如何将API图像链接传递到AsyncImage源

Question

main.py的一部分：

class search(Screen):
    def __init__(self, **kwargs):
        Builder.load_file('search.kv')
        super(search, self).__init__(**kwargs)

    def searchNow(self):
        location = self.ids.location_search.text
        result = self.apiCall(location)
        tmpList = list()
        for entry in (result["data"]):
            tmpList.append(entry["result_object"]["location_string"])


        tmpList = list(dict.fromkeys(tmpList))
        count = len(tmpList)
        fill = 10 - count
        for i in range(fill):
            tmpList.append("")

        self.ids.sResult1.text = tmpList[0]
        self.ids.sResult2.text = tmpList[1]
        self.ids.sResult3.text = tmpList[2]
        self.ids.sResult4.text = tmpList[3]
        self.ids.sResult5.text = tmpList[4]
        self.ids.sResult6.text = tmpList[5]
        self.ids.sResult7.text = tmpList[6]
        self.ids.sResult8.text = tmpList[7]
        self.ids.sResult9.text = tmpList[8]
        self.ids.sResult10.text = tmpList[9]

        if (fill == 10):
            self.ids.sResult1.text = "No Search Results"

    def sR1(self):
        if self.ids.sResult1.text == "":
             return
        self.dispSearchResult(self.ids.sResult1.text)
    def sR2(self):
        if self.ids.sResult1.text == "":
             return
        self.dispSearchResult(self.ids.sResult2.text)
    def sR3(self):
        if self.ids.sResult1.text == "":
             return
        self.dispSearchResult(self.ids.sResult3.text)
    def sR4(self):
        if self.ids.sResult1.text == "":
             return
        self.dispSearchResult(self.ids.sResult4.text)
    def sR5(self):
        if self.ids.sResult1.text == "":
             return
        self.dispSearchResult(self.ids.sResult5.text)
    def sR6(self):
        if self.ids.sResult1.text == "":
             return
        self.dispSearchResult(self.ids.sResult6.text)
    def sR7(self):
        if self.ids.sResult1.text == "":
             return
        self.dispSearchResult(self.ids.sResult7.text)
    def sR8(self):
        if self.ids.sResult1.text == "":
             return
        self.dispSearchResult(self.ids.sResult8.text)
    def sR9(self):
        if self.ids.sResult1.text == "":
             return
        self.dispSearchResult(self.ids.sResult9.text)
    def sR10(self):
        if self.ids.sResult1.text == "":
             return
        self.dispSearchResult(self.ids.sResult10.text)

    def dispSearchResult(self, locString):
        result = self.apiCall(locString)
        SRname = (result["data"][0]["result_object"]["location_string"])
        SRimg = (result["data"][0]["result_object"]["photo"]["images"]["large"]["url"])
        SRdescription = (result["data"][0]["result_object"]["geo_description"])
        resultParams = list()
        resultParams[0] = SRname
        resultParams[1] = SRimg
        resultParams[2] = SRdescription
        SCREEN_MANAGER.current = 'sresult'




    def apiCall(self, location):
        url = "https://tripadvisor1.p.rapidapi.com/locations/search"

        querystring = {"query": location, "lang": "en_US", "units": "mi"}

        headers = {
            REDACTED
        }
        response = requests.get(url, headers=headers, params=querystring)
        result = response.json()
        print (response.text)
        return result

class sresult(Screen):
    def __init__(self, **kwargs):
        Builder.load_file('sresult.kv')
        super(sresult, self).__init__(**kwargs)


Builder.load_file('main.kv')
SCREEN_MANAGER.add_widget(MainScreen(name='main'))
SCREEN_MANAGER.add_widget(one(name='one'))
SCREEN_MANAGER.add_widget(why(name='why'))
SCREEN_MANAGER.add_widget(two(name='two'))
SCREEN_MANAGER.add_widget(search(name='search'))
SCREEN_MANAGER.add_widget(sresult(name='sresult'))



if __name__ == "__main__":
    TripMe().run()

sresult.kv：

<sresult>:
    name: 'sresult'
    FloatLayout:
        size_hint: None, None
        Image:
            source: "TRIPME.png"
            x: (root.width * .5)-100
            y: root.height * .8
            size_hint_x: 2
            allow_stretch: True

        AsyncImage:
            source: SRimg

我在传递图像链接（以及其他变量SRname和SRdescription）时遇到麻烦。我试过做source: app.SRimg和source: Screen.SRimg。我想避免创建全局变量，但是如果您知道如何使它起作用，那么任何帮助都可以。

Answer 1

如果将id添加到AsyncImage中的sresult.kv：

<sresult>:
    name: 'sresult'
    FloatLayout:
        size_hint: None, None
        Image:
            source: "TRIPME.png"
            x: (root.width * .5)-100
            y: root.height * .8
            size_hint_x: 2
            allow_stretch: True

        AsyncImage:
            id: asyncimage
            source: SRimg

然后在dispSearchResult()方法中，可以使用id和SCREEN_MANAGER设置源：

def dispSearchResult(self, locString):
    result = self.apiCall(locString)
    SRname = (result["data"][0]["result_object"]["location_string"])
    SRimg = (result["data"][0]["result_object"]["photo"]["images"]["large"]["url"])
    SRdescription = (result["data"][0]["result_object"]["geo_description"])
    resultParams = list()
    resultParams[0] = SRname
    resultParams[1] = SRimg
    resultParams[2] = SRdescription

    # pass the URL of the image to the AsyncImage instance
    SCREEN_MANAGER.get_screen('sresult').ids.asynchimage.source = SRimg

    SCREEN_MANAGER.current = 'sresult'

我尚未测试此代码，但我相信它会起作用。