NavigationBar里面自定义TouchableOpacity封装的组件好像点击失效？

[Mxiaer8]

 <NavigationBar
                    style={styles.headBar}
                    tintColor='#333'
                    title={
                        <NavigationBar.Title style={styles.title}>Sign Up</NavigationBar.Title>
                }
                    leftView={
                    <TouchableOpacity
                        style={styles.test}
                        onPress={this.onBackHandle} //点击无效
                    >
                        <View style={styles.leftView}>
                            <Svg icon="zuojiantou" size="20" style={styles.backSvg} />
                            <Text style={styles.leftViewText}>Back</Text>
                        </View>
                    </TouchableOpacity>
                }
                rightView={
                    <TouchableOpacity
                        onPress={this.onForwardHandle} // 点击无效
                    >
                        <Text
                            style={styles.linkButton}
                        >Next</Text>
                    </TouchableOpacity>
                }
                />