使用場景

最新升級 Xcode 到最新版本 11.3诸典，執(zhí)行命令react-native run-ios會報(bào)錯

Found Xcode workspace taroDemo.xcworkspace
Could not find iPhone 6 simulator

網(wǎng)上無效方法

首先，你需要：
node_modules /反應(yīng)本地/本地CLI / runIOS / findMatchingSimulator.js
然后;
您需要更改此代碼
if (!version.startsWith('iOS') && !version.startsWith('tvOS'))
如下
if (version.indexOf('iOS') !== 0 && !version.includes('iOS')) { continue; }

最終解決方案

先說解決辦法
找到findMatchingSimulator.js
./node_modules/react-native/local-cli/runIOS/findMatchingSimulator.js

以下是修改后完整代碼

function findMatchingSimulator(simulators, simulatorName) {
  if (!simulators.devices) {
    return null;
  }
  const devices = simulators.devices;
  var match;
  for (let version in devices) {

    console.log(" version in devices ");
    console.log(version);

    // Making sure the version of the simulator is an iOS or tvOS (Removes Apple Watch, etc)
    if (!version.startsWith('com.apple.CoreSimulator.SimRuntime.iOS') && !version.startsWith('com.apple.CoreSimulator.SimRuntime.tvOS')) {
      continue;
    }
    for (let i in devices[version]) {
      let simulator = devices[version][i];
      // Skipping non-available simulator
      if (simulator.isAvailable !== true) {
        continue;
      }
      let booted = simulator.state === 'Booted';
      if (booted && simulatorName === null) {
        return {
          udid: simulator.udid,
          name: simulator.name,
          booted,
          version
        };
      }
      if (simulator.name === simulatorName && !match) {
        match = {
          udid: simulator.udid,
          name: simulator.name,
          booted,
          version
        };
      }
      // Keeps track of the first available simulator for use if we can't find one above.
      if (simulatorName === null && !match) {
        match = {
          udid: simulator.udid,
          name: simulator.name,
          booted,
          version
        };
      }
    }
  }
  if (match) {
    return match;
  }
  return null;
}

module.exports = findMatchingSimulator;

分析

最關(guān)鍵的地方是添加下面兩行代碼

    console.log(" version in devices ");
    console.log(version);

添加后執(zhí)行react-native run-ios搂蜓，可以看到模擬器版本信息

productdeMacBook-Pro:taro-native-shell product$ react-native run-ios
Scanning folders for symlinks in /Users/product/Desktop/taro-native-shell/node_modules (15ms)
Found Xcode workspace taroDemo.xcworkspace
 version in devices 
com.apple.CoreSimulator.SimRuntime.iOS-9-2
 version in devices 
com.apple.CoreSimulator.SimRuntime.iOS-10-3
 version in devices 
com.apple.CoreSimulator.SimRuntime.tvOS-13-3
 version in devices 
com.apple.CoreSimulator.SimRuntime.iOS-13-3
 version in devices 
com.apple.CoreSimulator.SimRuntime.watchOS-6-1
 version in devices 
com.apple.CoreSimulator.SimRuntime.iOS-8-1
 version in devices 
com.apple.CoreSimulator.SimRuntime.iOS-9-3
 version in devices 
com.apple.CoreSimulator.SimRuntime.iOS-12-1
 version in devices 
com.apple.CoreSimulator.SimRuntime.iOS-10-0

以上可以看到模擬器的版本信息
敲黑板, 劃重點(diǎn)
可以看到打印的信息，模擬器版本信息為
com.apple.CoreSimulator.SimRuntime.iOS-9-2
到這你肯定發(fā)現(xiàn)，上面修改代碼的地方了

對的網(wǎng)上找的大部分都是
if (!version.startsWith('iOS') && !version.startsWith('tvOS')){ continue; }
改成
if (version.indexOf('iOS') !== 0 && !version.includes('iOS')) { continue; }

打印后你會發(fā)現(xiàn)每次 xcode 版本不同模擬器也會不一樣圾另，所以修改后還是無效，我的 xcode 是 11.3雕沉，打印信息如上集乔，所以修改為
if (!version.startsWith('iOS') && !version.startsWith('tvOS')){ continue; }
改成
if (!version.startsWith('com.apple.CoreSimulator.SimRuntime.iOS') && !version.startsWith('com.apple.CoreSimulator.SimRuntime.tvOS')){ continue; }

還有一處判斷方法也需要修改
simulator.availability !== '(available)'
改成
if (simulator.isAvailable !== true)

以上就是解決辦法總結(jié)，也是網(wǎng)上找了很多辦法坡椒，最后還是在GitHub Error: Could not find iPhone 6 simulator #21498 上找到的希望對大家有用吧扰路，開發(fā)不易，希望大家都好好珍惜這段時(shí)光倔叼。