//獲取文件大小
func getSize(url: URL)->UInt64
{
var fileSize : UInt64 = 0
do {
let attr = try FileManager.default.attributesOfItem(atPath: url.path)
fileSize = attr[FileAttributeKey.size] as! UInt64
let dict = attr as NSDictionary
fileSize = dict.fileSize()
} catch {
print("Error: \(error)")
}
return fileSize
}
獲取之前最好先判斷下文件是否存在
FileManager.default.fileExists(atPath: path)
