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Foundation 框架 归档
一、使用XML属性列表归档
此方法适用于NSString、NSDictionary、NSarray、NSDate、NSnumber，其中atomically参数表示先将字典写入临时备份文件，成功之后，把最终数据写入到dic指定的文件中
1 #import <Foundation/Foundation.h> 2 3 int main(int argc, const char * argv[]) 4 { 5 6 @autoreleasepool { 7 //生成字典dic，并将字典dic写到xml文件myFirstDic文件 8 NSDictionary *dic = @{@"wukong": @"so smart", @"ranHanLu": @"so beautiful", @"family": @"best importtant!"}; 9 if ([dic writeToFile: @"myFirstDic" atomically:YES] == NO) {10 NSLog(@"Write to file failed");11 }12 13 //读取14 dic = [NSDictionary dictionaryWithContentsOfFile: @"myFirstDic"];15 for (NSString *key in dic) {16 NSLog(@"key is: %@, value is : %@", key, dic[key]);17 }18 }19 return 0;20 }
二、适用NSKeyedUnarchiver类中得archiveRootObject:方法存储字典
此方法可直接用于将NSString、NSDictionary、NSarray、NSDate、NSnumber归档，要适用于所有对象，需要对重写encodeWithCoder和initWithCoder方法，见三
1 #import <Foundation/Foundation.h> 2 3 int main(int argc, const char * argv[]) 4 { 5 6 @autoreleasepool { 7 //适用NSKeyedUnarchiver类中得archiveRootObject:方法存储字典 8 9 NSDictionary *dic = @{10 @"wukong": @"so smart", @"ranHanLu": @"so beautiful", @"archive": @"ending...."11 };12 [NSKeyedArchiver archiveRootObject: dic toFile: @"dic.archive"];13 14 //读取15 NSDictionary *new;16 new = [NSKeyedUnarchiver unarchiveObjectWithFile: @"dic.archive"];17 for (NSString *key in new) {18 NSLog(@"key is: %@, value is : %@", key, new[key]);19 }20 21 }22 return 0;23 }
三、适用NSKeyedUnarchiver类中得archiveRootObject:方法，存储任意对象
1.首先需要对自定义对象添加协议方法 1 #import <Foundation/Foundation.h>
1 #import <Foundation/Foundation.h> 2 3 @interface testClass: NSObject 4 5 @property (copy, nonatomic) NSString *name, *address; 6 @end 7 8 @implementation testClass 9 //添加encodeWithCoder和initWithCoder方法10 -(void) encodeWithCoder: (NSCoder *) encoder11 {12 [encoder encodeObject: name forKey: @"testClassName"];13 [encoder encodeObject: address forKey: @"testClassAddress"];14 }15 16 -(id) initWithCoder: (NSCoder *) decoder17 {18 name = [decoder decodeObjectForKey: @"testClassName"];19 address = [decoder decodeObjectForKey: @"testClassAddress"];20 21 return self;22 }23 @synthesize name, address;24 25 @end26 int main(int argc, const char * argv[])27 {28 29 @autoreleasepool {30 testClass *myTest = [[testClass alloc] init];31 32 myTest.name = @"wukong";33 myTest.address = @"sichuan";34 //归档35 [NSKeyedArchiver archiveRootObject: myTest toFile: @"myTest.archive"];36 //读出37 myTest = [NSKeyedUnarchiver unarchiveObjectWithFile: @"myTest.archive"];38 NSLog(@"Name is : %@, address is : %@", myTest.name, myTest.address);39 40 }41 return 0;42 }
Foundation 框架 归档
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