我试图在AsyncStorage中存储一张图片，但我不知道该怎么做，我应该存储URI，还是路径？
我尝试的是一点废话，但我尝试了这个：

state = {
    avatarSource: null,
    avatarSource2: null,
}

constructor(props) {
    super(props);
    this.state = {
        modalVisible: false,
        images: [{
            url: '',
        }],
    }
    this.setModalVisible = this.setModalVisible.bind(this)
}

saveData() {
    AsyncStorage.getItem("uri");
}

然后当我选择我的图像是使用这个：

selectImage = async () => {
    ImagePicker.showImagePicker({ nodata: true, mediaType: 'photo' }, (response) => {
        console.log('Response = ', response);

        if (response.didCancel) {
            console.log('User cancelled image picker');
        } else if (response.error) {
            console.log('ImagePicker Error: ', response.error);
        } else if (response.customButton) {
            console.log('User tapped custom button: ', response.customButton);
        } else {

            // You can also display the image using data:
            // const source = { uri: 'data:image/jpeg;base64,' + response.data };

            this.setState({
                avatarSource: response.uri,
            });
            this.saveData; //here is where i save the data...
        }
    });
}

然后当我加载页面的时候。。

componentWillMount() {
    AsyncStorage.getItem('uri')

}

我的渲染是这样的。。

render() {
    return (
        <ScrollView>
            <View style={styles.container}>
                <View style={styles.avatarContainer}>
                    <TouchableOpacity onPress={() => {
                        this.setModalVisible(!this.state.modalVisible, this.state.avatarSource);
                    }}>
                        {
                            this.state.avatarSource && <Image source={{ uri: this.state.avatarSource }} style={styles.avatar} />
                        }
                    </TouchableOpacity>
                </View>
                <Button title="Seleciona a imagem" onPress={this.selectImage} />
                <View style={styles.avatarContainer}>
                    <TouchableOpacity onPress={() => {
                        this.setModalVisible(!this.state.modalVisible, this.state.avatarSource2);
                    }}>
                        {
                            this.state.avatarSource2 && <Image source={{ uri: this.state.avatarSource2 }} style={styles.avatar} />
                        }
                    </TouchableOpacity>
                </View>
                <Button title="Seleciona a imagem" onPress={this.selectImage2} />
            </View>
            <Modal style={styles.modalImage}
                animationType='slide'
                transparent={false}
                visible={this.state.modalVisible}>
                <TouchableHighlight style={{ backgroundColor: 'black' }} onPress={() => {
                    this.setModalVisible(!this.state.modalVisible) + this.props.navigation.navigate('Cartão de Cidadão');
                }}>
                    <Icon active name="close" size={30} style={{ textAlign: 'center', marginTop: 0, color: 'white' }} />
                </TouchableHighlight>
                <ImageViewer imageUrls={this.state.images} />
            </Modal>
        </ScrollView>
    );
}

}
我做错了什么？谢谢大家。