我如何使用NSURL检索本地文件? [英] How can I retrieve local files with NSURL?
问题描述
我在这里有一个问题,可能有一个非常简单的答案,我忽略了...我如何检索NSURL的本地文件?我有这个:
$ b $ pre $ 重写func viewDidLoad(){
super.viewDidLoad()
var urlpath = NSBundle.mainBundle()。pathForResource(bpreg,ofType:xml)
let url:NSURL = NSURL(string:urlpath!)!
parser = NSXMLParser(contentsOfURL:url)!
parser.delegate = self
parser.parse()
}
<但成功构建后,它挂在var urlpath上。我四处搜寻,在这里和其他地方尝试了一些建议,无济于事。请帮忙? :(b / b)
要创建 NSURL
,您需要使用 fileURLWithPath: class method。
改变你的方法:
Swift 2
重写func viewDidLoad()
{
super.viewDidLoad()
var urlpath = NSBundle.mainBundle()。pathForResource(bpreg,ofType:xml)
let url :NSURL = NSURL.fileURLWithPath(urlpath!)!
parser = NSXMLParser(contentsOfURL:url)!
parser.delegate = self
parser.parse()
}
Swift 3
重写func viewDidLoad()
{
super.viewDidLoad()
let urlpath = Bundl e.main.path(forResource:bpreg,ofType:xml)
let url = NSURL.fileURL(withPath:urlpath!)
parser = XMLParser(contentsOf:url)!
parser.delegate = self
parser.parse()
}
< hr>
注意:在Swift 3中,您也可以使用 URL 类来构造url而不是 NSURL
class。所以上面的代码构建url更改为:
$ b $ pre $ let $ url $ URL $ file $ url $ url $ code>
I'm here with a question that probably has a really simple answer that I am overlooking... how can I retrieve local files with NSURL? I have this here:
override func viewDidLoad() {
super.viewDidLoad()
var urlpath = NSBundle.mainBundle().pathForResource("bpreg", ofType: "xml")
let url:NSURL = NSURL(string: urlpath!)!
parser = NSXMLParser(contentsOfURL: url)!
parser.delegate = self
parser.parse()
}
But after it successfully builds it hangs on var urlpath. I've searched around and tried a few suggestions here and other places to no avail. Please help? :(
You are trying to load a file from your file system, not from web.
For creating the NSURL
you need to use fileURLWithPath: class method.
Change your method like:
Swift 2
override func viewDidLoad()
{
super.viewDidLoad()
var urlpath = NSBundle.mainBundle().pathForResource("bpreg", ofType: "xml")
let url:NSURL = NSURL.fileURLWithPath(urlpath!)!
parser = NSXMLParser(contentsOfURL: url)!
parser.delegate = self
parser.parse()
}
Swift 3
override func viewDidLoad()
{
super.viewDidLoad()
let urlpath = Bundle.main.path(forResource: "bpreg", ofType: "xml")
let url = NSURL.fileURL(withPath: urlpath!)
parser = XMLParser(contentsOf: url)!
parser.delegate = self
parser.parse()
}
Note: In Swift 3 you can also use the URL class to construct the url instead of NSURL
class. So the above code for constructing url changes to:
let url = URL(fileURLWithPath: urlpath!)
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