iOS之了解沙盒

1、Xcode

      版本：7.2

      语言：Swift2

2、沙盒路径

      A、沙盒所在目录：

print("沙盒所在目录：\(NSHomeDirectory())");

     B、沙盒安装目录

print("沙盒安装目录: \(NSBundle.mainBundle().bundlePath)");

      观察运行结果。

沙盒所在目录：/Users/XXX/Library/Developer/CoreSimulator/Devices/3CA1FFF2-F868-4D3C-AA01-E4BEEEFBAC36/data/Containers/Data/Application/CAB24E30-8289-42B1-BD99-CC2E994E4540
沙盒安装目录: /Users/XXX/Library/Developer/CoreSimulator/Devices/3CA1FFF2-F868-4D3C-AA01-E4BEEEFBAC36/data/Containers/Bundle/Application/D58FD8F3-8223-4542-BEC6-CCA535D06011/沙盒.app

      激活Finder，进入上面输出的路径中，会看到下图所示的目录结构图：

    Documents: 用户自己生产的数据保存在该目录下，iTunes备份和恢复的时候，会包括此目录。

    Library：存储程序的默认设置，其他状态信息。

    tmp：提供创建临时文件。

3、沙盒的操作

   A、查询多沙盒的路径，源码如下：

import UIKit

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        /// 查询
        querySandBoxOperation();
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
    }
    
    /// 自己添加的函数
    func querySandBoxOperation()
    {
        /// 获取home路径
        let homePath = NSHomeDirectory();
        print("沙盒的Home路径是：\(homePath)\n");
        
        /// 输出document路径
        let documentPath:Array = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true) as Array<String>;
        print("沙盒的document路径为：\(documentPath[0])\n");
        
        /// 输出library路径
        let libPath = NSSearchPathForDirectoriesInDomains(.LibraryDirectory, .UserDomainMask, true);
        print("沙盒的library路径为：\(libPath[0])\n");
        
        /// 输出tmp路径
        let tmpPath = NSTemporaryDirectory();
        print("沙盒的tmp路径为：\(tmpPath)\n");
        
        /// 输出沙盒的缓存目录
        let cachePath = NSSearchPathForDirectoriesInDomains(.CachesDirectory, .UserDomainMask, true);
        print("沙盒的缓存目录为：\(cachePath[0])");
    }


}

     B、读写文

     document目录下，尝试读写文件，源码：

/// 写操作
    func writeFileOperation()
    {
        let path = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true) as Array<String>;
        
        let documentPath:String? = path[0];
        if nil != documentPath
        {
            /// 文件路径
            let filePath = documentPath! + "ios.txt";
            /// 文件内容
            let fileContents:NSArray = ["hello", "swift"];
            let result = fileContents.writeToFile(filePath, atomically: true);
            result == true ? print("写入成功"):print("写入失败");
        }
        else
        {
            print("目录不存在");
        }
    }
    
    
    /// 读操作
    func readFileOperatiob()
    {
        let path = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true) as Array<String>;
        let documentPath:String? = path[0];
        let readPath = documentPath! + "ios.txt";
        
        let fileContent = NSArray(contentsOfFile: readPath);
        print("文件内容如下:\n\(fileContent!)");
    }

   接着，调用写入和读写方法

    override func viewDidLoad() {
        super.viewDidLoad()
        /// 查询
        /// querySandBoxOperation();
        
        writeFileOperation();
        readFileOperatiob();
    }

    运行结果如下：