1. jar包下载不了，一直超时
解决办法：在android文件夹下找到build.gradle文件，在repositories里面
maven { url 'http://maven.aliyun.com/nexus/content/groups/public/' }如下图：
2. 启动项目报SDK找不到
找到自己下载的sdk目录，在android文件夹下添加
local.properties文件（放的sdk所在的目录），如下图是我的SDK所在目录
3. JetBrains WebStorm 2019.2.4 配置RN环境遇到的问题
- 没有代码提示
解决办法： 添加如下图插件：
按箭头指示方向添加插件。
- 在App.js文件写内容出现红色波浪线
解决办法： 
替换如下文件。
{
"root": true,
"parser": "babel-eslint",
"env": {
"es6": true,
"jest": true
},
"plugins": [
"eslint-comments",
"flowtype",
"prettier",
"react",
"react-native",
"jest"
],
// Map from global var to bool specifying if it can be redefined
"globals": {
"__DEV__": true,
"__dirname": false,
"__fbBatchedBridgeConfig": false,
"alert": false,
"cancelAnimationFrame": false,
"cancelIdleCallback": false,
"clearImmediate": true,
"clearInterval": false,
"clearTimeout": false,
"console": false,
"document": false,
"escape": false,
"Event": false,
"EventTarget": false,
"exports": false,
"fetch": false,
"FormData": false,
"global": false,
"jest": false,
"Map": true,
"module": false,
"navigator": false,
"process": false,
"Promise": true,
"requestAnimationFrame": true,
"requestIdleCallback": true,
"require": false,
"Set": true,
"setImmediate": true,
"setInterval": false,
"setTimeout": false,
"window": false,
"XMLHttpRequest": false,
"pit": false,
"jasmine": true
},
"rules": {
// General
"comma-dangle": [
1,
"always-multiline"
], // allow or disallow trailing commas
"no-cond-assign": 1, // disallow assignment in conditional expressions
"no-console": 0, // disallow use of console (off by default in the node environment)
"no-const-assign": 2, // disallow assignment to const-declared variables
"no-constant-condition": 0, // disallow use of constant expressions in conditions
"no-control-regex": 1, // disallow control characters in regular expressions
"no-debugger": 1, // disallow use of debugger
"no-dupe-class-members": 2, // Disallow duplicate name in class members
"no-dupe-keys": 2, // disallow duplicate keys when creating object literals
"no-empty": 0, // disallow empty statements
"no-ex-assign": 1, // disallow assigning to the exception in a catch block
"no-extra-boolean-cast": 1, // disallow double-negation boolean casts in a boolean context
"no-extra-parens": 0, // disallow unnecessary parentheses (off by default)
"no-extra-semi": 1, // disallow unnecessary semicolons
"no-func-assign": 1, // disallow overwriting functions written as function declarations
"no-inner-declarations": 0, // disallow function or variable declarations in nested blocks
"no-invalid-regexp": 1, // disallow invalid regular expression strings in the RegExp constructor
"no-negated-in-lhs": 1, // disallow negation of the left operand of an in expression
"no-obj-calls": 1, // disallow the use of object properties of the global object (Math and JSON) as functions
"no-regex-spaces": 1, // disallow multiple spaces in a regular expression literal
"no-reserved-keys": 0, // disallow reserved words being used as object literal keys (off by default)
"no-sparse-arrays": 1, // disallow sparse arrays
"no-unreachable": 2, // disallow unreachable statements after a return, throw, continue, or break statement
"use-isnan": 1, // disallow comparisons with the value NaN
"valid-jsdoc": 0, // Ensure JSDoc comments are valid (off by default)
"valid-typeof": 1, // Ensure that the results of typeof are compared against a valid string
// Best Practices
// These are rules designed to prevent you from making mistakes. They either prescribe a better way of doing something or help you avoid footguns.
"block-scoped-var": 0, // treat var statements as if they were block scoped (off by default)
"complexity": 0, // specify the maximum cyclomatic complexity allowed in a program (off by default)
"consistent-return": 0, // require return statements to either always or never specify values
"curly": 1, // specify curly brace conventions for all control statements
"default-case": 0, // require default case in switch statements (off by default)
"dot-notation": 1, // encourages use of dot notation whenever possible
"eqeqeq": [
1,
"allow-null"
], // require the use of === and !==
"guard-for-in": 0, // make sure for-in loops have an if statement (off by default)
"no-alert": 1, // disallow the use of alert, confirm, and prompt
"no-caller": 1, // disallow use of arguments.caller or arguments.callee
"no-div-regex": 1, // disallow division operators explicitly at beginning of regular expression (off by default)
"no-else-return": 0, // disallow else after a return in an if (off by default)
"no-eq-null": 0, // disallow comparisons to null without a type-checking operator (off by default)
"no-eval": 2, // disallow use of eval()
"no-extend-native": 1, // disallow adding to native types
"no-extra-bind": 1, // disallow unnecessary function binding
"no-fallthrough": 1, // disallow fallthrough of case statements
"no-floating-decimal": 1, // disallow the use of leading or trailing decimal points in numeric literals (off by default)
"no-implied-eval": 1, // disallow use of eval()-like methods
"no-labels": 1, // disallow use of labeled statements
"no-iterator": 1, // disallow usage of __iterator__ property
"no-lone-blocks": 1, // disallow unnecessary nested blocks
"no-loop-func": 0, // disallow creation of functions within loops
"no-multi-str": 0, // disallow use of multiline strings
"no-native-reassign": 0, // disallow reassignments of native objects
"no-new": 1, // disallow use of new operator when not part of the assignment or comparison
"no-new-func": 2, // disallow use of new operator for Function object
"no-new-wrappers": 1, // disallows creating new instances of String,Number, and Boolean
"no-octal": 1, // disallow use of octal literals
"no-octal-escape": 1, // disallow use of octal escape sequences in string literals, such as var foo = "Copyright \251";
"no-proto": 1, // disallow usage of __proto__ property
"no-redeclare": 0, // disallow declaring the same variable more then once
"no-return-assign": 1, // disallow use of assignment in return statement
"no-script-url": 1, // disallow use of javascript: urls.
"no-self-compare": 1, // disallow comparisons where both sides are exactly the same (off by default)
"no-sequences": 1, // disallow use of comma operator
"no-unused-expressions": 0, // disallow usage of expressions in statement position
"no-void": 1, // disallow use of void operator (off by default)
"no-warning-comments": 0, // disallow usage of configurable warning terms in comments": 1, // e.g. TODO or FIXME (off by default)
"no-with": 1, // disallow use of the with statement
"radix": 1, // require use of the second argument for parseInt() (off by default)
"semi-spacing": 1, // require a space after a semi-colon
"vars-on-top": 0, // requires to declare all vars on top of their containing scope (off by default)
"wrap-iife": 0, // require immediate function invocation to be wrapped in parentheses (off by default)
"yoda": 1, // require or disallow Yoda conditions
// Variables
// These rules have to do with variable declarations.
"no-catch-shadow": 1, // disallow the catch clause parameter name being the same as a variable in the outer scope (off by default in the node environment)
"no-delete-var": 1, // disallow deletion of variables
"no-label-var": 1, // disallow labels that share a name with a variable
"no-shadow": 1, // disallow declaration of variables already declared in the outer scope
"no-shadow-restricted-names": 1, // disallow shadowing of names such as arguments
"no-undef": 2, // disallow use of undeclared variables unless mentioned in a /*global */ block
"no-undefined": 0, // disallow use of undefined variable (off by default)
"no-undef-init": 1, // disallow use of undefined when initializing variables
"no-unused-vars": [
1,
{
"vars": "all",
"args": "none", "ignoreRestSiblings": true
}
], // disallow declaration of variables that are not used in the code
"no-use-before-define": 0, // disallow use of variables before they are defined
// Node.js
// These rules are specific to JavaScript running on Node.js.
"handle-callback-err": 1, // enforces error handling in callbacks (off by default) (on by default in the node environment)
"no-mixed-requires": 1, // disallow mixing regular variable and require declarations (off by default) (on by default in the node environment)
"no-new-require": 1, // disallow use of new operator with the require function (off by default) (on by default in the node environment)
"no-path-concat": 1, // disallow string concatenation with __dirname and __filename (off by default) (on by default in the node environment)
"no-process-exit": 0, // disallow process.exit() (on by default in the node environment)
"no-restricted-modules": 1, // restrict usage of specified node modules (off by default)
"no-sync": 0, // disallow use of synchronous methods (off by default)
// ESLint Comments Plugin
// The following rules are made available via `eslint-plugin-eslint-comments`
"eslint-comments/no-aggregating-enable": 1, // disallows eslint-enable comments for multiple eslint-disable comments
"eslint-comments/no-unlimited-disable": 1, // disallows eslint-disable comments without rule names
"eslint-comments/no-unused-disable": 1, // disallow disables that don't cover any errors
"eslint-comments/no-unused-enable": 1, // // disallow enables that don't enable anything or enable rules that weren't disabled
// Flow Plugin
// The following rules are made available via `eslint-plugin-flowtype`
"flowtype/define-flow-type": 1,
"flowtype/use-flow-type": 1,
// Prettier Plugin
// https://github.com/prettier/eslint-plugin-prettier
// "prettier/prettier": [
// 2,
// "fb",
// "@format"
// ],
// Stylistic Issues
// These rules are purely matters of style and are quite subjective.
"key-spacing": 0,
"keyword-spacing": 1, // enforce spacing before and after keywords
"jsx-quotes": [
1,
"prefer-double"
], // enforces the usage of double quotes for all JSX attribute values which doesn’t contain a double quote
"comma-spacing": 0,
"no-multi-spaces": 0,
"brace-style": 0, // enforce one true brace style (off by default)
"camelcase": 0, // require camel case names
"consistent-this": 1, // enforces consistent naming when capturing the current execution context (off by default)
"eol-last": 1, // enforce newline at the end of file, with no multiple empty lines
"func-names": 0, // require function expressions to have a name (off by default)
"func-style": 0, // enforces use of function declarations or expressions (off by default)
"new-cap": 0, // require a capital letter for constructors
"new-parens": 1, // disallow the omission of parentheses when invoking a constructor with no arguments
"no-nested-ternary": 0, // disallow nested ternary expressions (off by default)
"no-array-constructor": 1, // disallow use of the Array constructor
"no-empty-character-class": 1, // disallow the use of empty character classes in regular expressions
"no-lonely-if": 0, // disallow if as the only statement in an else block (off by default)
"no-new-object": 1, // disallow use of the Object constructor
"no-spaced-func": 1, // disallow space between function identifier and application
"no-ternary": 0, // disallow the use of ternary operators (off by default)
"no-trailing-spaces": 1, // disallow trailing whitespace at the end of lines
"no-underscore-dangle": 0, // disallow dangling underscores in identifiers
"no-mixed-spaces-and-tabs": 1, // disallow mixed spaces and tabs for indentation
"quotes": [
1,
"single",
"avoid-escape"
], // specify whether double or single quotes should be used
"quote-props": 0, // require quotes around object literal property names (off by default)
"semi": 1, // require or disallow use of semicolons instead of ASI
"sort-vars": 0, // sort variables within the same declaration block (off by default)
"space-in-brackets": 0, // require or disallow spaces inside brackets (off by default)
"space-in-parens": 0, // require or disallow spaces inside parentheses (off by default)
"space-infix-ops": 1, // require spaces around operators
"space-unary-ops": [
1,
{
"words": true,
"nonwords": false
}
], // require or disallow spaces before/after unary operators (words on by default, nonwords off by default)
"max-nested-callbacks": 0, // specify the maximum depth callbacks can be nested (off by default)
"one-var": 0, // allow just one var statement per function (off by default)
"wrap-regex": 0, // require regex literals to be wrapped in parentheses (off by default)
// Legacy
// The following rules are included for compatibility with JSHint and JSLint. While the names of the rules may not match up with the JSHint/JSLint counterpart, the functionality is the same.
"max-depth": 0, // specify the maximum depth that blocks can be nested (off by default)
"max-len": 0, // specify the maximum length of a line in your program (off by default)
"max-params": 0, // limits the number of parameters that can be used in the function declaration. (off by default)
"max-statements": 0, // specify the maximum number of statement allowed in a function (off by default)
"no-bitwise": 1, // disallow use of bitwise operators (off by default)
"no-plusplus": 0, // disallow use of unary operators, ++ and -- (off by default)
// React Plugin
// The following rules are made available via `eslint-plugin-react`.
"react/display-name": 0,
"react/jsx-boolean-value": 0,
"react/jsx-no-comment-textnodes": 1,
"react/jsx-no-duplicate-props": 2,
"react/jsx-no-undef": 2,
"react/jsx-sort-props": 0,
"react/jsx-uses-react": 1,
"react/jsx-uses-vars": 1,
"react/no-did-mount-set-state": 1,
"react/no-did-update-set-state": 1,
"react/no-multi-comp": 0,
"react/no-string-refs": 1,
"react/no-unknown-property": 0,
"react/prop-types": 0,
"react/react-in-jsx-scope": 1,
"react/self-closing-comp": 1,
"react/wrap-multilines": 0,
// React-Native Plugin
// The following rules are made available via `eslint-plugin-react-native`
"react-native/no-inline-styles": 1,
// Jest Plugin
// The following rules are made available via `eslint-plugin-jest`.
"jest/no-disabled-tests": 1,
"jest/no-focused-tests": 1,
"jest/no-identical-title": 1,
"jest/valid-expect": 1
},
"overrides": [
{
"files": [
"local-cli/**/*.js"
],
"rules": {
"lint/extra-arrow-initializer": 0,
"no-alert": 0,
"no-console-disallow": 0
},
"env": {
"node": true
}
}
]
}
- JetBrains WebStorm 2019.2.4 配置运行环境
按百度出来的一步一步操作，到箭头指的那一步应该添加**React-native.cmd**,而不是React-native。
4. 首次运行报错
Unable to load script. Make sure you're either running a Metro server (run 'react-native start') or that your bundle 'index.android.bundle' is packaged correctly for release.
解决办法：查看node版本，我的版本是12.13.1，版本太高了，然后我降低到v10.13.0版本就可以了。晚上说的解决办法都试了一遍，完全没用。
5. PermissionsAndroid使用不会调起系统权限弹窗
解决办法：确认下Android项目配置文件
AndroidManifest是否添加了相应权限。
6. 打包报错
Execution failed for task ‘:react-native-picker:verifyReleaseResources’.
解决办法：首先在node_modules中找到报错的包里面的build.gradle，比如我这个react-native-picker，然后修改compileSdkVersion与项目Android/app/build.gradle保持一致
底部导航结合顶部导航跳转问题
打印
this.props.navigation一直是undefined。
点击跳转项目报错ReactNativeJS: TypeError: undefined is not an object (evaluating '_this.props.navigation.navigate')扫描二维码关注公众号，回复： 11471452 查看本文章
解决方案：在承载导航的页面里面传入navigation={this.props.navigation}，例如下图：
