Question

我正在按下按钮将数据从一个屏幕传递到另一个屏幕。我在另一个屏幕上显示数据时遇到问题......

以下是我的代码：

home.js

import React, { Component } from "react";
  import { View, Text } from "react-native";

  export default class Products extends Component {
    static navigationOptions = {
      title: "Products",
    };

    render() {
      return (
              const { params } = this.props.navigation.state;

        <View>
          <Text>{this.params.shareproductid}</Text>

        </View>
      );
    }
  }

Products.js

shareproductid

在这个Products.js中我必须显示C:\> pip install -U pip scipy Collecting scipy Using cached scipy-0.19.1.tar.gz Installing collected packages: scipy Running setup.py install for scipy: started Running setup.py install for scipy: finished with status 'error' Complete output from command c:\users\ra291145\appdata\local\programs\python\python35-32\python.exe -u -c "import setuptools, tokenize;__file__='C:\\Users\\ra291145\\AppData\\Local\\Temp\\pip-build-6za81n9x\\scipy\\setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" install --record C:\Users\ra291145\AppData\Local\Temp\pip-m873sujh-record\install-record.txt --single-version-externally-managed --compile: Note: if you need reliable uninstall behavior, then install with pip instead of using `setup.py install`: - `pip install .` (from a git repo or downloaded source release) - `pip install scipy` (last SciPy release on PyPI) lapack_opt_info: lapack_mkl_info: libraries mkl_rt not found in ['c:\\users\\ra291145\\appdata\\local\\programs\\python\\python35-32\\lib', 'C:\\', 'c:\\users\\ra291145\\appdata\\local\\programs\\python\\python35-32\\libs'] NOT AVAILABLE openblas_lapack_info: libraries openblas not found in ['c:\\users\\ra291145\\appdata\\local\\programs\\python\\python35-32\\lib', 'C:\\', 'c:\\users\\ra291145\\appdata\\local\\programs\\python\\python35-32\\libs'] NOT AVAILABLE atlas_3_10_threads_info: Setting PTATLAS=ATLAS c:\users\ra291145\appdata\local\programs\python\python35-32\lib\site-packages\numpy\distutils\system_info.py:1051: UserWarning: Specified path C:\projects\numpy-wheels\windows-wheel-builder\atlas-builds\atlas-3.10.1-sse2-32\lib is invalid. pre_dirs = system_info.get_paths(self, section, key) <class 'numpy.distutils.system_info.atlas_3_10_threads_info'> NOT AVAILABLE atlas_3_10_info: <class 'numpy.distutils.system_info.atlas_3_10_info'> NOT AVAILABLE atlas_threads_info: Setting PTATLAS=ATLAS <class 'numpy.distutils.system_info.atlas_threads_info'> NOT AVAILABLE atlas_info: <class 'numpy.distutils.system_info.atlas_info'> NOT AVAILABLE c:\users\ra291145\appdata\local\programs\python\python35-32\lib\site-packages\numpy\distutils\system_info.py:572: UserWarning: Atlas (http://math-atlas.sourceforge.net/) libraries not found. Directories to search for the libraries can be specified in the numpy/distutils/site.cfg file (section [atlas]) or by setting the ATLAS environment variable. self.calc_info() lapack_info: libraries lapack not found in ['c:\\users\\ra291145\\appdata\\local\\programs\\python\\python35-32\\lib', 'C:\\', 'c:\\users\\ra291145\\appdata\\local\\programs\\python\\python35-32\\libs'] NOT AVAILABLE c:\users\ra291145\appdata\local\programs\python\python35-32\lib\site-packages\numpy\distutils\system_info.py:572: UserWarning: Lapack (http://www.netlib.org/lapack/) libraries not found. Directories to search for the libraries can be specified in the numpy/distutils/site.cfg file (section [lapack]) or by setting the LAPACK environment variable. self.calc_info() lapack_src_info: NOT AVAILABLE c:\users\ra291145\appdata\local\programs\python\python35-32\lib\site-packages\numpy\distutils\system_info.py:572: UserWarning: Lapack (http://www.netlib.org/lapack/) sources not found. Directories to search for the sources can be specified in the numpy/distutils/site.cfg file (section [lapack_src]) or by setting the LAPACK_SRC environment variable. self.calc_info() NOT AVAILABLE Running from scipy source directory. non-existing path in 'scipy\\integrate': 'quadpack.h' Traceback (most recent call last): File "<string>", line 1, in <module> File "C:\Users\ra291145\AppData\Local\Temp\pip-build-6za81n9x\scipy\setup.py", line 416, in <module> setup_package() File "C:\Users\ra291145\AppData\Local\Temp\pip-build-6za81n9x\scipy\setup.py", line 412, in setup_package setup(**metadata) File "c:\users\ra291145\appdata\local\programs\python\python35-32\lib\site-packages\numpy\distutils\core.py", line 135, in setup config = configuration() File "C:\Users\ra291145\AppData\Local\Temp\pip-build-6za81n9x\scipy\setup.py", line 336, in configuration config.add_subpackage('scipy') File "c:\users\ra291145\appdata\local\programs\python\python35-32\lib\site-packages\numpy\distutils\misc_util.py", line 1029, in add_subpackage caller_level = 2) File "c:\users\ra291145\appdata\local\programs\python\python35-32\lib\site-packages\numpy\distutils\misc_util.py", line 998, in get_subpackage caller_level = caller_level + 1) File "c:\users\ra291145\appdata\local\programs\python\python35-32\lib\site-packages\numpy\distutils\misc_util.py", line 935, in _get_configuration_from_setup_py config = setup_module.configuration(*args) File "scipy\setup.py", line 15, in configuration config.add_subpackage('linalg') File "c:\users\ra291145\appdata\local\programs\python\python35-32\lib\site-packages\numpy\distutils\misc_util.py", line 1029, in add_subpackage caller_level = 2) File "c:\users\ra291145\appdata\local\programs\python\python35-32\lib\site-packages\numpy\distutils\misc_util.py", line 998, in get_subpackage caller_level = caller_level + 1) File "c:\users\ra291145\appdata\local\programs\python\python35-32\lib\site-packages\numpy\distutils\misc_util.py", line 935, in _get_configuration_from_setup_py config = setup_module.configuration(*args) File "scipy\linalg\setup.py", line 20, in configuration raise NotFoundError('no lapack/blas resources found') numpy.distutils.system_info.NotFoundError: no lapack/blas resources found ---------------------------------------- ←[31mCommand "c:\users\ra291145\appdata\local\programs\python\python35-32\python.exe -u -c "import setuptools, tokenize;__file__='C:\\Users\\ra291145\\AppData\\Local\\Temp\\pip-build-6za81n9x\\scipy\\setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" install --record C:\Users\ra291145\AppData\Local\Temp\pip-m873sujh-record\install-record.txt --single-version-externally-managed --compile" failed with error code 1 in C:\Users\ra291145\AppData\Local\Temp\pip-build-6za81n9x\scipy\←[0m所以如何显示它请帮助......

Answer 1

传递的参数必须是一个对象：

goPressed(shareproductid) {
  const { navigate } = this.props.navigation;
  const params = { shareproductid };

  navigate('Products', params);
}

并在 Products.js 中捕获它们，如下所示：

render() {
  const { params } = this.props.navigation.state;

  return (
    <View>
      <Text>{ params.shareproductid }</Text>
    </View>
  );
}

如何在第二屏幕中显示从第一屏幕到第二屏幕的数据

1 个答案: