IOS的沙盒机制

//获取程序的安装目录
    NSString *home=NSHomeDirectory();
    NSLog(@"程序目录%@",home);
    
    //获取document目录
    //NSUserDomainMask从用户文件夹开始找 YES代表代表展开路径中的波浪字符“~”
    NSArray *documet=NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
	
    NSString *doc=documet[0];
    //用字符串拼接的方式获取document目录
    NSString *path=[home stringByAppendingString:@"Documents"];
    
    //获取cache目录
    NSArray *cache=NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES);
    
    NSLog(@"cache=%@",cache[0]);
    
    NSLog(@"%@",path);
    
    //获取temp目录
    NSString *temp=NSTemporaryDirectory();