What is NSError domain?
The core attributes of an NSError object—or, simply, an error object—are an error domain, a domain-specific error code, and a “user info” dictionary containing objects related to the error, most significantly description and recovery strings. …
What is NSError code?
code & domain Like exit status codes, an NSError -code signals the nature of the problem. These status codes are defined within a particular error domain , in order to avoid overlap and confusion. These status codes are generally defined by constants in an enum .
What is NSError object made of?
The core attributes of an NSError object are an error domain (represented by a string), a domain-specific error code and a user info dictionary containing application specific information.
What causes Nsurlerrorcancelled?
The URL Loading System received bad data from the server. A malformed URL prevented a URL request from being initiated. Content data received during a connection request couldn’t be decoded for a known content encoding.
What is the error domain used by nserror?
A string to display in response to an alert panel help anchor button being pressed. The error domain used by NSError when reporting SOCKS errors. The error domain used by NSError when reporting SSL errors. Describes errors within the Cocoa error domain. Describes an error in the Mach error domain.
Which is the core of an nserror object?
The core of an NSError object—or, simply, an error object—are an error domain, a domain-specific error code, and a “user info” containing objects related to the error, most significantly description and recovery strings. This chapter explains the reason for error objects, describes their attributes, and discusses how you use them in Cocoa code.
Where can I find the nsurlerrordomain error codes?
The NSURLErrorDomain error codes are listed here https://developer.apple.com/documentation/foundation/1508628-url_loading_system_error_codes However, 400 is just the http status code ( http://www.w3.org/Protocols/HTTP/HTRESP.html) being returned which means you’ve got something wrong with your request.
How to pass an error to an nserror?
To pass an error to an NSError ** parameter, do the following: The root error, if one exists, should be returned as part of your custom error’s userInfo dictionary as the value for NSUnderlyingErrorKey. The greatest source of failure in iOS apps is networking.
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