//index.js
//获取应用实例
var app = getApp();
Page({
STANDARD: 22,
rules: [
[18.5, 24, 28],
[18.5, 25, 30, 35, 40],
[18.5, 23, 25, 30]
],
ruleConfig: ['偏瘦', '正常', '偏胖', '肥胖', '重度肥胖', '极重度肥胖'],
dangerConfig: ['低（但其它疾病危险性增加）', '平均水平', '增加', '中度增加', '严重增加', '非常严重增加'],
data: {
array: ['中国标准', '国际标准', '亚洲标准'],
index: 0,
score: 0,
height: 0,
weight: 0,
physicalCondition: '未知',
weightStandard: 0,
danger: '未知',
charLt: '<'
},
onLoad: function () {
},
bindPickerChange: function (e) {
this.setData({
index: e.detail.value
})
},
bindKeyHightInput: function (e) {
this.setData({
height: e.detail.value
})
},
bindKeyWeightInput: function (e) {
this.setData({
weight: e.detail.value
})
},
calculateBtn: function (e) {
if (!this.data.height) {
wx.showToast({
title: '请输入身高'
})
return false;
}
if (!this.data.weight) {
wx.showToast({
title: '请输入体重'
})
return false;
}
this.calculate();
this.weightStandardCalculate();
this.physicalConditionCalculate();
},
//计算IBM值
calculate: function () {
let score = 0;
let height = this.data.height / 100;
score = (this.data.weight / (height * height)).toFixed(1);
this.setData({
score: score
})
},
//计算标准体重
weightStandardCalculate: function () {
let weight = 0;
let height = this.data.height / 100;
weight = (this.STANDARD * (height * height)).toFixed(1);
this.setData({
weightStandard: weight
})
},
//身体状况计算
physicalConditionCalculate: function () {
let rule = this.rules[this.data.index];
let value = 0;
let score = + this.data.score;
let length = rule.length;
if (score >= rule[length - 1]) {
value = length;
} else {
for (let length = rule.length, i = length; i >= 1; --i) {
if (score < rule[i] && score >= rule[i - 1])
value = i;
}
}
this.setData({
physicalCondition: this.ruleConfig[value]
})
this.setData({
danger: this.dangerConfig[value]
})
}
})
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