最近写项目时发现通过meta标签已无法禁止移动端双指缩放，一般的js写法也无法阻止，最终解决方案如下：

// 禁用缩放
function addMeta() {
$('head').append('<meta name="viewport" content="width=device-width,initial-scale=1,minimum-scale=1,maximum-scale=1,user-scalable=no" />');
}
setTimeout(addMeta, 3000);

// 禁用双指放大
document.documentElement.addEventListener('touchstart', function (event) {
if (event.touches.length > 1) {
event.preventDefault();
}
}, {
passive: false
});

// 禁用双击放大
var lastTouchEnd = 0;
document.documentElement.addEventListener('touchend', function (event) {
var now = Date.now();
if (now - lastTouchEnd <= 300) {
event.preventDefault();
}
lastTouchEnd = now;
}, {
passive: false
});