NSArray of Dictionary in Objective C

//logic

NSMutableArray* tempArray = [NSMutableArray new];

for (NSDictionary* custumerDetails in tempArrayCustomers) {
     
	NSMutableDictionary *prunedDictionary = [NSMutableDictionary dictionary];
	for (NSString * key in [custumerDetails allKeys])
	{
		if (![[custumerDetails objectForKey:key] isKindOfClass:[NSNull class]]){
			[prunedDictionary setObject:[custumerDetails objectForKey:key] forKey:key];
		}else{
			[prunedDictionary setObject:@"" forKey:key];
		}
	}
	[tempArray addObject:prunedDictionary];
     
}
tempArrayCustomers = [tempArray copy];



//method

-(NSMutableArray*)pruneArrayOfDictionaries:(NSMutableArray*)arrayToPrune{
    NSMutableArray* tempArray = [NSMutableArray new];
    for (NSDictionary* custumerDetails in arrayToPrune) {
        
        NSMutableDictionary *prunedDictionary = [NSMutableDictionary dictionary];
        for (NSString * key in [custumerDetails allKeys])
        {
            if (![[custumerDetails objectForKey:key] isKindOfClass:[NSNull class]]){
                [prunedDictionary setObject:[custumerDetails objectForKey:key] forKey:key];
            }else{
                [prunedDictionary setObject:@"" forKey:key];
            }
        }
        [tempArray addObject:prunedDictionary];
        
    }
    return tempArray;
}

NSDictionary in Swift

for (key, value) in CustomerDetails{
                        let keyInDict = key as! String
                        if let valueInDict = value as? String{
                            
                        }else{
                            CustomerDetails.setValue("", forKey: keyInDict)
                        }
                        
                    }