方法-isFileReferenceURL
定義在NSURL
類,但我無法弄清楚這個方法是什麼。我認爲這決定了URL是否指向實際的文件,但它不是。即使文件存在,它也會返回NO
。手冊上說的只是- [NSURL isFileReferenceURL]的功能是什麼?
isFileReferenceURL Returns whether the URL is a file reference URL.
- (BOOL)isFileReferenceURL Return Value YES if the URL is a file reference URL; otherwise, NO.
Availability Available in iOS 5.0 and later. (Symbol is present in iOS 4, but performs no operation.) Declared In NSURL.h
這是什麼方法?什麼是文件參考網址?這種方法何時返回YES
?
請注意,請參閱[' - [NSURL fileReferenceURL]'](https://developer.apple.com/library/mac/documentation/Cocoa/Reference/Foundation/Classes/NSURL_Class/Reference/Reference.html# // apple_ref/doc/uid/20000301-SW27)方法的更多信息: – Eonil