选择图片出base64编码，无法正常显示

[xiaolieask]

选择一张图片之后，设置返回base64编码，将base64编码放到图片中，图片无法正常显示

<View style={{
                width: 160,
                height: 36,
                backgroundColor: 'hsl(190,50%,70%)',
                paddingHorizontal: 16,
                paddingVertical: 8,
                borderRadius: 8
            }} onTouchEnd={() => {
                launchImageLibrary({ mediaType: 'photo', selectionLimit: 1, maxWidth: 360, maxHeight: 100, includeBase64: true, quality: 0.5 }, (data) => {
                    const { base64 = '', type = '' } = data.assets[0]
                    let auri = `data:image/png;base64,${base64}`
                    setUri(auri)
                })
            }}>
                <Text style={{ width: '100%', height: '100%', fontWeight: 'bold', textAlign: 'center' }}>选择</Text>
            </View>
            <Image
                style={{ width: 300, height: 300 }}
                source={{
                    uri: uri
                }}></Image>