IOS 系统常用功能

打开网页：

    @IBAction func haha(sender: AnyObject) {        UIApplication.sharedApplication().openURL(NSURL(string: "http://xxxxx.com")!)    }

打电话：

    @IBAction func dianhua(sender: AnyObject) {        UIApplication.sharedApplication().openURL(NSURL(string: "tel://10086")!)    }

发短信：

    @IBAction func duanxin(sender: AnyObject) {        UIApplication.sharedApplication().openURL(NSURL(string: "sms://10086")!)    }

发邮件：

    @IBAction func youjian(sender: AnyObject) {        UIApplication.sharedApplication().openURL(NSURL(string: "mailto://[e-mail]")!)    }