searchBar method doesn't work with my NSMutableArray (Obj-C) - ios

Question

My app retrieves data in JSON format and displays it in a table view. I'm trying to implement a search method but the app crashes. Any ideas?
I can't seem to find any solutions that work.
Update:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:#"Cell" forIndexPath:indexPath];
if (!isFiltered) {
Product *productObject;
productObject = [productsArray objectAtIndex:indexPath.row];
cell.textLabel.text = productObject.prodName;
//Accessory.
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
} else {
Product *productObject;
productObject = [self.filteredProductNameArray objectAtIndex:indexPath.row];
//Accessory.
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
}
return cell;
}

Answer 1

You are filling the productsArray with objects type of Product
[productsArray addObject:[[Product alloc] initWithProdID:pID andProdName:pName andProdDescription:pDescription andProdImage:pImage andProdManufacturer:pManufacturer andProdQuantity:pQuantity andProdPrice:pPrice]];
And then searching for NSString in it: for (NSString *str in productsArray).
Correct way of searching would be when you create separate array containing list of items to be search. E.g Array of products name, or description.
Simple example to approach
#property (strong, nonatomic) NSMutableArray *filteredProductNameArray;
So here this property will store Array of product's name
- (void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText {
NSMutableArray *productsNameArray = [[NSMutableArray alloc] init];
if (searchText.length == 0) {
isFiltered = NO;
self.filteredProductNameArray = self.productsArray; //If no str in textfield you should display all the data
}
else {
isFiltered = YES;
for (Product *product in self.productsArray) { //Because you have array type of Product, not NSString
NSString *productName = product.name; //Or method to access `name` property of the Product class
NSRange stringRange = [productName rangeOfString:searchText options:NSCaseInsensitiveSearch];
if (stringRange.location != NSNotFound) {
[productsNameArray addObject:productName];
}
}
}
self.filteredProductNameArray = productsNameArray;
// Here you got array of products name which matches string in search bar textfield. And it is the actual products name list to be displayed
[self.tableView reloadData];
}
Here. And in your
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
}
You should check whether the name property of self.productsArray at indexPath.row equals to self.filteredProductNameArray;
I've left the further steps, but I guess you've got the idea and can complete by yourself. If you have any questions feel free to ask, I will try to help

Answer 2

Your app crashes because productsArray contains objects that are of type Product not NSString.
So in your for loop change this:
for (NSString *str in productsArray)
into this
for (Product *product in productsArray)
Then get the NSString property of the product. I think you mean productName

Answer 3

you are using two different NSMutableArray for retrieveData and searchBar, try to use same which you have used in Table row and creating cell.

Answer 4

It may have something to do with the method you are using to fetch the JSON. dataWithContentsOfURL: should not be used for network-based URLs. dataWithContentsOfURL:
To fetch data over the network, take a look at NSURLSession.
Where is it crashing exactly? I suggest putting in a break point and stepping through this code. That will probably be the easiest way to find the source.