Implementing Autocomplete in iOS

Implementing Autocomplete in iOS

You may want to use this repo HTAutocompleteTextField, perfect solution.

How to implement Autocomplete in UISearchbar without UITableview?

First, you need to have a NSArray containing all of the data that you want to provide as potential options for the user. here i am using an NSMutableArray of pastURLs, and every time the user browses to a URL we’ll add it to the array.
Next, you need to create a view to display the URLs that the user can select from. One good way of doing this is just to create a table view below the input field that lists all of the potential options. This table view can appear only when the user is typing data into the text field, and can be hidden the rest of the time.

autocompleteTableView = [[UITableView alloc] initWithFrame:
    CGRectMake(0, 80, 320, 120) style:UITableViewStylePlain];
autocompleteTableView.delegate = self;
autocompleteTableView.dataSource = self;
autocompleteTableView.scrollEnabled = YES;
autocompleteTableView.hidden = YES;  
[self.view addSubview:autocompleteTableView];

Use UITextFieldDelegate and implementing the shouldChangeCharactersInRange protocol.

- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string {
  autocompleteTableView.hidden = NO;

  NSString *substring = [NSString stringWithString:textField.text];
  substring = [substring 
    stringByReplacingCharactersInRange:range withString:string];
  [self searchAutocompleteEntriesWithSubstring:substring];
  return YES;
}

- (void)searchAutocompleteEntriesWithSubstring:(NSString *)substring {

  // Put anything that starts with this substring into the autocompleteUrls array
  // The items in this array is what will show up in the table view
  [autocompleteUrls removeAllObjects];
  for(NSString *curString in pastUrls) {
    NSRange substringRange = [curString rangeOfString:substring];
    if (substringRange.location == 0) {
      [autocompleteUrls addObject:curString];  
    }
  }
  [autocompleteTableView reloadData];
}

for more details check : Tutorial

Or download demo app: Demo App

how to implement autocomplete in google search for a IOS application?

You can retrieve the google suggestions in json format by sending a request to http://google.com/complete/search?output=toolbar&client=chrome&q=SEARCHTERM

Implement a autocomplete textfield Objective C

You can build this behaviour yourself using the UITextFieldDelegate methods
( implement the delegate in your UIView

@interface someViewController : UIViewController <UITextFieldDelegate> 

In doing this you get access to whatever the user has typed in

- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string

Where you can compare it to the items in your array and display another UIView or a custom button that when selected populates your text field.

Don't forget to tell your textfield who it's delegate should be, probably in your viewDidLoad method, but can also be done in the xib view

myTextField.delegate = self;

I know this seems laborious but it will be extremely gratifying.
Here's the apple doc for the UITextViewDelegate

Trick to get appropriate auto complete method in xcode

You just start typing cellForRowAtIndexPath you will get that particular method. No need to type from tableView...blah blah... Just type the methods main phrase, then you will get correct method in suggestion.

Thanks:)

How do I implement autocomplete table view google maps swift?

You are printing an attributed string. This should not appear when you display it in a UILable'sattributedText property. See my example below

when you call for result in results save results in an array and reload the tableview by calling tableView.reloadData. In your tableView data source set the number of rows to the number of items in your array. Then inside cellForRowAtIndexPath do the following

let result = resultArray[indexPath.row] as? GMSAutocompletePrediction
cell.textLabel.attributedText = result.attributedPrimaryText

How to implement auto-complete for address using Apple Map Kit

Update - I've created a simple example project here using Swift 3 as the original answer was written in Swift 2.

In iOS 9.3 a new class called MKLocalSearchCompleter was introduced, this allows the creation of an autocomplete solution, you simply pass in the queryFragment as below:

var searchCompleter = MKLocalSearchCompleter()
searchCompleter.delegate = self
var searchResults = [MKLocalSearchCompletion]()

searchCompleter.queryFragment = searchField.text!

Then handle the results of the query using the MKLocalSearchCompleterDelegate:

extension SearchViewController: MKLocalSearchCompleterDelegate {

    func completerDidUpdateResults(completer: MKLocalSearchCompleter) {
        searchResults = completer.results
        searchResultsTableView.reloadData()
    } 

    func completer(completer: MKLocalSearchCompleter, didFailWithError error: NSError) {
        // handle error
    }
}

And display the address results in an appropriate format:

func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
    let searchResult = searchResults[indexPath.row]
    let cell = UITableViewCell(style: .subtitle, reuseIdentifier: nil)
    cell.textLabel?.text = searchResult.title
    cell.detailTextLabel?.text = searchResult.subtitle
    return cell
}

You can then use a MKLocalCompletion object to instantiate a MKLocalSearch.Request, thus gaining access to the MKPlacemark and all other useful data:

let searchRequest = MKLocalSearch.Request(completion: completion!)
let search = MKLocalSearch(request: searchRequest)
search.startWithCompletionHandler { (response, error) in
    if error == nil {
        let coordinate = response?.mapItems[0].placemark.coordinate
    }
}

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