init(contentsOfURL:error:)
Initializes a newly allocated dictionary using the keys and values found at a given URL.
Declaration
convenience init(contentsOfURL url: URL, error: ()) throwsParameters
- url:
A URL that identifies a resource containing a string representation of a property list whose root object is a dictionary.
- error:
On failure, a reference to the error that occurred.
Return Value
An initialized dictionary that contains the dictionary at url, or nil if there is an error or if the contents of the resource are an invalid representation of a dictionary.
Discussion
The dictionary representation in the file identified by url must contain only property list objects (NSString, NSData, NSDate, NSNumber, NSArray, or NSDictionary objects). For more details, see Property List Programming Guide. The objects contained by this dictionary are immutable, even if the dictionary is mutable.
In Swift, this initializer throws if there is an error loading the URL, or if the contents of the resource are an invalid representation of a dictionary.