［转］保存数据的一系列方法

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?http://cocoachina.com/bbs/read.php?tid-9414-fpage-0-toread--page-1.html/*=======================================================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?=?[?PathstringByAppendingPathComponent?:?@"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?:?[?[?NSBundlemainBundle?]?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;}?