Data Serialization

[size=medium]
SQLine Demo：[url]http://www.wuleilei.com/blog/264[/url][/size]

NSKeyedUnarchiver[url]http://285746555.blog.51cto.com/2966432/647312[/url]
NSValue、CGPoint 序列化的问题等


[list][*]文件、属性列表
[*]对象归档
[*]SQLite
[*]Core Data
[/list]

[size=large]
NSUserDefaults
NSFileHandle
NSFileManager
NSUserDefaults
[/size]

	NSString * msg = [NSString stringWithFormat:@"%d : %@\n", i, [NSDate date]];
	NSString * path = 。。。;

	NSFileHandle *fh = [NSFileHandle fileHandleForWritingAtPath:path];
	[fh seekToEndOfFile];
	[fh writeData:[msg dataUsingEncoding:NSUTF8StringEncoding]];
	[fh closeFile];

[NSFileManager defaultManager]//单例
[[NSFileManager alloc]init] // 线程安全


[size=medium]
// NSFileManager的方法介绍
[url]http://apps.hi.baidu.com/share/detail/38263560[/url]
// 遍历文件、目录
[url]http://kevin-wu.net/tips-for-using-nsfilemanager-to-get-filefolder-list/[/url]
// 文件排序
[url]http://www.acwind.net/blog/?p=1116[/url][/size]


[size=large]NSUserDefaults
[url]http://www.cnblogs.com/zengwu/archive/2011/02/25/1964908.html[/url][/size]

NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
[defaults setObject:@"111" forKey:@"myTest"];
[defaults synchronize];//写入disk

NSString *testStr = [defaults objectForKey:@"myTest"];//再次读出
NSLog(@"testStr is: %@",testStr);


NSString * path = [[NSBundle mainBundle] pathForResource:@"default" ofType:@"json"];

[size=x-large]第8章枚举目录[/size]

#import 

int main (int argc, const char * argv[]) 
{
	//	可变的Array
	NSMutableArray *files = [NSMutableArray arrayWithCapacity:0];

	//	目录管理对象
	NSFileManager *manager = [NSFileManager defaultManager];

	//	~	用户主目录
	NSString *homeDir = [@"~" stringByExpandingTildeInPath];
	NSDirectoryEnumerator *dirEnum = [manager enumeratorAtPath:homeDir];


	//	枚举文件
	for (NSString *fileName; fileName = [dirEnum nextObject];)
	{
		if ([[fileName pathExtension] isEqualTo:@"jpg"]) 
		{	
			[files addObject:fileName];
		}
	}


	//	快速枚举
	for (NSString *fileName in files)
		NSLog(@"%@", fileName);	

	/*
	 //普通枚举
	NSEnumerator *fileEnum = [files objectEnumerator];
	while (fileName = [fileEnum nextObject]) {
		NSLog(@"%@", fileName);
	}
	*/

  return 0;
}

[size=x-large]第三章读文件[/size]

#import  

int main (int argc, const char * argv[]) 
{	
	NSLog(@"file path = %s",argv[1]);


	FILE *file = fopen(argv[1], "r"); 
	char buf[128] = {0}; 

	while (fgets(buf, 128, file)) 
	{ 
		buf[strlen(buf) - 1] = '\0'; 
		NSLog(@"length = %d,content = %s",strlen(buf), buf); 
	} 

	return 0; 
}