在展开Optional值时意外地发现了nil

Question

我在DECLARE id integer; r record; BEGIN<BR> INSERT INTO tabla1(campo1, campo2) VALUES(UPPER(d1),UPPER(d2));<BR> id = (SELECT LASTVAL());<BR> FOR r IN SELECT mi_campo FROM tabla2 LOOP<BR> INSERT INTO tabla3(campo1, campo2, campo3)<BR> VALUES(0, id, r.mi_campo);<BR> END LOOP;<BR> END;

中保存简单讯息

这是第一个视图控制器

    private void axWindowsMediaPlayer1_PlayStateChange(object sender, AxWMPLib._WMPOCXEvents_PlayStateChangeEvent e)
    {
        if ((WMPLib.WMPPlayState)e.newState == WMPLib.WMPPlayState.wmppsMediaEnded)
        {

            timer1.Interval = 100;
            timer1.Start();
            timer1.Enabled = true;   
            timer1.Tick += timer1_Tick;
        }
    }

    private void timer1_Tick(object sender, EventArgs e)
    {
        /// method to play video list items
        myFuntiontoPlayVideo();
        timer1.Enabled = false;
    }     

这是第二个视图控制器

NSMutableArray

Answer 1

<?php require('checker.php'); $result = checker::isExpired($_COOKIE["hash"]); $_COOKIE["usr"] = $result; if ($result != false) { echo '<span style"color:red;">szeretlek java</span>'; echo '<script src="js/jquery.js">'; echo 'var result = $.cookie("usr");'; echo 'var added = "Hello, " + result;'; echo '$(function { $("#brand_div").html("alma"); });'; echo '</script>'; } else { echo ""; } ?> 和save函数中几乎没有问题。您需要检查用户默认值中是否存在已保存的数组。您可以尝试以下代码：

第一个视图控制器：

viewWillAppear

第二个视图控制器：

@IBAction func save(sender: AnyObject) {
    let alert = UIAlertController(title: nil, message: "Please enter message.", preferredStyle: UIAlertControllerStyle.Alert)
    if NewSmu.text?.isEmpty == false {
        var templates = NSMutableArray()
        let uDefault = NSUserDefaults.standardUserDefaults()
        if let savedArray = uDefault.arrayForKey("TEMPLATES") {
            templates = NSMutableArray(array: savedArray)
        }
        if !templates.containsObject(NewSmu.text) {
            templates.addObject(NewSmu.text)
            uDefault.setObject(templates, forKey: "TEMPLATES")
        }
        alert.title = "Success"
        alert.message = "Template saved."
    }
    alert.addAction(UIAlertAction(title: "OK", style: .Default, handler: nil))
    presentViewController(alert, animated: true, completion: nil)
}