Android から Swift へ ref: http://qiita.com/honkimi/items/c6288f7c1302626b4833

file0.txt

var intStr = "123" // "str"
var myInt:Int? = intStr.toInt() //nilが入ることもある

file1.txt

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
    var identifier = segue.identifier
    var destVc = (segue.destinationViewController as PresentedViewController)
    destVc.data = "some data from presented vc: \(identifier)"
}

file10.txt

    // returns the number of columns to display
    func numberOfComponentsInPickerView(pickerView: UIPickerView) -> Int {
        return 2
    }

    // returns the # of rows in each component.
    func pickerView(pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
        return 10
    }

    // returns the title of each row
    func pickerView(pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String! {
        return "(\(component),\(row))"
    }

    // on selected event
    func pickerView(pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
        println("\(self.mPickerView.selectedRowInComponent(0))")
        println("\(self.mPickerView.selectedRowInComponent(1))")
        println("\(component), \(row)")
    }

file11.txt

    func showWebPage(#url: String) {
        var req = NSURLRequest(URL: NSURL(string: url)!)
        self.mVewbView.loadRequest(req)
    }
    func showWebPage(#htmlString: String) {
        self.mVewbView.loadHTMLString(htmlString, baseURL: nil)
    }

file12.txt

class ... UIWebViewDelegate {
    func webView(webView: UIWebView, shouldStartLoadWithRequest request: NSURLRequest, navigationType: UIWebViewNavigationType) -> Bool {
        // do something, like re-direct or intercept etc.
        return true;
    }

    func webViewDidStartLoad(webView: UIWebView) {
        // do something, e.g., start UIActivityViewIndicator
        self.mActivityIndivator.startAnimating()
    }
    func webViewDidFinishLoad(webView: UIWebView) {
        self.mActivityIndivator.stopAnimating()
    }
    func webView(webView: UIWebView, didFailLoadWithError error: NSError) {
        self.mActivityIndivator.stopAnimating()
        var alert = UIAlertController(title: "error", message: error.localizedDescription, preferredStyle: UIAlertControllerStyle.Alert)
        alert.addAction(UIAlertAction(title: "Close", style: UIAlertActionStyle.Cancel, handler: nil))
        self.presentViewController(alert, animated: true, completion: nil)
    }
}

file13.txt

    let STORAGE_KEY = "key"
    let userDefaults = NSUserDefaults.standardUserDefaults()

    // UserDefault
    func saveUserdefault(data: AnyObject, forKey: String) {
        userDefaults.setObject(data, forKey: forKey)
        userDefaults.synchronize()
    }

    func retrieveUserdefault(key: String) -> String? {
        var obj = userDefaults.stringForKey(key)
        return obj
    }

    func deleteUserDefault(key: String) {
        self.userDefaults.removeObjectForKey(key)
    }

file2.txt

var data: String?
override func viewDidLoad() {
    if let tmp = data {
        println("received data: \(tmp)")
    }
}

file3.txt

import UIKit

class MasterTableViewController: UITableViewController {
    var items = ["item1", "item2", "item3"]

    // テーブル数のカウント. 初期化
    override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return self.items.count
    }

    // 各行のViewをセット
    override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
        var cell = tableView.dequeueReusableCellWithIdentifier("mycell") as UITableViewCell
        cell.textLabel.text = self.items[indexPath.row]
        return cell
    }

    // 各業をタップした際の挙動
    override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
        self.performSegueWithIdentifier("detail", sender: indexPath.row)
    }

    // Detail へ遷移するSegueの定義
    override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
        var destVC = segue.destinationViewController as UIViewController
        destVC.navigationItem.title = self.items[sender as Int]
    }

    // Bar Button Item 選択時のIBAction
    @IBAction func doAdd(sender: AnyObject) {
        self.items.append("item\(self.items.count + 1)")
        self.tableView.reloadData()
    }
}

file4.txt

    var alert = UIAlertController(title:"My title", message: "My message", preferredStyle: UIAlertControllerStyle.Alert)
    var actionCancel = UIAlertAction(title: "Cancel", style: UIAlertActionStyle.Cancel, handler: {action in
        // do nothing
    })
    var actionOk = UIAlertAction(title: "OK", style: UIAlertActionStyle.Default, handler: {action in
        println((alert.textFields![0] as UITextField).text)
    })
    alert.addAction(actionCancel)
    alert.addAction(actionOk)
    alert.addTextFieldWithConfigurationHandler({textField in
        textField.backgroundColor = UIColor.yellowColor()
        textField.placeholder = "enter text, i.e., Do Ra Me"
    })
    self.presentViewController(alert,animated: true, completion: nil)

file5.txt

    self.performSegueWithIdentifier("mypopover", sender: nil)

file6.txt

"app_name"="Hello iPhone";

file7.txt

NSLocalizedString("app_name", comment: "")

file8.txt

class ViewController: UIViewController, UITextFieldDelegate {
    func textFieldShouldReturn(textField: UITextField) -> Bool {
        textField.resignFirstResponder()
        return true
    }
}

file9.txt

    var actionSheet = UIAlertController(title: "Action (from bar button item)", message: "Choose an Action", preferredStyle: UIAlertControllerStyle.ActionSheet)
    var actionCancel = UIAlertAction(title: "Cancel", style: UIAlertActionStyle.Cancel, handler: {action in
        //nothing
    })
    var actionNormal1 = UIAlertAction(title: "Action 1", style: UIAlertActionStyle.Default, handler: {action in
        self.logText("actionNormal1")
    })
    var actionDestruct = UIAlertAction(title: "Destruct", style: UIAlertActionStyle.Destructive, handler: {action in
        self.logText("actionDestruct")
    })
    actionSheet.addAction(actionCancel)
    actionSheet.addAction(actionNormal1)
    actionSheet.addAction(actionDestruct)

    self.presentViewController(actionSheet, animated: true, completion: nil)