##1.獲取圖片真實寬度
~~~
imageLoad: function (e) {//獲取圖片真實寬度
var imgwidth = e.detail.width,
imgheight = e.detail.height,
//寬高比
ratio = imgwidth / imgheight;
console.log(imgwidth, imgheight)
//計算的高度值
var viewHeight = 750 / ratio;
var imgheight = viewHeight;
var imgheights = this.data.imgheights;
//把每一張圖片的對應的高度記錄到數組里
imgheights[e.target.dataset.id] = imgheight;
this.setData({
imgheights: imgheights
})
},
~~~
