var array: NSArray!
var dic :NSDictionary!
var nameStr: NSString!
//writeToFile：使数据持久化的一种操作方式
/*
存数据
1.找文件路径
2.使用writeToFile：把数据写入本地
读数据
1.找文件路径
2.使用数据形式所对应的对象来接收数据
*/
/* ******* 1.创建数组 ******* */
array = ["持","久","化"]
//2.找到沙盒里Document文件夹的路径
let documentPathArray = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)
//找Document文件夹的路径的元素
let documentPath = documentPathArray[0]
//找路径
let plistFilePath = documentPath.appending("/数据.plist")
print(plistFilePath)
// 4.存数据
/*
（1）part1写入的文件路径
（2）part2如果写yes 系统会自动创建临时路径去保存完成后 把数据移动到最终路径，防止文件写入错误问题
（3）no直接写入最终路径
*/
let isSuccess = array.write(toFile: plistFilePath, atomically: true)
isSuccess ? print("写入成功") :print("写入失败")
//5.读取数据
let array1 = NSArray(contentsOfFile: plistFilePath)
print(array1?.count)
print(array1)
/* ******* 2.写入字典 ******* */
//1.创建字典
dic = ["1":"游戏","2":"德玛"]
//2.找到沙盒里Document文件夹的路径(返回的是数组)
var documentsPathADic = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)
//找Document文件夹的路径的元素(返回的是字符串)
let documentsPathDic = documentsPathADic[0]
//找路径(返回的是字符串)
let plistDocumentsPathDic = documentsPathDic.appending("字典.plist")
//3.写入
let isDicIsSuccess = dic.write(toFile: plistDocumentsPathDic, atomically: true)
isDicIsSuccess ? print("字典写入成功") : print("字典写入失败")
//4.读出字典
let dic1 = NSDictionary(contentsOfFile: plistDocumentsPathDic)
for string in (dic1?.allValues)! {
print(string)
}
/* ******* 3.写入字符串 ******* */
nameStr = "鱼香肉丝"
//1.封装文件路径调用
let nameFilePath = self.filePath(filename: nameStr)
/*
(1)encoding 编码格式 NSUTF8StringEncoding 比较常用 万国编码
（2）error ：写入错误 一般写nil
（3）NSError *error；
*/
//2.写入字符串
try! nameStr.write(toFile: nameFilePath as String, atomically: true, encoding:String.Encoding.utf8.rawValue)
//isStrSuccess ? print("写入成功") : print("写入失败")
//3.读出字符串
let nameStr1 = try! String(contentsOfFile: nameFilePath, encoding: String.Encoding.utf8)
print("My ZiFuChuan is \(nameStr1)")
/* ******* 4.存NSData 二进制数据 ******* */
//创建字符串
let dataStr = "老干妈"
//字符串转换成二进制数据
let data = dataStr.data(using: String.Encoding.utf8) as! NSData
//封装文件路径
let dataFilePath = self.filePath(filename: "美味可口")
//写入data
let isDataSuccess = data.write(toFile: dataFilePath, atomically: true)
isDataSuccess ? print("二进制写入成功") : print("二进制写入失败")
//读出data
let readData = NSData.init(contentsOfFile: dataFilePath)
let strData = NSString.init(data: readData as! Data, encoding: String.Encoding.utf8.rawValue)
print("My data is \(strData)")
}
func filePath(filename:NSString) ->String {
let documentsPathArray = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)
let documentsPath = documentsPathArray[0]
let plistPath = documentsPath.appending(filename as String)
return plistPath
}
