Question

例如，我想检查：Users / username / Desktop /文件夹是否为空，或者更好地检查它是否包含扩展名为.png的文件？

我真的很新，但如果有人知道请帮帮我:)。

Answer 1

使用contentsOfDirectoryAtPath获取directoly中所有文件的列表，然后过滤.png个文件的数组

let path = "/Users/username/Desktop/folder"
do {
    let contents = try NSFileManager.defaultManager().contentsOfDirectoryAtPath(path)
    let images = contents.filter { $0.lowercaseString.hasSuffix(".png") }
} catch let error as NSError {
    // Directory not exist, no permission, etc.
    print(error.localizedDescription)
}

Answer 2

let fileManager = NSFileManager.defaultManager()
let folderPath = "/Users/username/Desktop/folder"

if let contentEnumerator:NSDirectoryEnumerator = fileManager.enumeratorAtPath(folderPath) {
    var numFilesWithSuffix = 0
    let mySuffix = "png"
    while let fileOrFolder = contentEnumerator.nextObject() as? String {
        if fileOrFolder.hasSuffix(mySuffix) {
            numFilesWithSuffix += 1 // count occurences
        }
    }
}

是否可以检查Swift 2.1中的目录是否为空？

2 个答案: