Я нашел решение. Я создал файл RCTLog.h, это заголовочный файл, в том же каталоге, что и AppDelegate.m. RCTLog.h:
/*
* Copyright (c) Facebook, Inc. and its affiliates.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*/
#import <Foundation/Foundation.h>
#import <React/RCTAssert.h>
#import <React/RCTDefines.h>
#import <React/RCTUtils.h>
#ifndef RCTLOG_ENABLED
#define RCTLOG_ENABLED 1
#endif
/**
* Thresholds for logs to display a redbox. You can override these values when debugging
* in order to tweak the default logging behavior.
*/
#ifndef RCTLOG_REDBOX_LEVEL
#define RCTLOG_REDBOX_LEVEL RCTLogLevelError
#endif
/**
* Logging macros. Use these to log information, warnings and errors in your
* own code.
*/
#define RCTLog(...) _RCTLog(RCTLogLevelInfo, __VA_ARGS__)
#define RCTLogTrace(...) _RCTLog(RCTLogLevelTrace, __VA_ARGS__)
#define RCTLogInfo(...) _RCTLog(RCTLogLevelInfo, __VA_ARGS__)
#define RCTLogAdvice(string, ...) RCTLogWarn([@"(ADVICE) " stringByAppendingString:(NSString *)string], __VA_ARGS__)
#define RCTLogWarn(...) _RCTLog(RCTLogLevelWarning, __VA_ARGS__)
#define RCTLogError(...) _RCTLog(RCTLogLevelError, __VA_ARGS__)
/**
* An enum representing the severity of the log message.
*/
typedef NS_ENUM(NSInteger, RCTLogLevel) {
RCTLogLevelTrace = 0,
RCTLogLevelInfo = 1,
RCTLogLevelWarning = 2,
RCTLogLevelError = 3,
RCTLogLevelFatal = 4
};
/**
* An enum representing the source of a log message.
*/
typedef NS_ENUM(NSInteger, RCTLogSource) {
RCTLogSourceNative = 1,
RCTLogSourceJavaScript = 2
};
/**
* A block signature to be used for custom logging functions. In most cases you
* will want to pass these arguments to the RCTFormatLog function in order to
* generate a string.
*/
typedef void (^RCTLogFunction)(
RCTLogLevel level,
RCTLogSource source,
NSString *fileName,
NSNumber *lineNumber,
NSString *message
);
/**
* A method to generate a string from a collection of log data. To omit any
* particular data from the log, just pass nil or zero for the argument.
*/
RCT_EXTERN NSString *RCTFormatLog(
NSDate *timestamp,
RCTLogLevel level,
NSString *fileName,
NSNumber *lineNumber,
NSString *message
);
/**
* A method to generate a string RCTLogLevel
*/
RCT_EXTERN NSString *RCTFormatLogLevel(RCTLogLevel);
/**
* A method to generate a string from a RCTLogSource
*/
RCT_EXTERN NSString *RCTFormatLogSource(RCTLogSource);
/**
* The default logging function used by RCTLogXX.
*/
extern RCTLogFunction RCTDefaultLogFunction;
/**
* These methods get and set the global logging threshold. This is the level
* below which logs will be ignored. Default is RCTLogLevelInfo for debug and
* RCTLogLevelError for production.
*/
RCT_EXTERN void RCTSetLogThreshold(RCTLogLevel threshold);
RCT_EXTERN RCTLogLevel RCTGetLogThreshold(void);
/**
* These methods get and set the global logging function called by the RCTLogXX
* macros. You can use these to replace the standard behavior with custom log
* functionality.
*/
RCT_EXTERN void RCTSetLogFunction(RCTLogFunction logFunction);
RCT_EXTERN RCTLogFunction RCTGetLogFunction(void);
/**
* This appends additional code to the existing log function, without replacing
* the existing functionality. Useful if you just want to forward logs to an
* extra service without changing the default behavior.
*/
RCT_EXTERN void RCTAddLogFunction(RCTLogFunction logFunction);
/**
* This method temporarily overrides the log function while performing the
* specified block. This is useful for testing purposes (to detect if a given
* function logs something) or to suppress or override logging temporarily.
*/
RCT_EXTERN void RCTPerformBlockWithLogFunction(void (^block)(void), RCTLogFunction logFunction);
/**
* This method adds a conditional prefix to any messages logged within the scope
* of the passed block. This is useful for adding additional context to log
* messages. The block will be performed synchronously on the current thread.
*/
RCT_EXTERN void RCTPerformBlockWithLogPrefix(void (^block)(void), NSString *prefix);
/**
* Private logging function - ignore this.
*/
#if RCTLOG_ENABLED
#define _RCTLog(lvl, ...) _RCTLogNativeInternal(lvl, __FILE__, __LINE__, __VA_ARGS__)
#else
#define _RCTLog(lvl, ...) do { } while (0)
#endif
RCT_EXTERN void _RCTLogNativeInternal(RCTLogLevel, const char *, int, NSString *, ...) NS_FORMAT_FUNCTION(4,5);
RCT_EXTERN void _RCTLogJavaScriptInternal(RCTLogLevel, NSString *);