iOS 应用程序沙盒的应用

来源：互联网发布：域名注册查询工具编辑：程序博客网时间：2024/05/17 23:41

向文件中写入东西 ios中的程序都是储存在沙盒之中的，向文件中写入文件，就是先提取路径再创建数据随后再输入

代码如下

import UIKitclass ViewController: UIViewController {    override func viewDidLoad() {        var url = NSURL()        super.viewDidLoad()        // Do any additional setup after loading the view, typically from a nib.                //读出文件的相关操作        //声明搜寻的路径 从主路径中寻去 可扩展的去寻找        var sp = NSSearchPathForDirectoriesInDomains(NSSearchPathDirectory.DocumentDirectory, NSSearchPathDomainMask.AllDomainsMask,true)   //如果搜索到的话        if sp.count > 0 {            //声明读入的路径            var url = NSURL(fileURLWithPath: "\(sp[0])/data.txt")            //输出路径            print(url)                var data = NSMutableData()        //添加数据            data.appendData("Hello Swift\n".dataUsingEncoding(NSUTF8StringEncoding, allowLossyConversion: true)!)        //写入文件        data.writeToFile(url.path!, atomically: true)        print("end")        }        }

随后就会输出url的路径终端用spotlight 搜索 terminal

data.txt不用考虑随后打开终端，复制文件名随后会看到data.txt，就会看到hello swift

e:///Users/hznucai/Library/Developer/CoreSimulator/Devices/F3C4A8B5-E455-4603-BD0B-D8D42F15C497/data/Containers/Data/Application/8896B098-8187-4B1C-9FEF-93B371F5E2BF/Dor/CoreSimulator/Devices/F3C4A8B5-E455-4603-BD0B-D8D42F15C497/data/Containers/Data/Application/8896B098-8187-4B1C-9FEF-93B371F5E2BF/Documents/data.txt

file:///Users/hznucai/Library/Developer/CoreSimulator/Devices/F3C4A8B5-E455-4603-BD0B-D8D42F15C497/data/Containers/Data/Application/8896B098-8187-4B1C-9FEF-93B371F5E2BF/Documents/data.txt

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