Development log: WeChat applet Suncode incoming parameter analysis

When entering the applet through the QR code, you can get the parameters in the onload function.

onLoad(options) {
    
    
	console.log(options)
}

This is the printed result. So, what we need to use here is options.scene.

The first step is to use decodeURIComponent to parse it to get the incoming parameters.

post_id=74413&category_id=360

But this is a string, which is inconvenient to retrieve and store values ​​later.

In the second step , the ordinary strings in options.scene can be spliced ​​and modified into json strings, and then converted into objects using JSON.parse.

This becomes convenient data.

The sum is: where you need to get the parameters, just call the function this.sceneToObj()

onLoad(options) {
    
    
	if (options.scene) {
    
      // 扫码进来
		let query = this.sceneToObj(options.scene)
        this.setData({
    
    
        	postID: query.post_id || '',
        	categoryID: query.category_id || ''
        })
    }
},
sceneToObj(str) {
    
    
	const scene = decodeURIComponent(str)
	let str1 = scene.replace(/=/g, '":')
	let str2 = str1.replace(/&/g, ',"')
	let obj = JSON.parse('{"' + str2 + '}')
	return obj
}