[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:
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:
⌘ + D
>远程调试,在http:// localhost:8081 / debugger-ui /上打开Google Chrome, 然后使用⌘ + ⌥ + J
打开JavaScript工具
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