NSFileManager fileExistsAtPath:isDirectory和Swift
我试图了解如何使用函数fileExistsAtPath:isDirectory:
与斯威夫特,但我完全失去了。
这是我的代码示例:
var b:CMutablePointer<ObjCBool>? if (fileManager.fileExistsAtPath(fullPath, isDirectory:b! )){ // how can I use the "b" variable?! fileManager.createDirectoryAtURL(dirURL, withIntermediateDirectories: false, attributes: nil, error: nil) }
我不明白如何访问b
MutablePointer的值。 如果我想知道是否设置为YES
或NO
?
第二个参数的types为UnsafeMutablePointer<ObjCBool>
,这意味着你必须传递一个ObjCBool
variables的地址 。 例:
var isDir : ObjCBool = false if fileManager.fileExistsAtPath(fullPath, isDirectory:&isDir) { if isDir { // file exists and is a directory } else { // file exists and is not a directory } } else { // file does not exist }
Swift 3(Xcode 8.0)的更新:
let fileManager = FileManager.default var isDir : ObjCBool = false if fileManager.fileExists(atPath: fullPath, isDirectory:&isDir) { if isDir.boolValue { // file exists and is a directory } else { // file exists and is not a directory } } else { // file does not exist }