1.在<View>中跳转，将View改成TouchableOpacity，MyOrder是要跳转的页面名字
<TouchableOpacity onPress={() =>this.props.navigation.navigate('MyOrder')}>
2.在<Text>中跳转，onPress={()=>this.props.navigation.navigate('这里是要跳转的页面')}固定写法
<Text onPress={()=>this.props.navigation.navigate('Course')}>查看全部</Text>
3.页面左上角的返回上一级<
<TouchableOpacity onPress={() => this.props.navigation.goBack()}>