u81ea\u5df1\u5b9e\u9645\u5de5\u4f5c\u5b9e\u8df5\u4e2d\u7684\u4e00\u70b9\u624b\u673a\u4e2d\u53cc\u6307\u7f29\u653e\u56fe\u7247\u7684\u7ecf\u9a8c\u5206\u4eab\uff0c\u8003\u8651\u5230\u81ea\u5df1\u4ee5\u540e\u9047\u5230\u7c7b\u4f3c\u9700\u6c42\u53ef\u80fd\u8fd8\u4f1a\u7528\u5230\uff0c\u6240\u4ee5\u8bb0\u5f55\u4e0b\uff0c\u5e0c\u671b\u53ef\u4ee5\u5e2e\u5230\u6709\u7c7b\u4f3c\u9700\u6c42\u7684\u5c0f\u4f19\u4f34\u3002<\/p>\n<p>\u4ee5\u4e0a~\u611f\u8c22\u9605\u8bfb\uff0c\u6b22\u8fceshare~<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"\/\/image.zhangxinxu.com\/image\/emtion\/emoji\/1f618.svg\" width=\"20\" height=\"20\" align=\"absmiddle\"><\/p>\n<p>\u672c\u6587\u4e3a\u539f\u521b\u6587\u7ae0\uff0c\u6b22\u8fce\u5206\u4eab\uff0c\u52ff\u5168\u6587\u8f6c\u8f7d\uff0c\u5982\u679c\u5b9e\u5728\u559c\u6b22\uff0c\u53ef\u6536\u85cf\uff0c\u6c38\u4e0d\u8fc7\u671f\uff0c\u4e14\u4f1a\u53ca\u65f6\u66f4\u65b0\u77e5\u8bc6\u70b9\u53ca\u4fee\u6b63\u9519\u8bef\uff0c\u9605\u8bfb\u4f53\u9a8c\u4e5f\u66f4\u597d\u3002<br \/>\n\u672c\u6587\u5730\u5740\uff1a<a href=\"https:\/\/www.zhangxinxu.com\/wordpress\/?p=9461\">https:\/\/www.zhangxinxu.com\/wordpress\/?p=9461<\/a><\/p>\n<p>\uff08\u672c\u7bc7\u5b8c\uff09<\/p>\n","protected":false},"excerpt":{"rendered":"<p><img decoding=\"async\" src=\"https:\/\/image.zhangxinxu.com\/image\/blog\/202006\/pinch-spread-cover.png\" width=\"160\" height=\"110\" alt=\"\u53cc\u6307\u7f29\u653e\u793a\u610f\u56fe\" class=\"alignright size-medium\" loading=\"lazy\" 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