我试图理解如何使用函数fileExistsAtPath:isDirectory:with Swift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。如果我想知道它是否设置为YES或NO?
第二个参数的类型是UnsafeMutablePointer< ObjCBool> ;,这意味着
你必须传递一个ObjCBool变量的地址。例:
你必须传递一个ObjCBool变量的地址。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
}
更新Swift 3(Xcode 8.0):
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
}