iOS 各种系统文件目录 临时，缓存，document,lib,归档，序列化
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iOS 各种系统文件目录 临时，缓存，document,lib,归档，序列化
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Java代碼 ? /**? ????1:Documents：應用中用戶數據可以放在這里，iTunes備份和恢復的時候會包括此目錄? ????2:tmp：存放臨時文件，iTunes不會備份和恢復此目錄，此目錄下文件可能會在應用退出后刪除? ????3:Library/Caches：存放緩存文件，iTunes不會備份此目錄，此目錄下文件不會在應用退出刪除? ?????*/?? ????NSArray?*paths1=NSSearchPathForDirectoriesInDomains(NSDocumentDirectory?? ???????????????????????????????????????????????????????,?NSUserDomainMask?? ???????????????????????????????????????????????????????,?YES);?? ?????? ?????? ????NSString?*documentsDirect=[paths1?objectAtIndex:0];?? ????assert(1?==?paths1.count);?? ????NSLog(@">>documentsDirect=%@",documentsDirect);?? ??? ????NSArray?*Librarypaths?=??NSSearchPathForDirectoriesInDomains(NSDocumentationDirectory,?NSDocumentDirectory,?YES);?? ????NSString*?libraryDirectory??=?[Librarypaths?objectAtIndex:0];?? ????NSLog(@">>Librarypaths.length?=%d",[Librarypaths?count]);?? ?????assert(1?<?Librarypaths.count);?? ??????? ????NSLog(@"libraryDirectory=%@",libraryDirectory);?? ?????? ????//如果要指定其他文件目錄，比如Caches目錄，需要更換目錄工廠常量，上面代碼其他的可不變?? ????NSArray?*pathcaches=NSSearchPathForDirectoriesInDomains(NSCachesDirectory?? ???????????????????????????????????????????????????????,?NSUserDomainMask?? ???????????????????????????????????????????????????????,?YES);?? ????NSString*?cacheDirectory??=?[pathcaches?objectAtIndex:0];?? ????NSLog(@"cacheDirectory=%@",cacheDirectory);?? ????/**? ?????使用NSSearchPathForDirectoriesInDomains只能定位Caches目錄和Documents目錄。? ?????? ?????tmp目錄，不能按照上面的做法獲得目錄了，有個函數可以獲得應用的根目錄? ?????*/?? ????NSString?*tempDir1=NSHomeDirectory()?;?? ????NSString?*tempDir2=NSTemporaryDirectory();?? ????NSLog(@"tempDir1=%@",tempDir1);?? ????NSLog(@"tempDir2=%@",tempDir2);?? /**1:Documents：應用中用戶數據可以放在這里，iTunes備份和恢復的時候會包括此目錄2:tmp：存放臨時文件，iTunes不會備份和恢復此目錄，此目錄下文件可能會在應用退出后刪除3:Library/Caches：存放緩存文件，iTunes不會備份此目錄，此目錄下文件不會在應用退出刪除*/NSArray *paths1=NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);NSString *documentsDirect=[paths1 objectAtIndex:0];assert(1 == paths1.count);NSLog(@">>documentsDirect=%@",documentsDirect);NSArray *Librarypaths = NSSearchPathForDirectoriesInDomains(NSDocumentationDirectory, NSDocumentDirectory, YES);NSString* libraryDirectory = [Librarypaths objectAtIndex:0];NSLog(@">>Librarypaths.length =%d",[Librarypaths count]);assert(1 < Librarypaths.count);NSLog(@"libraryDirectory=%@",libraryDirectory);//如果要指定其他文件目錄，比如Caches目錄，需要更換目錄工廠常量，上面代碼其他的可不變NSArray *pathcaches=NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES);NSString* cacheDirectory = [pathcaches objectAtIndex:0];NSLog(@"cacheDirectory=%@",cacheDirectory);/**使用NSSearchPathForDirectoriesInDomains只能定位Caches目錄和Documents目錄。tmp目錄，不能按照上面的做法獲得目錄了，有個函數可以獲得應用的根目錄*/NSString *tempDir1=NSHomeDirectory() ;NSString *tempDir2=NSTemporaryDirectory();NSLog(@"tempDir1=%@",tempDir1);NSLog(@"tempDir2=%@",tempDir2); #import?<Foundation/Foundation.h>?? ?? @interface?Address?:?NSObject<NSCoding>?? {?? ????NSString?*country;?? ????NSString?*city;?? }?? @property(nonatomic,copy)?NSString?*country;?? @property(nonatomic,copy)?NSString?*city;??? @end?? #import <Foundation/Foundation.h>@interface Address : NSObject<NSCoding>
{NSString *country;NSString *city;
}
@property(nonatomic,copy) NSString *country;
@property(nonatomic,copy) NSString *city;
@end #import?"Address.h"?? ?? @implementation?Address?? @synthesize?country;?? @synthesize?city;?? -?(void)encodeWithCoder:(NSCoder?*)aCoder{?? ????[aCoder?encodeObject:country?forKey:@"country"];?? ????[aCoder?encodeObject:city?forKey:@"city"];?? }?? -?(id)initWithCoder:(NSCoder?*)aDecoder{?? ????if?(self?=?[super?init])?{?? ????????[self?setCountry:[aDecoder?decodeObjectForKey:@"country"]];?? ????????[self?setCity:[aDecoder?decodeObjectForKey:@"city"]];?? ????}?return?self;?? }?? @end?? #import "Address.h"@implementation Address
@synthesize country;
@synthesize city;
- (void)encodeWithCoder:(NSCoder *)aCoder{[aCoder encodeObject:country forKey:@"country"];[aCoder encodeObject:city forKey:@"city"];
}
- (id)initWithCoder:(NSCoder *)aDecoder{if (self = [super init]) {[self setCountry:[aDecoder decodeObjectForKey:@"country"]];[self setCity:[aDecoder decodeObjectForKey:@"city"]];} return self;
}
@end #import?<Foundation/Foundation.h>?? #import?"Address.h"?? @interface?User?:?NSObject<NSCoding>{?? ????NSString?*_name;?? ????NSString?*_password;?? ????Address?*_address;?? }?? @property(nonatomic,copy)?NSString?*name;?? @property(nonatomic,copy)?NSString?*password;?? @property(nonatomic,retain)?Address?*address;?? ?? @end?? #import <Foundation/Foundation.h>
#import "Address.h"
@interface User : NSObject<NSCoding>{NSString *_name;NSString *_password;Address *_address;
}
@property(nonatomic,copy) NSString *name;
@property(nonatomic,copy) NSString *password;
@property(nonatomic,retain) Address *address;@end #import?"User.h"?? ?? ?? @implementation?User?? @synthesize?name?=?_name;?? @synthesize?password?=?_password;?? @synthesize?address?=?_address;?? ?? -?(void)encodeWithCoder:(NSCoder?*)aCoder{?? ????[aCoder?encodeObject:_name?forKey:@"name"];?? ????[aCoder?encodeObject:_password?forKey:@"password"];?? ????[aCoder?encodeObject:_address?forKey:@"address"];?? }?? -?(id)initWithCoder:(NSCoder?*)aDecoder{?? ????if?(self?=?[super?init])?{?? ????????[self?setName:[aDecoder?decodeObjectForKey:@"name"]];?? ????????[self?setPassword:[aDecoder?decodeObjectForKey:@"password"]];?? ????????[self?setAddress:[aDecoder?decodeObjectForKey:@"address"]];?? ????}?? ????return?self;?? }?? ?? @end?? #import "User.h"@implementation User
@synthesize name = _name;
@synthesize password = _password;
@synthesize address = _address;- (void)encodeWithCoder:(NSCoder *)aCoder{[aCoder encodeObject:_name forKey:@"name"];[aCoder encodeObject:_password forKey:@"password"];[aCoder encodeObject:_address forKey:@"address"];
}
- (id)initWithCoder:(NSCoder *)aDecoder{if (self = [super init]) {[self setName:[aDecoder decodeObjectForKey:@"name"]];[self setPassword:[aDecoder decodeObjectForKey:@"password"]];[self setAddress:[aDecoder decodeObjectForKey:@"address"]];}return self;
}@end NSString?*tempDir2=NSTemporaryDirectory();?????? ????? ????? //?Do?any?additional?setup?after?loading?the?view,?typically?from?a?nib.?? ???Address?*myAddress?=?[[Address?alloc]?init]?;?? ???myAddress.country?=?@"中國";?? ???myAddress.city?=?@"杭州";?? ???User?*user?=?[[User?alloc]?init]?;?? ????? ???user.name?=?@"盧克";?? ???user.password?=?@"lukejin";?? ???user.address?=?myAddress;?? ???//歸檔??保存的是plist的二進制數據格式?? ???NSString?*path?=?[tempDir2?stringByAppendingPathComponent:@"user"];?? ???[NSKeyedArchiver?archiveRootObject:user?toFile:path];?? ????? ????? ???//從文檔中讀取?? ???User?*object?=?[NSKeyedUnarchiver?unarchiveObjectWithFile:path];?? ???NSLog(@"object.name?:?%@",object.name);?? NSString *tempDir2=NSTemporaryDirectory(); // Do any additional setup after loading the view, typically from a nib.Address *myAddress = [[Address alloc] init] ;myAddress.country = @"中國";myAddress.city = @"杭州";User *user = [[User alloc] init] ;user.name = @"盧克";user.password = @"lukejin";user.address = myAddress;//歸檔 保存的是plist的二進制數據格式NSString *path = [tempDir2 stringByAppendingPathComponent:@"user"];[NSKeyedArchiver archiveRootObject:user toFile:path];//從文檔中讀取User *object = [NSKeyedUnarchiver unarchiveObjectWithFile:path];NSLog(@"object.name : %@",object.name); NSMutableDictionary?*dataDictionary?=?[[NSMutableDictionary?alloc]?init]?;?? ??[dataDictionary?setValue:[NSNumber?numberWithInt:222]?forKey:@"intNumber"];?? ??[dataDictionary?setValue:[NSArray?arrayWithObjects:@"1",@"2",?nil]?forKey:@"testArray"];?? NSMutableDictionary *dataDictionary = [[NSMutableDictionary alloc] init] ;[dataDictionary setValue:[NSNumber numberWithInt:222] forKey:@"intNumber"];[dataDictionary setValue:[NSArray arrayWithObjects:@"1",@"2", nil] forKey:@"testArray"]; [dataDictionary?writeToFile:@"/Users/zhoumoban/Desktop/test.plist"?atomically:YES];?? [dataDictionary writeToFile:@"/Users/zhoumoban/Desktop/test.plist" atomically:YES]; NSDictionary?*dictionaryFromFile?=?[NSDictionary?dictionaryWithContentsOfFile:@"/Users/zhoumoban/Desktop/test.plist"];?? ???NSLog(@"%@",[dictionaryFromFile?objectForKey:@"intNumber"]);?? NSDictionary *dictionaryFromFile = [NSDictionary dictionaryWithContentsOfFile:@"/Users/zhoumoban/Desktop/test.plist"];NSLog(@"%@",[dictionaryFromFile objectForKey:@"intNumber"]); NSString?*error;?? ?????? ????NSData?*xmlData?=?[NSPropertyListSerialization?dataFromPropertyList:dataDictionary?format:NSPropertyListXMLFormat_v1_0?errorDescription:&error];?? ?????? ????if(xmlData)?{?? ????????NSLog(@"No?error?creating?XML?data.");?? ????????[xmlData?writeToFile:@"/Users/zhoumoban/Desktop/test2.plist"?atomically:YES];?? ????}?else?{?? ????????if?(error)?{?? ????????????NSLog(@"error:%@",?error);?? ???????????//?[error?release];?? ????????}?? ????}?? ?????//讀取?? ????NSDictionary?*dictionaryFromFile2?=?(NSDictionary?*)[NSPropertyListSerialization?propertyListWithData:[NSData?dataWithContentsOfFile:@"/Users/zhoumoban/Desktop/test2.plist"]?options:0?format:NULL?error:&error];?? ????NSLog(@"＝＝＝%@",[dictionaryFromFile2?objectForKey:@"intNumber"]);??
??歸檔?普通自定義對象和字節流之間的轉換
?序列化?某些特定類型（NSDictionary, NSArray, NSString, NSDate, NSNumber，NSData）的數據和字節流之間(通常將其保存為plist文件)的轉換
?
?2.1 歸檔
?如果我們需要將自定義的一個對象保存到文件，應該如何做呢？?
這里引入兩個東西：一個是NSCoding協議 ；另一個是NSKeyedArchiver，NSKeyedArchiver其實繼承于NSCoder，可以以鍵值對的方式將對象的屬性進行序列化和反序列化。?
具體的過程可以這樣描述?通過NSKeyedArchiver 可以將實現了NSCoding協議的對象 和 字節流 相互轉換?。
像一些框架中的數據類型如NSDictionary,NSArray,NSString... 都已經實現了NSCoding協議，所以可以直接對他們進行歸檔操作。
??這里來一個比較完整的例子，一個Address類，一個User類，User類下有個Address類型的屬性
Java代碼 ??
Java代碼 ??
Java代碼 ??
Java代碼 ??操作應用
Java代碼 ??
使用數據對象自帶的方法，如字典類寫文件：
數據：
Java代碼 ??寫文件
Java代碼 ??讀文件：
Java代碼 ??另外：使用NSPropertyListSerialization類。通過NSPropertyListSerialization類可以將數據對象直接轉成NSData或者直接寫到文件或者流中去
Java代碼 ?轉載于:https://www.cnblogs.com/lovewx/p/4158999.html
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