NSFileManager.defaultManager().fileExistsAtPath返回false而不是true

Question

这怎么可能？

let exists = NSFileManager.defaultManager().fileExistsAtPath(path.absoluteString)
print("exists: \(exists)") //false

这是 path.absoluteString

//file:///Users/kuna/Library/Developer/CoreSimulator/Devices/92BD140D-5C14-43C4-80D6-904BB9594ED6/data/Containers/Data/Application/5B818832-BB19-4047-A7F8-1487F36868D6/Documents/wishlists/68/147/128/IMG_0006.PNG

你可以看到它应该在哪里:

到底是怎么回事？

Answer 1

(此答案中的代码已针对Swift 3及更高版本进行了更新.)

显然你的path变量是NSURL(描述文件路径).要将路径作为字符串,请使用path属性,而不是absoluteString:

let exists = FileManager.default.fileExists(atPath: path.path)

absoluteString以字符串格式返回URL,包括file:方案等.

例:

let url = URL(fileURLWithPath: "/path/to/foo.txt")

// This is what you did:
print(url.absoluteString)
// Output:    file:///path/to/foo.txt

// This is what you want:
print(url.path)
// Output:    /path/to/foo.txt

Answer 2

如果要检查路径是否存在，则应检查路径

let url = NSURL(string: "balabala")

let path = url?.path
//Check path