自定义对象:
.h文件
- #import <Foundation/Foundation.h>
-
- @interface MyObject : NSObject
- {
- NSNumber* lowValue;
- NSNumber* highValue;
-
- NSString* titleString;
- }
- @property(nonatomic, retain)NSNumber* lowValue;
- @property(nonatomic, retain)NSNumber* highValue;
-
- @property(nonatomic, retain)NSString* titleString;
- @end
.m文件:
- #import "MyObject.h"
-
- @implementation MyObject
- @synthesize lowValue, highValue, titleString;
- - (void)encodeWithCoder:(NSCoder *)encoder
- {
- [encoder encodeObject:self.lowValue forKey:@"lowValue"];
- [encoder encodeObject:self.highValue forKey:@"highValue"];
- [encoder encodeObject:self.titleString forKey:@"titleString"];
- }
- - (id)initWithCoder:(NSCoder *)decoder
- {
- if(self = [super init])
- {
- self.lowValue = [decoder decodeObjectForKey:@"lowValue"];
- self.highValue = [decoder decodeObjectForKey:@"highValue"];
- self.titleString = [decoder decodeObjectForKey:@"titleString"];
- }
- return self;
- }
-
- @end
保存单个MyObject方法:
- - (void)saveCustomObject:(MyObject *)obj
- {
- NSData *myEncodedObject = [NSKeyedArchiver archivedDataWithRootObject:obj];
- NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
- [defaults setObject:myEncodedObject forKey:@"myEncodedObjectKey"];
- }
- - (MyObject *)loadCustomObjectWithKey:(NSString *)key
- {
- NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
- NSData *myEncodedObject = [defaults objectForKey:key];
- MyObject *obj = (MyObject *)[NSKeyedUnarchiver unarchiveObjectWithData: myEncodedObject];
- return obj;
- }
-
- 保存:
- MyObject* testObj = [[MyObject alloc] init];
- testObj.lowValue =[NSNumber numberWithFloat:122.2 ];
- testObj.highValue = [NSNumber numberWithFloat:19888 ];
- testObj.titleString = @“baoyu”;
-
- 读取:
- MyObject* obj = [self loadCustomObjectWithKey:@"myEncodedObjectKey"];
- NSLog(@"%f, %f, %@", [obj.lowValue floatValue], [obj.highValue floatValue], obj.titleString);
保存多个MyObject方法:
- 保存:
- NSMutableArray* array = [[NSMutableArray alloc] init];
- for(int i=0; i<3; i++)
- {
- MyObject* testObj = [[MyObject alloc] init];
- testObj.lowValue =[NSNumber numberWithFloat:122.2+i ];
- testObj.highValue = [NSNumber numberWithFloat:19888+i ];
- testObj.titleString = [NSString stringWithFormat:@"BAOYU%d", i];
-
- [array addObject:testObj];
-
- }
- [[NSUserDefaults standardUserDefaults] setObject:[NSKeyedArchiver archivedDataWithRootObject:array] forKey:@"myarray"];
-
-
- 读取:
- NSData* data = [[NSUserDefaults standardUserDefaults] objectForKey:@"myarray"];
-
-
- NSArray *oldSavedArray = [NSKeyedUnarchiver unarchiveObjectWithData:data];
- for(MyObject* obj in oldSavedArray)
- {
- NSLog(@"%f, %f, %@", [obj.lowValue floatValue], [obj.highValue floatValue], obj.titleString);
- }
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