/*=======================================================
NSKeyedArchiver
========================================================*/
NSString *str = @"abc";
NSString *astr = @"efg";
NSArray *Array = [NSArray arrayWithObjects:str, astr, nil];
//Save
NSString *Path = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0]; NSString *filename = [Path stringByAppendingPathComponent:@"test"];
[NSKeyedArchiver archiveRootObject:Array toFile:filename];
str = @"a";
astr = @"";
//load
NSArray *arr = [NSKeyedUnarchiver unarchiveObjectWithFile: filename];
str = [arr objectAtIndex:0];
astr = [arr objectAtIndex:1];
NSLog(@"str:%@",str);
NSLog(@"astr:%@",astr);
/*=======================================================
NSUserDefaults
========================================================*/
NSString *str = @"abc";
NSString *astr = @"efg";
NSArray *Array = [NSArray arrayWithObjects:str, astr, nil];
//Save
NSUserDefaults *SaveDefaults = [NSUserDefaults standardUserDefaults];
[SaveDefaults setObject:Array forKey:@"SaveKey"];
str = @"a";
astr = @"";
//load
Array = [SaveDefaults objectForKey:@"SaveKey"];
str = [Array objectAtIndex:0];
astr = [Array objectAtIndex:1];
NSLog(@"str:%@",str);
NSLog(@"astr:%@",astr);
/*=======================================================
writeToFile:
========================================================*/
NSString *str = @"abc";
NSString *astr = @"efg";
NSArray *Array = [NSArray arrayWithObjects:str, astr, nil];
//Save
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
if (!documentsDirectory) {
NSLog(@"Documents directory not found!");
}
NSString *appFile = [documentsDirectory stringByAppendingPathComponent:@"Savedatas.plist"];
[[NSArray arrayWithObjects:Array,nil] writeToFile:appFile atomically:NO];
//load
if([[NSFileManager defaultManager] fileExistsAtPath:appFile])
self.SaveDataArray = [NSMutableArray arrayWithContentsOfFile:appFile];
else
self.SaveDataArray = [NSMutableArray arrayWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"Savedatas" ofType:@"plist"]];
NSArray *strArray = [self.SaveDataArray objectAtIndex:0];
str = [strArray objectAtIndex:0];
astr = [strArray objectAtIndex:1];
//坛子里的,搬过来。。。。。
-(BOOL) writeApplicationData:(NSDictionary *)data writeFileName:(NSString *)fileName
{
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
if (!documentsDirectory) {
NSLog(@"Documents directory not found!");
return NO;
}
NSString *appFile = [documentsDirectory stringByAppendingPathComponent:fileName];
return ([data writeToFile:appFile atomically:YES]);
}
-(id) readApplicationData:(NSString *)fileName
{
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *appFile = [documentsDirectory stringByAppendingPathComponent:fileName];
NSDictionary *myData = [[[NSDictionary alloc] initWithContentsOfFile:appFile] autorelease];
return myData;
}
[/lang]
之前说过的,还有一种保存数据的方法,没有发上来,
现在更新给大家。
用一个简单的例子来说明吧。
//
// SaveDataInf.m
// SaveDataUseChar
//
// Created by Lixf on 10-4-26.
// Copyright 2010 Lixf. All rights reserved.
//
#import "SaveDataInf.h"
@implementation SaveDataInf
@synthesize SaveData;
@synthesize FontSize, Color, Aligment;
-(id)initDataFromPath{
NSString *Path = [[[[NSBundle mainBundle] resourcePath] stringByDeletingLastPathComponent] stringByAppendingFormat:@"/Documents/"];
NSString *LastPath = [Path stringByAppendingFormat:@"Data.inf"];
if(SaveData != nil)
{
[SaveData release];
SaveData = nil;
}
SaveData = [[NSMutableData alloc] initWithContentsOfFile:LastPath];
unsigned char DataBuffer[10];
if(SaveData == nil)
{
SaveData = [[NSMutableData alloc] initWithLength:1000];
memset(DataBuffer, 0x0, sizeof(DataBuffer));
FontSize = 18;
Color = 0;
Aligment = 0;
DataBuffer[0] = FontSize;
DataBuffer[1] = Color;
DataBuffer[2] = Aligment;
[SaveData replaceBytesInRange:NSMakeRange(0, 10) withBytes:DataBuffer];
}else {
[SaveData getBytes:DataBuffer range:NSMakeRange(0, 10)];
FontSize = DataBuffer[0];
Color = DataBuffer[1];
Aligment = DataBuffer[2];
}
return self;
}
-(BOOL)writeDataToPath{
NSString *Path = [[[[NSBundle mainBundle] resourcePath] stringByDeletingLastPathComponent] stringByAppendingFormat:@"/Documents/"];
NSString *LastPath = [Path stringByAppendingFormat:@"Data.inf"];
BOOL isSuccess = [SaveData writeToFile:LastPath atomically:YES];
if(isSuccess == YES)
{
return YES;
}else {
return NO;
}
}
-(void)setFontSize:(char)size{
unsigned char DataBuffer[10];
FontSize = size;
DataBuffer[0] = size;
[SaveData replaceBytesInRange:NSMakeRange(0, 1) withBytes:DataBuffer];
}
-(void)setFontColor:(char)color{
unsigned char DataBuffer[10];
Color = color;
DataBuffer[0] = color;
[SaveData replaceBytesInRange:NSMakeRange(1, 1) withBytes:DataBuffer];
}
-(void)setFontAligment:(char)aligment{
unsigned char DataBuffer[10];
Aligment = aligment;
DataBuffer[0] = aligment;
[SaveData replaceBytesInRange:NSMakeRange(2, 1) withBytes:DataBuffer];
}
- (void)dealloc {
if(SaveData != nil)
{
[SaveData release];
SaveData = nil;
}
[super dealloc];
}
@end
注:忙里偷闲。。。我只写了使用的方法。。一些细微细节大家使用的时候要注意。。。
[ 此帖被angellixf在2010-05-19 08:55重新编辑 ]
源链接:http://www.cocoachina.com/bbs/read.php?tid-9414.html