Understanding a logic in update/add - NSUserDefaults (Objective C) - objective-c

Question

I'm writing a nice class to handle call block in NSUserDefaults.
Haven't tested it yet, but I think I miss something regarding update/add by callBlockID.
My Code:
My Code:
#implementation UserDefaultHandler
+ (UserDefaultHandler *)sharedInstance
{
static UserDefaultHandler *instance;
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
instance = [[UserDefaultHandler alloc] init];
});
return instance;
}
-(void)updateOrAddCallBlock:(NSMutableDictionary*)callBlockObject
{
NSString *callBlockID = [callBlockObject objectForKey:#"callBlockID"];
BOOL needToUpdate = NO;
NSInteger indexDict = 0;
NSMutableArray *arrayOfAllCallBlock = [[NSMutableArray alloc] init];
arrayOfAllCallBlock = (NSMutableArray*)[[NSUserDefaults standardUserDefaults] objectForKey:#"arrayOfAllCallBlock"];
NSMutableDictionary *newDict = [[NSMutableDictionary alloc] init];
if (arrayOfAllCallBlock.count <= 0 || arrayOfAllCallBlock == nil)
{
[arrayOfAllCallBlock addObject:callBlockObject];
}
else
{
for (int i = 0; i < arrayOfAllCallBlock.count; i++)
{
NSMutableDictionary *mutableDict = [arrayOfAllCallBlock objectAtIndex:i];
NSString *idFromDict = [mutableDict objectForKey:#"callBlockID"];
if ([idFromDict isEqualToString:callBlockID])
{
needToUpdate = YES;
indexDict = i;
newDict = mutableDict;
}
}
if (needToUpdate)
{
[arrayOfAllCallBlock removeObjectAtIndex:indexDict];
[arrayOfAllCallBlock insertObject:newDict atIndex:indexDict];
}
else
{
[arrayOfAllCallBlock addObject:callBlockObject];
}
}
[self saveGlobalDict:arrayOfAllCallBlock];
}
- (NSMutableDictionary *)getCallBlockByID:(NSString*)callBlockID
{
NSMutableArray *arrayOfAllCallBlock = (NSMutableArray*)[[NSUserDefaults standardUserDefaults] objectForKey:#"arrayOfAllCallBlock"];
BOOL isFound = NO;
NSInteger indexDict = 0;
NSMutableDictionary *newDict = [[NSMutableDictionary alloc] init];
for (int i = 0; i < arrayOfAllCallBlock.count; i++)
{
NSMutableDictionary *mutableDict = [arrayOfAllCallBlock objectAtIndex:i];
NSString *idFromDict = [mutableDict objectForKey:#"callBlockID"];
if ([idFromDict isEqualToString:callBlockID])
{
isFound = YES;
indexDict = i;
newDict = mutableDict;
}
}
if (isFound)
{
return newDict;
}
else
{
return nil;
}
}
- (NSMutableArray*)getAllCallBlock
{
NSMutableArray *arrayOfAllCallBlock = (NSMutableArray*)[[NSUserDefaults standardUserDefaults] objectForKey:#"arrayOfAllCallBlock"];
return arrayOfAllCallBlock;
}
- (void)clearCallBlockDB
{
[[NSUserDefaults standardUserDefaults] removeObjectForKey:#"arrayOfAllCallBlock"];
[[NSUserDefaults standardUserDefaults] synchronize];
}
- (void)saveGlobalDict:(NSMutableArray*)globalArray
{
self.globalArray = [[NSMutableArray alloc] init];
self.globalArray = globalArray;
[self clearCallBlockDB];
[[NSUserDefaults standardUserDefaults] setObject:self.globalArray forKey:#"arrayOfAllCallBlock"];
[[NSUserDefaults standardUserDefaults] synchronize];
}
- (void)clearSingleCallBlock:(NSString*)callBlockID
{
NSMutableArray *array = [[NSMutableArray alloc] init];
array = [self getAllCallBlock];
NSMutableDictionary *specificDict = [[NSMutableDictionary alloc] init];
NSInteger getIndex = [self getIndexForCallBlock:array specificDict:specificDict];
[array removeObjectAtIndex:getIndex];
[self saveGlobalDict:array];
}
- (NSInteger)getIndexForCallBlock:(NSMutableArray*)arrayOfAllCallBlock specificDict:(NSMutableDictionary*)specificDict
{
NSInteger getIndex = 0;
for (int i = 0; i < arrayOfAllCallBlock.count; i++)
{
NSMutableDictionary *mutableDict = [arrayOfAllCallBlock objectAtIndex:i];
NSDictionary *dict_one = [specificDict copy];
NSDictionary *dict_two = [mutableDict copy];
if ([dict_two isEqualToDictionary:dict_one])
{
getIndex = i;
}
}
return getIndex;
}
#end
I'll explain: I've a UITableView and when I add a row to it, I've a new window to put details, save and present back in UITableView.
Also, I've an edit button so I can edit and update a row in the table.
Adding a row to table create a unique string (callBlockID).
I'm not sure how to handle it and whether or not my code is enough.
Any ideas?