在Swift中获取文件大小
我尝试了几种方法来获取文件大小,但始终为零。
let path = NSBundle.mainBundle().pathForResource("movie", ofType: "mov")let attr = NSFileManager.defaultManager().attributesOfFileSystemForPath(path!, error: nil)
if let attr = attr {
let size: AnyObject? = attr[NSFileSize]
println("File size = \(size)")
}
我在日志中: File size = nil
回答:
使用attributesOfItemAtPath
而不是attributesOfFileSystemForPath
+调用attr上的.fileSize()。
var filePath: NSString = "your path here"var fileSize : UInt64
var attr:NSDictionary? = NSFileManager.defaultManager().attributesOfItemAtPath(filePath, error: nil)
if let _attr = attr {
fileSize = _attr.fileSize();
}
在Swift 2.0中,我们使用do try catch模式,如下所示:
let filePath = "your path here"var fileSize : UInt64 = 0
do {
let attr : NSDictionary? = try NSFileManager.defaultManager().attributesOfItemAtPath(filePath)
if let _attr = attr {
fileSize = _attr.fileSize();
}
} catch {
print("Error: \(error)")
}
在Swift 3.x / 4.0中:
let filePath = "your path here"var fileSize : UInt64
do {
//return [FileAttributeKey : Any]
let attr = try FileManager.default.attributesOfItem(atPath: filePath)
fileSize = attr[FileAttributeKey.size] as! UInt64
//if you convert to NSDictionary, you can get file size old way as well.
let dict = attr as NSDictionary
fileSize = dict.fileSize()
} catch {
print("Error: \(error)")
}
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