H5 calculates the number of times the phone is shaken

This time I will bring you H5 to calculate the number of times the phone is shaken. What are the precautions for H5 to calculate the number of times the phone is shaken. The following is a practical case, let’s take a look.

1. deviceOrientation: an event that encapsulates the orientation sensor data. It can obtain the orientation data of the mobile phone in the static state, such as the angle, orientation, orientation, etc. of the mobile phone. .

2. deviceMotion: an event that encapsulates motion sensor data and can obtain data such as motion acceleration when the mobile phone is in motion.

Not much to say, just go to the code:

JavaScript：

var jsonObject=null;
        // 当页面加载完以后会执行window.onload
        window.onload = function() {
            var times = -1; // 记录摇动次数
            var last_time = 0;
            var borderSpeed = 800;  // 加速度变化临界值
            var x = y = z = last_x = last_y = last_z = 0;
            if (window.DeviceMotionEvent) {
                window.addEventListener('devicemotion',shake,false);
            }
            else
            {
                alert('您的设备不支持摇一摇哦');
            }
            // 每次手机移动的时候都会执行下面shake函数的代码
            function shake(eventData)
            {
                var acceleration = eventData.accelerationIncludingGravity;
                var curTime = new Date().getTime();
                var diffTime  = curTime-last_time;
                // 每隔100ms进行判断
                if (diffTime>100) {
                    x = acceleration.x;
                    y = acceleration.y;
                    z = acceleration.z;
                    var speed = Math.abs(x + y + z - last_x - last_y - last_z) / diffTime * 10000;
                    // 判断手机确实发生了摇动而不是正常的移动
                    if (speed>borderSpeed) {
                        times++;
                        document.getElementById("text").innerHTML=times+" times";
                        // 用户的微信昵称和头像连接发送一次即可，不需要每次都发送
                        if (times==0)
                        {
                            document.forms["insertForm"].headimg.value =img ;
                            document.forms["insertForm"].user.value = nickname;
                        }
                        document.forms["insertForm"].time.value = times;
                    }
                    last_time = curTime;
                    last_x = x;
                    last_y = y;
                    last_z = z;
                }
            }
        }

html：

<img src="hand.png">
<br/><font size="16" color="red" id="text"></font>

I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website!

Recommended reading:

H5’s window.postMessage and cross-domain

H5 multi-threading (Worker SharedWorker) use Detailed explanation

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