Swift解析html表 [英] Swift parse html table
本文介绍了Swift解析html表的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我正在尝试将此信息从网页转移到iOS应用中。
I am trying to bring this info from a web page into an iOS app.
HTML代码:
<table border="0" cellpadding="3" cellspacing="0" width="85%"><tr><td width="100%" colspan="3" bgcolor="#C9C9E7"><b>Update as of 3:57:00 PM (CDT) Thu., Apr. 16, 2015</b><br></td></tr><tr>
<td width="50%" bgcolor="#FFFFFF">Production Line 1</td>
<td width="35%" bgcolor="#FFFFFF">9:00 minutes (10 min) </td>
<td width="15%" bgcolor="#FFFFFF">No delay</td>
</tr><tr>
<td width="50%" bgcolor="#FFFFFF"><b>Production Line 2</b></td>
<td width="35%" bgcolor="#FFFFFF"><b>7:57 minutes </b><b>(4 min) </b></td>
<td width="15%" bgcolor="#FFFFFF"><b>+3:57</b></td>
</tr><tr>
<td width="50%" bgcolor="#FFFFFF"><b>Production Line 3</b></td>
<td width="35%" bgcolor="#FFFFFF"><b>10:35 minutes </b><b>(8 min) </b></td>
<td width="15%" bgcolor="#FFFFFF"><b>+2:35</b></td>
</tr></table>
这是我目前对代码的尝试。我已经标记了我认为是//问题的问题。我只获得可选的nil值。我正在使用 Swift-HTML-Parser 来帮助实现这一目标。我只进行了一次更改,那就是为表添加一个部分。
This is my current attempt at the code. I have marked the line that I think is the issue with // issue. I get just optional nil values. I am using Swift-HTML-Parser to help make this happen. I made only one change and that was to add a section for table.
import UIKit
extension String {
var html2String:String {
return NSAttributedString(data: dataUsingEncoding(NSUTF8StringEncoding)!, options: [NSDocumentTypeDocumentAttribute:NSHTMLTextDocumentType,NSCharacterEncodingDocumentAttribute:NSUTF8StringEncoding], documentAttributes: nil, error: nil)!.string
}
}
class mainViewController: UIViewController {
@IBOutlet var textView: UITextView!
override func viewDidLoad() {
super.viewDidLoad()
updateTrafficInfo()
let singleFingerTap = UITapGestureRecognizer(target: self, action: "handleSingleTap:")
self.textView.addGestureRecognizer(singleFingerTap)
}
// MARK: gestutre recognizer
func handleSingleTap(recognizer: UITapGestureRecognizer) {
updateTrafficInfo()
}
func updateTrafficInfo(){
var request = HTTPTask()
var err: NSError?
request.GET("http://localhost/productiontimes.html", parameters: nil, success: {(response: HTTPResponse) in
if let data = response.responseObject as? NSData {
let rawHTML = NSString(data: data, encoding: NSUTF8StringEncoding) as! String
let option = CInt(HTML_PARSE_NOERROR.value | HTML_PARSE_RECOVER.value)
var parser = HTMLParser(html: rawHTML, encoding: NSUTF8StringEncoding, option: option, error: &err)
if err != nil {
println(err)
}
var bodyNode = parser.table
if let inputNodes = bodyNode?.xpath("//tr") {
for node in inputNodes {
dispatch_sync(dispatch_get_main_queue(), {
self.textView.text = node.xpath("//td")?[0].contents //issue
println(node.xpath("//td")?[0].contents)
});
}
}
dispatch_sync(dispatch_get_main_queue(), {
self.textView.text = rawHTML.html2String
});
}
},failure: {(error: NSError, response: HTTPResponse?) in
println("error: \(error)")
})
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
目标是输出的格式是这样的。
Goal would be to have the output in a format of something like this.
Production Line - Time - Delay
Production Line 1 - 9:00 minutes (10 min) - No delay
Production Line 2 - 7:57 minutes (4 min) - +3:57
推荐答案
编辑/更新:Swift 4.x
edit/update: Swift 4.x
extension Data {
var html2AttributedString: NSAttributedString? {
return try? NSAttributedString(data: self, options: [.documentType: NSAttributedString.DocumentType.html, .characterEncoding: String.Encoding.utf8.rawValue], documentAttributes: nil)
}
var html2String: String {
return html2AttributedString?.string ?? ""
}
}
let data = Data("""
<table border="0" cellpadding="3" cellspacing="0" width="85%"><tr><td width="100%" colspan="3" bgcolor="#C9C9E7"><b>Update as of 3:57:00 PM (CDT) Thu., Apr. 16, 2015</b><br></td></tr><tr>
<td width="50%" bgcolor="#FFFFFF">Production Line 1</td>
<td width="35%" bgcolor="#FFFFFF">9:00 minutes (10 min) </td>
<td width="15%" bgcolor="#FFFFFF">No delay</td>
</tr><tr>
<td width="50%" bgcolor="#FFFFFF"><b>Production Line 2</b></td>
<td width="35%" bgcolor="#FFFFFF"><b>7:57 minutes </b><b>(4 min) </b></td>
<td width="15%" bgcolor="#FFFFFF"><b>+3:57</b></td>
</tr><tr>
<td width="50%" bgcolor="#FFFFFF"><b>Production Line 3</b></td>
<td width="35%" bgcolor="#FFFFFF"><b>10:35 minutes </b><b>(8 min) </b></td>
<td width="15%" bgcolor="#FFFFFF"><b>+2:35</b></td>
</tr></table><table border="0" cellpadding="3" cellspacing="0" width="85%"><tr><td width="100%" colspan="3" bgcolor="#C9C9E7"><b>Update as of 3:57:00 PM (CDT) Thu., Apr. 16, 2015</b><br></td></tr><tr>
<td width="50%" bgcolor="#FFFFFF">Production Line 1</td>
<td width="35%" bgcolor="#FFFFFF">9:00 minutes (10 min) </td>
<td width="15%" bgcolor="#FFFFFF">No delay</td>
</tr><tr>
<td width="50%" bgcolor="#FFFFFF"><b>Production Line 2</b></td>
<td width="35%" bgcolor="#FFFFFF"><b>7:57 minutes </b><b>(4 min) </b></td>
<td width="15%" bgcolor="#FFFFFF"><b>+3:57</b></td>
</tr><tr>
<td width="50%" bgcolor="#FFFFFF"><b>Production Line 3</b></td>
<td width="35%" bgcolor="#FFFFFF"><b>10:35 minutes </b><b>(8 min) </b></td>
<td width="15%" bgcolor="#FFFFFF"><b>+2:35</b></td>
</tr></table>
""".utf8)
let output = data.html2String
let components = output.components(separatedBy: .newlines)
for index in stride(from: 1, to: 9, by: 3) {
let line = components[index]
let time = components[index+1]
let delay = components[index+2]
print( line + " - " + time + " - " + delay )
}
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