①有時(shí)候進(jìn)行少量數(shù)據(jù)持久化存儲(chǔ)時(shí)候，可使用屬性列表 Plist 文件。

②如項(xiàng)目中要使用比較多的配置數(shù)據(jù)，可生成 Plist 后再轉(zhuǎn)移到項(xiàng)目中

下面例子簡(jiǎn)單實(shí)現(xiàn)對(duì)于在沙盤下的 Plist 文件進(jìn)行增刪查改操作。

保存

更改

刪除

import UIKit

class ViewController: UIViewController {
    
    @IBOutlet weak var userNumber: UITextField!
    @IBOutlet weak var userName: UITextField!
    @IBOutlet weak var userAge: UITextField!
    
    var filePath = "" //文件路徑
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        self.createPlistFile()
    }
    
    //判斷是否存在該plist文件，不存在則創(chuàng)建
    func createPlistFile() {
        //獲取路徑
        let path = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)[0]
        filePath = path.stringByAppendingString("/data666.plist")
        //###注意加橫桿“/”，否則真機(jī)測(cè)試崩潰，因?yàn)闊o法寫入####
        
        if !NSFileManager.defaultManager().fileExistsAtPath(filePath) {
            let rootDic = NSMutableDictionary()
            rootDic.writeToFile(filePath, atomically: true)
        }
    }
    
    //遍歷數(shù)據(jù)
    func findPlistFileData() -> Bool {
        
        if let dicData = NSMutableDictionary(contentsOfFile: filePath) {
            for (k,_) in dicData {
                // 判斷是否存在相同的學(xué)號(hào)
                if userNumber.text! == (k as! String) {
                    return true
                }
            }
        }
        return false
    }
    
    //保存數(shù)據(jù)
    func savePlistData() {
        
        let rootDic = NSMutableDictionary(contentsOfFile: filePath) //根
        let userDataDic = NSMutableDictionary()  //二級(jí)
        userDataDic.setObject(userAge.text!, forKey: "age")
        userDataDic.setObject(userName.text!, forKey: "name")
        rootDic!.setObject(userDataDic, forKey: userNumber.text!)
        rootDic!.writeToFile(filePath, atomically: true)
        print("保存成功")
    }
    
    //刪除數(shù)據(jù)
    func deletePlistData() {

        let rootDic = NSMutableDictionary(contentsOfFile: filePath) //根
        rootDic!.removeObjectForKey(userNumber.text!) //二級(jí)
        rootDic!.writeToFile(filePath, atomically: true)
        print("刪除成功")
    }
    
    // MARK: - Action
    // 保存按鈕
    @IBAction func saveData(sender: UIButton) {
        //門衛(wèi) 檢查
        guard findPlistFileData() == false else {
            let alert = UIAlertController(title: "學(xué)號(hào)已存在", message: "是否要覆蓋當(dāng)前學(xué)號(hào)所有內(nèi)容", preferredStyle: .Alert)
            alert.addAction(UIAlertAction(title: "是的", style: .Default, handler: { (action) -> Void in
                
                self.savePlistData() //保存數(shù)據(jù)
            }))
            alert.addAction(UIAlertAction(title: "否", style: .Cancel, handler: nil))
            self.presentViewController(alert, animated: true, completion: nil)
            return
        }
        
        self.savePlistData() //保存數(shù)據(jù)
        let alert = UIAlertController(title: "保存成功", message: "", preferredStyle: .Alert)
        alert.addAction(UIAlertAction(title: "OK", style: .Default, handler: nil))
        self.presentViewController(alert, animated: true, completion: nil)
    }
    
    
    // 刪除按鈕
    @IBAction func deleteData(sender: UIButton) {
        //門衛(wèi) 檢查
        guard findPlistFileData() == true else {
            let alert = UIAlertController(title: "學(xué)號(hào)不存在", message: "請(qǐng)查看是否輸入有誤", preferredStyle: .Alert)
            alert.addAction(UIAlertAction(title: "確定", style: .Cancel, handler: nil))
            self.presentViewController(alert, animated: true, completion: nil)
            return
        }
        let alert = UIAlertController(title: "刪除成功", message: "", preferredStyle: .Alert)
        alert.addAction(UIAlertAction(title: "確定", style: .Cancel, handler: nil))
        self.presentViewController(alert, animated: true, completion: nil)
        self.deletePlistData() //刪除數(shù)據(jù)
    }
    
    // 查找按鈕
    @IBAction func findData(sender: UIButton) {
        guard findPlistFileData() == true else {
            print("該學(xué)號(hào)不存在")
            return
        }
        if let dicData = NSMutableDictionary(contentsOfFile: filePath) {
            for (k,v) in dicData {
                if userNumber.text! == (k as! String) {
                    let dic2 = v as! NSDictionary
                    print("該學(xué)號(hào)已存在")
                    for (k1, v2) in dic2 {
                        print("\(k1): \(v2)")
                    }
                }
            }
        }
    }
}