Type Method

imageRepWithContentsOfFile:

Creates and returns an image representation object using the contents of the specified file.

Declaration

+ (NSImageRep *)imageRepWithContentsOfFile:(NSString *)filename;

Parameters

filename

A full or relative pathname specifying the file to open. This string should include the filename extension.

Return Value

An initialized instance of an NSImageRep subclass, or nil if the image data could not be read.

Discussion

If sent to the NSImageRep class object, this method returns a newly allocated instance of a subclass of NSImageRep (chosen through the use of imageRepClassForFileType:) initialized with the contents of the specified file. If sent to a subclass of NSImageRep that recognizes the type of data in the file, it returns an instance of that subclass initialized with the contents of the file.

This method returns nil in any of the following cases:

  • The message is sent to the NSImageRep class object and there are no subclasses in the NSImageRep class registry that handle the type of data in the specified file.

  • The message is sent to a subclass of NSImageRep and that subclass cannot handle the type of data in the specified file.

  • The NSImageRep subclass is unable to initialize itself with the contents of the specified file.

The NSImageRep subclass is initialized by creating an NSData object based on the contents of the file and passing it to the imageRepWithData: method. By default, the files handled include those with the extensions “tiff”, “gif”, “jpg”, “pict”, “pdf”, and “eps”.

See Also

Creating an Image Representation

+ imageRepsWithContentsOfFile:

Creates and returns an array of image representation objects initialized using the contents of the specified file.

+ imageRepsWithPasteboard:

Creates and returns an array of image representation objects initialized using the contents of the pasteboard.

+ imageRepsWithContentsOfURL:

Creates and returns an array of image representation objects initialized using the contents of the specified URL.

+ imageRepWithPasteboard:

Creates and returns an image representation object using the contents of the specified pasteboard.

+ imageRepWithContentsOfURL:

Creates and returns an image representation object using the data at the specified URL