我有一些存储在数组中的自定义类对象，然后将该数组存储在带有键的字典中。然后保存并在应用程序加载/重新加载时加载。
现在的问题是我似乎无法将自定义对象取出，当我加载数组时它返回为空。我必须在写入或加载数据时做错了，但我无法弄清楚到底是什么。
这是我到目前为止的代码：
CustomClass.H 文件：
#import <Foundation/Foundation.h>
@interface PersonClass : NSObject <NSCoding>
@property (nonatomic,strong) NSString *personName;
@property (nonatomic,strong) NSString *personNo;
@property (nonatomic,strong) NSString *personNotes;
@property (nonatomic) BOOL switchPersonality;
@property (nonatomic) BOOL switchChemistry;
@property (nonatomic) BOOL switchLooks;
@property (nonatomic) BOOL switchHumour;
@property (nonatomic) int personRating;
@property (nonatomic,strong) NSNumber *personRecord;
- (id)initWithName:(NSString *)iPersonName PersonNo:(NSString *)iPersonNo PersonNotes:(NSString *)iPersonNotes SwitchChemistry:(BOOL *)iSwitchChemistry SwitchHumour:(BOOL *)iSwitchHumour SwitchLooks:(BOOL *)iSwitchLooks SwitchPersonality:(BOOL *)iSwitchPersonality PersonRating:(int *)iPersonRating PersonRecord:(NSNumber *)iPersonRecord;
@end
自定义 Class.M 文件：
- (void)encodeWithCoder:(NSCoder *)aCoder{
[aCoder encodeObject:personName forKey:@"pName"];
[aCoder encodeObject:personNo forKey:@"pNo"];
[aCoder encodeObject:personNotes forKey:@"pNotes"];
[aCoder encodeInt:personRating forKey:@"pRating"];
[aCoder encodeObject:personRecord forKey:@"pRecord"];
[aCoder encodeBool:switchChemistry forKey:@"sChemistry"];
[aCoder encodeBool:switchHumour forKey:@"sHumour"];
[aCoder encodeBool:switchLooks forKey:@"sLooks"];
[aCoder encodeBool:switchPersonality forKey:@"sPersonality"];
}
-(id)initWithCoder:(NSCoder *)aDecoder{
if (self = [super init]){
self.personName = [aDecoder decodeObjectForKey:@"pName"];
self.personNo = [aDecoder decodeObjectForKey:@"pNo"];
self.personNotes = [aDecoder decodeObjectForKey:@"pNotes"];
self.personRating = [aDecoder decodeIntForKey:@"pRating"];
self.personRecord = [aDecoder decodeObjectForKey:@"pRecord"];
self.switchChemistry = [aDecoder decodeBoolForKey:@"sChemistry"];
self.switchHumour = [aDecoder decodeBoolForKey:@"sHumour"];
self.switchLooks = [aDecoder decodeBoolForKey:@"sLooks"];
self.switchPersonality = [aDecoder decodeBoolForKey:@"sPersonality"];
}
return self;
}
保存方法：
- (void)saveData{
// get paths from root direcory
NSArray *paths = NSSearchPathForDirectoriesInDomains (NSDocumentDirectory, NSUserDomainMask, YES);
// get documents path
NSString *documentsPath = [paths objectAtIndex:0];
// get the path to our Data/plist file
NSString *plistPath = [documentsPath stringByAppendingPathComponent:@"data.plist"];
NSLog(@"PList Path %@",plistPath);
//new array
NSMutableArray *newEntries = [[NSMutableArray alloc]init];
NSLog(@"NEW ENTRIES BEFORE %@",newEntries);
for (PersonClass *person in peopleEntries) {
//encode the object
[NSKeyedArchiver archivedDataWithRootObject:person];
// add the object to the entries
[newEntries addObject:person];
}
NSLog(@"NEW ENTRIES AFTER %@",newEntries);
[newEntries writeToFile:plistPath atomically:YES];
// create dictionary with arrays and their corresponding keys
NSDictionary *plistDict = [NSDictionary dictionaryWithObjects: [NSMutableArray arrayWithObjects:newEntries, recordId, nil] forKeys:[NSMutableArray arrayWithObjects: @"peopleEntries",@"recordId", nil]];
NSLog(@"DICTIONARY IS IN SAVE %@",plistDict);
NSString *error = nil;
// check if plistData exists
if(plistDict)
{
// write plistData to our Data.plist file
[plistDict writeToFile:plistPath atomically:YES];
}
else
{
NSLog(@"Error in saveData: %@", error);
}
NSLog(@"Save RUN");
}
加载方法：
- (void)loadData{
// get paths from root direcory
NSArray *paths = NSSearchPathForDirectoriesInDomains (NSDocumentDirectory, NSUserDomainMask, YES);
// get documents path
NSString *documentsPath = [paths objectAtIndex:0];
// get the path to our Data/plist file
NSString *plistPath = [documentsPath stringByAppendingPathComponent:@"data.plist"];
NSLog(@"PList Path %@",plistPath);
// check to see if data.plist exists in documents
if (![[NSFileManager defaultManager] fileExistsAtPath:plistPath])
{
// return without loading
NSLog(@"RETURNING");
return;
}
// get saved dictionary
NSDictionary *dictionaryTemp = [[NSDictionary alloc]initWithContentsOfFile:plistPath];
NSLog(@"DICTIONARY IS LOAD %@",dictionaryTemp);
if (!dictionaryTemp)
{
NSLog(@"Error reading plist:");
}
// temporary array
NSMutableArray *holderOne = [dictionaryTemp objectForKey:@"peopleEntries"];
// array to be populated
NSMutableArray *holderTwo = [[NSMutableArray alloc]init];
NSLog(@"HOLDER ONE IS BEFORE %@",holderOne);
NSLog(@"HOLDER TWO IS BEFORE %@",holderTwo);
// go through the array and pull out person classes
for (NSData *person in holderOne) {
// temp array
NSData *entry = [holderOne objectAtIndex:person]; // check the object at index might be an issue???
NSLog(@"ENTRY IS %@",entry);
//deencode the object
[NSKeyedUnarchiver unarchiveObjectWithData:entry];
// add the object to the entries
[holderTwo addObject:entry];
}
NSLog(@"HOLDER ONE IS AFTER %@",holderOne);
NSLog(@"HOLDER TWO IS AFTER %@",holderTwo);
// assign values
peopleEntries = [NSMutableArray arrayWithArray:holderTwo];
NSLog(@"DICTIONARY IS AFTER ADDING %@",dictionaryTemp);
recordId = [NSNumber numberWithInt:[[dictionaryTemp objectForKey:@"recordId"]integerValue]];
NSLog(@"recordId is %@",recordId);
NSLog(@"LOAD RUN");
}