What is the difference between writeToFile and writeToURL?

Maybe some one can explain that over here or send to me to right docs?

I've read the IO开发者_如何学运维S docs, and Still can't get it, when do i use the writeToURL method. Maybe The problem is with me, if every else but me understand this, but if someone can help me with that, I would be very thankful :-)

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The difference is that writeToFile: needs an NSString and writeToURL: needs an NSURL. Apple recommends you use writeToURL:.

URLs can be both remote and local. You can use +[NSURL fileURLWithPath:].

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"Since at present only file:// URLs are supported, there is no difference between this method and writeToFile:atomically:, except for the type of the first argument."

https://developer.apple.com/library/mac/documentation/Cocoa/Reference/Foundation/Classes/NSData_Class/#//apple_ref/occ/instm/NSData/writeToURL:atomically: