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有誰知道我該如何解決這個問題?無法獲得變數
問題是prepareForSegue
函數沒有得到chanceRain
變量。由於某種原因chanceRain
只在任務變量內有一個值。有人知道如何解決這個問題嗎?我試圖修復它在操場上,但我不能在其中導入SWXMLHash。
import UIKit
import SWXMLHash
class ViewController: UIViewController, UITableViewDelegate {
var cellContent = [""]
var indexOfTime = 0
var chanceRain = ""
var defaults = NSUserDefaults(suiteName: "group.com.royvano.paraplu")
var rainInt :Int = 0
@IBOutlet var cityInput: UITextField!
func enumerate(indexer: XMLIndexer) {
for child in indexer.children {
NSLog(child.element!.name)
enumerate(child)
}
}
@IBAction func button(sender: AnyObject) {
var url = NSURL(string: "http://api.worldweatheronline.com/free/v2/weather.ashx?key=ca89103dfe0a8b844a0a1e1249820&q=" +
cityInput.text.stringByReplacingOccurrencesOfString(" ", withString: "-") + "/" + cityInput.text.stringByReplacingOccurrencesOfString(" ", withString: "-") + "/" + "&num_of_days=2&tp=3&format=xml")
let task = NSURLSession.sharedSession().dataTaskWithURL(url!, completionHandler: { (data, response, error) -> Void in
var urlContent = NSString(data: data, encoding: NSUTF8StringEncoding)
println(url)
var xml = SWXMLHash.parse(urlContent!)
for elem in xml["data"]["weather"][0]["hourly"][self.indexOfTime]{
self.chanceRain = (elem["chanceofrain"].element!.text!)
self.defaults?.setObject(self.chanceRain, forKey: "rainPercentage")
self.defaults?.synchronize()
self.performSegueWithIdentifier("btnSubmitSegue", sender: self)
}
println(self.chanceRain)
})
task.resume()
}
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
if(segue.identifier == "btnSubmitSegue"){
var svc: viewTwo = segue.destinationViewController as viewTwo
svc.datapassed = "There is " + self.chanceRain + "% chance of rain" //dit werkt, maar chanceRain niet..?
} }
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
cellContent = ["01:00","04:00","07:00", "10:00", "13:00", "16:00", "19:00", "22:00"]
}
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return cellContent.count
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = UITableViewCell(style: UITableViewCellStyle.Default , reuseIdentifier: "Cell")
cell.textLabel?.text = "\(cellContent[indexPath.row])"
return cell }
func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath){
indexOfTime = indexPath.row
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
另外,viewTwo類看過來:
import Foundation
import UIKit
class viewTwo: UIViewController {
@IBOutlet var label: UILabel!
var datapassed:String! = ""
override func viewDidLoad() {
label.text = datapassed }
}
你能解決你的代碼格式嗎?目前很難閱讀 – Undo 2015-04-04 18:11:12
@undo就這樣做了! – royvano 2015-04-04 18:18:09
@royvano如果這就是你所說的格式正確,那麼我建議你開始把一些工作代碼示例(不是這一個......這一個不按預期工作),以[codereview.se] ...因爲那麼遠從格式化... – nhgrif 2015-04-04 18:56:44