CGImageSourceCreateImageAtIndex(_:_:_:)
Creates an image object from the data at the specified index in an image source.
Declaration
func CGImageSourceCreateImageAtIndex(_ isrc: CGImageSource, _ index: Int, _ options: CFDictionary?) -> CGImage?Parameters
- isrc:
The image source that contains the image data.
- index:
The zero-based index of the image you want. If the index is invalid, this method returns
NULL. - options:
A dictionary that specifies additional creation options. For a list of possible values, see Cgimagesource.
Return Value
The image at the specified index, or NULL if an error occurs. You’re responsible for releasing the returned object using CGImageRelease.