Creates a data object containing the data from the location specified by a given URL.
- iOS 2.0+
- macOS 10.0+
- tvOS 9.0+
- watchOS 2.0+
The URL from which to read data.
Use this method to convert
data:// URLs to NSData objects. You can also use it to read short files synchronously. If you need to read potentially large files, use
input to open a stream, then read the file incrementally.
This method may fail and return
nil for various reasons, like bad URLs and file-not-found errors. If you want to handle these errors, use