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如何放入调试器以进行本机命令?

[英]How to drop into the debugger for a react-native command?

我正在开发一个React Native项目,如果尝试运行react-native run-ios会遇到以下错误,但出现错误Could not find iPhone 6 simulator

> react-native run-ios
Scanning folders for symlinks in /Users/kurtpeek/mobile/applicant-app/node_modules (16ms)
Found Xcode workspace applicant.xcworkspace

Could not find iPhone 6 simulator

但是,如果我运行xcrun simctl list --json devices ,此模拟器确实会显示,类似于在node_modules/react-native/local-cli/runIOS/runIOS.js

> xcrun simctl list --json devices | grep "\"iPhone 6\"" -B 5 -A 5
      },
      {
        "availability" : "(available)",
        "state" : "Shutdown",
        "isAvailable" : true,
        "name" : "iPhone 6",
        "udid" : "93E4D0AF-C267-406B-B8F5-B3B305BEBBF0",
        "availabilityError" : ""
      },
      {
        "availability" : "(available)",

上述文件中的runOnSimulator函数读取

function runOnSimulator(xcodeProject, args, scheme) {
  return new Promise((resolve) => {
    try {
      var simulators = JSON.parse(
      child_process.execFileSync('xcrun', ['simctl', 'list', '--json', 'devices'], {encoding: 'utf8'})
      );
    } catch (e) {
      throw new Error('Could not parse the simulator list output');
    }

    const selectedSimulator = findMatchingSimulator(simulators, args.simulator);
    if (!selectedSimulator) {
      throw new Error(`Could not find ${args.simulator} simulator`);
    }

因此,我想在node_modules/react-native/local-cli/runIOS/findMatchingSimulator.js设置调试器断点。 我试过简单地在其中放入debugger语句,如下所示:

function findMatchingSimulator(simulators, simulatorName) {
  debugger;

  if (!simulators.devices) {
    return null;
  }

但这不会启动调试器(例如,在Python中设置import pdb; pdb.set_trace() )。 如何调试react-native CLI命令?

您有2个选择:

  • 将您的macOS系统 Xcode升级到最新版本
  • react-native run-ios 之前打开模拟器应用程序/Applications/Xcode.app/Contents/Developer/Applications/Simulator.app

要启动debugger语句,您需要:

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