参考：http://blog.csdn.net/xyz_lmn/article/details/8968213 感谢这些先行者
文件操作常用操作记录一下：
//获取沙盒的根路径
NSString *dirHome = NSHomeDirectory();
NSLog(@"%@",dirHome);
//获取Documents目录路径
NSArray *path = NSSearchPathForDirectoriesInDomains(NSDocumentationDirectory,NSUserDomainMask, YES);
NSString *documentsDirectory = [path objectAtIndex:0];
NSLog(@"%@",documentsDirectory);
//获取Library 目录路径
path = NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES);
NSString *libraryDirectory = [path objectAtIndex:0];
NSLog(@"%@",libraryDirectory);
//获取caches目录路径
path = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES);
NSString *caches = [path objectAtIndex:0];
NSLog(@"%@",caches);
//获取Tmp 目录路径
NSString *tmpDirectory = NSTemporaryDirectory();
NSLog(@"%@",tmpDirectory);
//创建文件夹
//1 获得文件路径
//2 创建文件管理器
//3 用文件管理器在目录上创建文件
path = NSSearchPathForDirectoriesInDomains(NSDocumentationDirectory,NSUserDomainMask, YES);
documentsDirectory = [path objectAtIndex:0];
documentsDirectory = [documentsDirectory stringByAppendingPathComponent:@"test"];
NSFileManager *fm = [NSFileManager defaultManager];
BOOL res = [fm createDirectoryAtPath:documentsDirectory withIntermediateDirectories:YES attributes:nil error:nil];
if(!res)
{
NSLog(@"文件夹创建成功");
}
else
{
NSLog(@"文件夹创建失败");
}
//创建文件（与文件夹的创建相同）
path = NSSearchPathForDirectoriesInDomains(NSDocumentationDirectory, NSUserDomainMask, YES);
documentsDirectory = [path objectAtIndex:0];
documentsDirectory = [documentsDirectory stringByAppendingPathComponent:@"text"];
documentsDirectory = [documentsDirectory stringByAppendingPathComponent:@"123.txt"];
fm = [NSFileManager defaultManager];
res = [fm createDirectoryAtPath:documentsDirectory withIntermediateDirectories:YES attributes:nil error:nil];
if(res)
{
NSLog(@"文件夹创建成功");
}
else
{
NSLog(@"文件夹创建失败");
}
//写数据到文件
path = NSSearchPathForDirectoriesInDomains(NSDocumentationDirectory, NSUserDomainMask, YES);
documentsDirectory = [path objectAtIndex:0];
documentsDirectory = [documentsDirectory stringByAppendingPathComponent:@"text"];
documentsDirectory = [documentsDirectory stringByAppendingPathComponent:@"123.txt"];
NSString *content = @"文件写入的内容";
res = [content writeToFile:documentsDirectory atomically:YES encoding:NSUTF8StringEncoding error:nil];
if(res)
{
NSLog(@"文件夹创建成功");
}
else
{
NSLog(@"文件夹创建失败");
}
//读文件数据
path = NSSearchPathForDirectoriesInDomains(NSDocumentationDirectory, NSUserDomainMask, YES);
documentsDirectory = [path objectAtIndex:0];
documentsDirectory = [documentsDirectory stringByAppendingPathComponent:@"text"];
documentsDirectory = [documentsDirectory stringByAppendingPathComponent:@"123.txt"];
content = [NSString stringWithContentsOfFile:documentsDirectory encoding:NSUTF8StringEncoding error:nil];
NSLog(@"文件读取成功：%@",content);
//文件的属性
path = NSSearchPathForDirectoriesInDomains(NSDocumentationDirectory, NSUserDomainMask, YES);
documentsDirectory = [path objectAtIndex:0];
documentsDirectory = [documentsDirectory stringByAppendingPathComponent:@"text"];
documentsDirectory = [documentsDirectory stringByAppendingPathComponent:@"123.txt"];
fm = [NSFileManager defaultManager];
NSDictionary *fileAttributes = [fm attributesOfItemAtPath:documentsDirectory error:nil];
NSArray *keys;
id key,value;
keys = [fileAttributes allKeys];
int count = [keys count];
for (int i= 0; i<count; i++)
{
key = [keys objectAtIndex:i];
value = [fileAttributes objectForKey:key];
NSLog(@"Key:%@ for value :%@",key,value);
}
//删除文件
path = NSSearchPathForDirectoriesInDomains(NSDocumentationDirectory, NSUserDomainMask, YES);
documentsDirectory = [path objectAtIndex:0];
documentsDirectory = [documentsDirectory stringByAppendingPathComponent:@"text"];
documentsDirectory = [documentsDirectory stringByAppendingPathComponent:@"123.txt"];
fm = [NSFileManager defaultManager];
res=[fm removeItemAtPath:documentsDirectory error:nil];
if(res)
{
NSLog(@"文件删除成功");
}
{
NSLog(@"文件删除失败");
}