Troubleshooting PubNub Swift SDK

How to enable logging

Use the following code to enable logging:

PubNub.log.levels = [.all]
PubNub.log.writers = [ConsoleLogWriter(), FileLogWriter()]

PubNub log runner

The PubNub log runner is a singleton instance, and should be configured once at the beginning of your application's lifecycle. Changing log properties will overwrite their previous entries.

Using Log Writers

You can configure log levels by assigning the PubNub.log.writers array property to your desired log levels.

Enabling console and file output

Use the following code to enable console and file output:

PubNub.log.writers = [ConsoleLogWriter(), FileLogWriter()]

By default, the FileLogWriter attempts to log to the user's cache directory. For more information, refer to the Apple documentation on the domain constants and search paths for the significant directories.

Logging to a Custom Location

Use the following code to enable log file output using a URL:

if let url = URL(string: "file:///path/to/pubnub/logs/") {
  PubNub.log.writers = [FileLogWriter(logDirectory: url)]
}

Use the following code to enable file output using FileManager

PubNub.log.writers = [FileLogWriter(inside: .allDomainsMask, at: .applicationDirectory, with: 'directoryName')]

Creating custom log writers

You can create a custom log writer if you want to output logs to a location other than the console or local file system.

To create a custom log writer, implement the LogWriter protocol, then add an instance of your custom writer to the PubNub.log.writers property.

Log Level Reference

Log levels are as follows:

Log Level	Bitmask	Description
none	0	Logging is disabled.
debug	1 << 0	May be useful during development or while troubleshooting a specific problem. Warning! Debug logging is intended for use in a development environment. Don't use it shipping software.
info	1 << 1	Information that may be helpful, but isn't essential, for troubleshooting errors.
event	1 << 2	Logs as part of an event stream
warn	1 << 3	Designates potentially harmful situations.
error	1 << 4	Error-level messages are intended for reporting process-level errors. If an activity object exists, logging at this level captures information for the entire process chain.
log	1 << 31	This is a special category used to log errors that occur internal to the logger.
all	UInt32.max	All log levels will be captured

Setting log levels

Configure log levels by assigning the PubNub.log.levels array property to your desired log levels, as in the following examples.

Enable all logging

PubNub.log.levels = [.all]

Enable only error logging

PubNub.log.levels = [.error]

Enable non-debug level logging

PubNub.log.levels = [.log, .error, .warn, .event, .info]

Disable logging with either of the following

PubNub.log.levels = [.none]

// Or this:

PubNub.log.levels = []