Hi,
I'm fairly new at iOS programming, but I managed to make a (in my opinion quite nice) app for the app store. The main function for my next update will be a search option for the app. I followed a tutorial I found on the internet and adapted it to fit my app. I got back quite some errors, most of which I managed to fix. But now I'm completely stuck and don't know what to do next. I know it's a lot to ask, but if anyone could take a look at the code underneath, it would be greatly appreciated.
Thanks!
//
// RootViewController.m
// GGZ info
//
// Created by Thijs Beckers on 29-12-10.
// Copyright 2010 __MyCompanyName__. All rights reserved.
//
#import "RootViewController.h"
// Always import the next level view controller header(s)
#import "CourseCodes.h"
@implementation RootViewController
@synthesize dataForCurrentLevel, tableViewData;
#pragma mark -
#pragma mark View lifecycle
// OVERRIDE METHOD
- (void)viewDidLoad {
[super viewDidLoad];
// Go get the data for the app...
// Create a custom string that points to the right location in the app bundle
NSString *pathToPlist = [[NSBundle mainBundle] pathForResource:@"SCSCurriculum" ofType:@"plist"];
// Now, place the result into the dictionary property
// Note that we must retain it to keep it around
dataForCurrentLevel = [[NSDictionary dictionaryWithContentsOfFile:pathToPlist] retain];
// Place the top level keys (the program codes) in an array for the table view
// Note that we must retain it to keep it around
// NSDictionary has a really useful instance method - allKeys
// The allKeys method returns an array with all of the keys found in (this level of) a dictionary
tableViewData = [[[dataForCurrentLevel allKeys] sortedArrayUsingSelector:@selector(caseInsensitiveCompare:)] retain];
//Initialize the copy array.
copyListOfItems = [[NSMutableArray alloc] init];
// Set the nav bar title
self.title = @"GGZ info";
//Add the search bar
self.tableView.tableHeaderView = searchBar;
searchBar.autocorrectionType = UITextAutocorrectionTypeNo;
searching = NO;
letUserSelectRow = YES;
}
/*
- (void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
}
*/
/*
- (void)viewDidAppear:(BOOL)animated {
[super viewDidAppear:animated];
}
*/
/*
- (void)viewWillDisappear:(BOOL)animated {
[super viewWillDisappear:animated];
}
*/
/*
- (void)viewDidDisappear:(BOOL)animated {
[super viewDidDisappear:animated];
}
*/
//RootViewController.m
- (void) searchBarTextDidBeginEditing:(UISearchBar *)theSearchBar {
searching = YES;
letUserSelectRow = NO;
self.tableView.scrollEnabled = NO;
//Add the done button.
self.navigationItem.rightBarButtonItem = [[[UIBarButtonItem alloc]
initWithBarButtonSystemItem:UIBarButtonSystemItemDone
target:self action:@selector(doneSearching_Clicked:)] autorelease];
}
- (NSIndexPath *)tableView :(UITableView *)theTableView willSelectRowAtIndexPath:(NSIndexPath *)indexPath {
if(letUserSelectRow)
return indexPath;
else
return nil;
}
//RootViewController.m
- (void)searchBar:(UISearchBar *)theSearchBar textDidChange:(NSString *)searchText {
//Remove all objects first.
[copyListOfItems removeAllObjects];
if([searchText length] > 0) {
searching = YES;
letUserSelectRow = YES;
self.tableView.scrollEnabled = YES;
[self searchTableView];
}
else {
searching = NO;
letUserSelectRow = NO;
self.tableView.scrollEnabled = NO;
}
[self.tableView reloadData];
}
//RootViewController.m
- (void) searchBarSearchButtonClicked:(UISearchBar *)theSearchBar {
[self searchTableView];
}
- (void) searchTableView {
NSString *searchText = searchBar.text;
NSMutableArray *searchArray = [[NSMutableArray alloc] init];
for (NSDictionary *dictionary in listOfItems)
{
NSArray *array = [dictionary objectForKey:@"Countries"];
[searchArray addObjectsFromArray:array];
}
for (NSString *sTemp in searchArray)
{
NSRange titleResultsRange = [sTemp rangeOfString:searchText options:NSCaseInsensitiveSearch];
if (titleResultsRange.length > 0)
[copyListOfItems addObject:sTemp];
}
[searchArray release];
searchArray = nil;
}
//RootViewController.m
- (void) doneSearching_Clicked:(id)sender {
searchBar.text = @"";
[searchBar resignFirstResponder];
letUserSelectRow = YES;
searching = NO;
self.navigationItem.rightBarButtonItem = nil;
self.tableView.scrollEnabled = YES;
[self.tableView reloadData];
}
//RootViewController.m
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
if (searching)
return 1;
else
return [listOfItems count];
}
// Customize the number of rows in the table view.
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
if (searching)
return [copyListOfItems count];
else {
//Number of rows it should expect should be based on the section
NSDictionary *dictionary = [listOfItems objectAtIndex:section];
NSArray *array = [dictionary objectForKey:@"Countries"];
return [array count];
}
}
- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section {
if(searching)
return @"";
if(section == 0)
return @"Countries to visit";
else
return @"Countries visited";
}
// Customize the appearance of table view cells.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = @"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithFrame:CGRectZero reuseIdentifier:CellIdentifier] autorelease];
}
// Set up the cell...
if(searching)
cell.text = [copyListOfItems objectAtIndex:indexPath.row];
else {
//First get the dictionary object
NSDictionary *dictionary = [listOfItems objectAtIndex:indexPath.section];
NSArray *array = [dictionary objectForKey:@"Countries"];
NSString *cellValue = [array objectAtIndex:indexPath.row];
cell.text = cellValue;
}
return cell;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
//Get the selected country
NSString *selectedCountry = nil;
if(searching)
selectedCountry = [copyListOfItems objectAtIndex:indexPath.row];
else {
NSDictionary *dictionary = [listOfItems objectAtIndex:indexPath.section];
NSArray *array = [dictionary objectForKey:@"Countries"];
selectedCountry = [array objectAtIndex:indexPath.row];
}
//Initialize the detail view controller and display it.
DetailViewController *dvController = [[DetailViewController alloc] initWithNibName:@"DetailView" bundle:[NSBundle mainBundle]];
dvController.selectedCountry = selectedCountry;
[self.navigationController pushViewController:dvController animated:YES];
[dvController release];
dvController = nil;
}
//RootViewController.m
- (void) searchBarTextDidBeginEditing:(UISearchBar *)theSearchBar {
//Add the overlay view.
if(ovController == nil)
ovController = [[OverlayViewController alloc] initWithNibName:@"OverlayView" bundle:[NSBundle mainBundle]];
CGFloat yaxis = self.navigationController.navigationBar.frame.size.height;
CGFloat width = self.view.frame.size.width;
CGFloat height = self.view.frame.size.height;
//Parameters x = origion on x-axis, y = origon on y-axis.
CGRect frame = CGRectMake(0, yaxis, width, height);
ovController.view.frame = frame;
ovController.view.backgroundColor = [UIColor grayColor];
ovController.view.alpha = 0.5;
ovController.rvController = self;
[self.tableView insertSubview:ovController.view aboveSubview:self.parentViewController.view];
searching = YES;
letUserSelectRow = NO;
self.tableView.scrollEnabled = NO;
//Add the done button.
self.navigationItem.rightBarButtonItem = [[[UIBarButtonItem alloc]
initWithBarButtonSystemItem:UIBarButtonSystemItemDone
target:self action:@selector(doneSearching_Clicked:)] autorelease];
}
// Override to allow orientations other than the default portrait orientation.
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
// Return YES for supported orientations.
return YES;
}
- (void)didReceiveMemoryWarning {
// Releases the view if it doesn't have a superview.
[super didReceiveMemoryWarning];
// Relinquish ownership any cached data, images, etc that aren't in use.
}
- (void)viewDidUnload {
// Relinquish ownership of anything that can be recreated in viewDidLoad or on demand.
// For example: self.myOutlet = nil;
}
- (void)dealloc {
[dataForCurrentLevel release];
[tableViewData release];
[super dealloc];
}
#pragma mark -
#pragma mark Table view methods
// DATA SOURCE METHOD
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return 1;
}
// DATA SOURCE METHOD
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
// How many rows should be displayed?
return [tableViewData count];
}
// DELEGATE METHOD
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
// Cell reuse block
static NSString *CellIdentifier = @"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
}
// Configure the cell's contents - we want the program code, and a disclosure indicator
cell.textLabel.text = [tableViewData objectAtIndex:indexPath.row];
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
return cell;
}
//RootViewController.m
- (void)searchBar:(UISearchBar *)theSearchBar textDidChange:(NSString *)searchText {
//Remove all objects first.
[copyListOfItems removeAllObjects];
if([searchText length] > 0) {
[ovController.view removeFromSuperview];
searching = YES;
letUserSelectRow = YES;
self.tableView.scrollEnabled = YES;
[self searchTableView];
}
else {
[self.tableView insertSubview:ovController.view aboveSubview:self.parentViewController.view];
searching = NO;
letUserSelectRow = NO;
self.tableView.scrollEnabled = NO;
}
[self.tableView reloadData];
}
//RootViewController.m
- (void) doneSearching_Clicked:(id)sender {
searchBar.text = @"";
[searchBar resignFirstResponder];
letUserSelectRow = YES;
searching = NO;
self.navigationItem.rightBarButtonItem = nil;
self.tableView.scrollEnabled = YES;
[ovController.view removeFromSuperview];
[ovController release];
ovController = nil;
[self.tableView reloadData];
}
// DELEGATE METHOD
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
// In any navigation-based application, you follow the same pattern:
// 1. Create an instance of the next-level view controller
// 2. Configure that instance, with settings and data if necessary
// 3. Push it on to the navigation stack
// In this situation, the next level view controller is another table view
// Therefore, we really don't need a nib file (do you see a CourseCodes.xib? no, there isn't one)
// So, a UITableViewController offers an initializer that programmatically creates a view
// 1. Create the next level view controller
// ========================================
CourseCodes *nextVC = [[CourseCodes alloc] initWithStyle:UITableViewStylePlain];
// 2. Configure it...
// ==================
// It needs data from the dictionary - the "value" for the current "key" (that was tapped)
NSDictionary *nextLevelDictionary = [dataForCurrentLevel objectForKey:[tableViewData objectAtIndex:indexPath.row]];
nextVC.dataForCurrentLevel = nextLevelDictionary;
// Set the view title
nextVC.title = [tableViewData objectAtIndex:indexPath.row];
// 3. Push it on to the navigation stack
// =====================================
[self.navigationController pushViewController:nextVC animated:YES];
// Memory manage it
[nextVC release];
}
/*
// Override to support conditional editing of the table view.
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath {
// Return NO if you do not want the specified item to be editable.
return YES;
}
*/
/*
// Override to support editing the table view.
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {
if (editingStyle == UITableViewCellEditingStyleDelete) {
// Delete the row from the data source.
[tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
}
else if (editingStyle == UITableViewCellEditingStyleInsert) {
// Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view.
}
}
*/
/*
// Override to support rearranging the table view.
- (void)tableView:(UITableView *)tableView moveRowAtIndexPath:(NSIndexPath *)fromIndexPath toIndexPath:(NSIndexPath *)toIndexPath {
}
*/
/*
// Override to support conditional rearranging of the table view.
- (BOOL)tableView:(UITableView *)tableView canMoveRowAtIndexPath:(NSIndexPath *)indexPath {
// Return NO if you do not want the item to be re-orderable.
return YES;
}
*/
@end
