Dropbox API试图使用Swifthydropbox库列出不存在的文件夹，作为错误处理的示例
示例
// 列表文件夹
Dropbox.authorizedClient!.files.listFolder(path: "/nonexistantpath").response { response, error in
print("*** List folder ***")
if let result = response {
print("文件夹内容：")
for entry inresult.entries{
print(entry.name)
}
} else if let callError = error {
switch callError {
case .RouteError(let boxed, _):
switchboxed.unboxed{
case .Path(let lookupError):
print("lookupError:")
print(lookupError)
case .Other:
print("Other")
}
default:
print("default")
}
}
}