Implement a autocomplete textfield Objective C - ios

I am starting to work with text fields, and I want to implement a functionality with a custom autocomplete.
In a lot of blogs and answer, implement it with UITables to show the autocomplete, but I do not need this, I need to create a autocomplete like a iPhone function, where show a pop out with the filter but only with my array of words.
For example.
my_array = #{"apple","banana","pear","orange","berry"}
When I type "app" the text field only need to show me "apple" but not complete the text in the text field, should show the pop up with the autocomplete.
Something like this but only with my array.

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

I've implemented a custom auto complete textfield few days ago and the raywenderlich tutorial was helpful.
http://www.raywenderlich.com/336/auto-complete-tutorial-for-ios-how-to-auto-complete-with-custom-values
You probably need to implement your own table view to make it look like the screen you attached. The short tutorial will give you an idea how it should be done. I will post my code tomorrow if you want.

Related

Apple watch interface

I am designing apple watch application where i need to show top10 feed title and i have successfully shown it. in next step i have to add action event to tap which will redirect user to next screen but i am confused which controller to use here. i have to show all feeds in pagination format and then on click i have to show its detail view.
does anyone tried with this approach? i am using UIButton over there but its having text limitation so cant use it and for tableview it scroll verticaly where as i need horizantle scroll.
alph0x's answer is pretty useful. But you can also do another thing to perform what you are asking in case you only want that the action will do when push in a specific button of the row.
This second solution consists on create a class for the custom row with an IBAction
#import <WatchKit/WatchKit.h>
#interface MyRow : NSObject
// Methods
- (IBAction)buttonClick;
#end
And in the buttonClick method, you can specify the action as in the follow example using pushControllerWithName:context to go to a specific interface controller
#import "MyRow.h"
#implementation MyRow
- (IBAction)buttonClick {
[self goToInterface:#"feedInterface"];
}
- (void)goToInterface:(NSString *)interfaceName{
NSDictionary *contextToSend = [NSDictionary dictionaryWithObjectsAndKeys:#"FeedTitle", #"title",
#"lalala", #"secondValue",
#"lelele", #"thirdValue",
#"other value", #"other", nil];
[self pushControllerWithName:interfaceName context:contextToSend];
}
#end
You can send your row info through context. In that example I have decided to send a dictionary with some values.
In the interfaceName param you have to specify the Interface Controller Identifier that you can set in your storyboard. See the image below:
And tell to the XCode that your table row has the custom class MyRow
Note: don't forget to assign your button to the IBAction method ;)
If I understand, you need to have a table with 10 rows, and you need to be able to tap in one row, and view the details about the one you selected, if thats correct, you only need to use the Method from WKInterfaceTable "- (id)rowControllerAtIndex:(NSInteger)index", with this one (works like UITableView one with the delegate) you can handle every row action after being tapped.

UITextField Number formatter when setting or editing text

I have UITextField that I have formatting code attached on textFieldDidEndEditing:. This works fine, but when I first load the text field with a text value (someTextField.text = #"...") the formatting doesn't happen. Of course, I can add another formatter there, but it seems kind of repetitive.
Is there a way to make all changes to a UITextField, programmatic or user originated, have formatting applied automatically?
Just run the same method from both places...
- (void)setTextFieldWithText:(NSString *)text {
//do formatting here...
self.textField.text = formattedText;
}
You can either add UITextFieldDidChangeNotification or just add a observer(using the addObserver method) to observe changes to the textfield. Choose which suits your approach. Both of them does cut the repetitive code. KVO - concept related to your question.
you might get some idea if you take a look at the following links
UITextFieldDidChangeNotification - How do i notify changes in UITextField?
addObserver method - detecting the change of content of UITextField when the change is not made by the keyboard
Note: Although the classes of the UIKit framework generally do not support KVO, you can still implement it in the custom objects of your application, including custom views.

Not all UITextFields are calling all delegate methods

I've got a view controller xib file with several views in it. I'm building a wizard-type interface. I'm just doing a simple fade between the views, and I'm already using a navigation controller for the main interface. I'd prefer not to use one for this wizard. Anyway, in the views, each panel has at least a button, some sort of input field (usually a UITextField) and some helper text hard coded in a UILabel.
The problem is that not all the UITextField objects are calling the textFieldDidChange method in the delegate (File's Owner - .m file associated with the xib), but all the UITextField objects ARE calling the textFieldDidBeginEditing method.
Makes no sense to me. I feel like I must be missing something simple in how I set up the screens, but I'll be darned if I can figure it out. Each of the screens all look identical in the property sheets (on the right hand side of Xcode), and everything is wired up correctly in the File's Owner property sheet, both in IBOutlet and IBActions.
Here are some shots of what's going on...
Ideas? Thanks.
Here are links to the screen caps of the vital parts.
(being a new member is making it hard to add all the info I need with screen caps!)
As far as I now, there is no delegate method with the header textFieldDidChange. You have created a method of your own, which is depending on a NSNotification. Make sure all the UITextFields are send the right notification.
There is no such method on a UITextFieldDelegate
You may have confused textViewDidChange, which is a delegate method for a UITextView, but itis passed the UITextView that generated the event, not an NSNotification.
Seems like you want textField:shouldChangeCharactersInRange:replacementString: instead.
This is resolved. I'm a knucklehead. :-)
I was attaching my own notifier/observer and hadn't done so for the last few UITextField objects. Sorry to bother y'all.

IOS textFieldDidChange when outlet in other class

I've got a specific iOS question when accessing an outlet on a different class.
In my project I have a UItableView with custom tableViewCells which I have created using the interface builder. These cells have UItextfields on them and I need to know when a value of a certain textfield is changed. (so I can add a new empty cell with textfield, just like in your address book) I came across the following function
[UITextfield addTarget:self action:#selector(textFieldDidChange:) forControlEvents:UIControlEventEditingChanged];
The problem is that I use this function in the main class when the outlet of the textfield is in the subclass (specific tableViewCell class).
I Created an Method of the outlet so I could access it in the main class. But still is above code does not trigger the textFieldDidChange event.
Hope someone could help me with this problem. Or give me a different solution to achieve my goal (creating an new empty textfield when adding the first character to the current UITextfield).
Thnx
textFieldDidChange doesn't work. Well, I had a lot of problems with it.
I don't know if it's deprecated or something.
Either way you can use shouldChangeCharacterInRange almost same way as long as it's delegated correctly.
But you have to modify it a bit because the method is triggered before you actually typed something. So you have to get the new value and add it yourself.
- (BOOL) textField:(UITextField *)aTextField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string {
// Check the replacementString
return YES;
}

Getting the Value of a UITextField as keystrokes are entered?

Let's say I have the following code:
IBOutlet UITextField* nameTextField;
IBOutlet UILabel* greetingLabel;
I'd like the greetingLabel to read "Hello [nameTextField]" as soon as the user presses any key.
What I need basically is the iPhone equivalent of the Cocoa delegate method controlTextDidChange.
The textField:shouldChangeCharactersInRange: delegate method is called each time a keystroke occurs:
- (BOOL) textField:(UITextField *)textField
shouldChangeCharactersInRange:(NSRange)range
replacementString:(NSString *)string
The string argument returns the character that is pressed. The actual textField's value (nameTextField.text) remains blank however.
What am I missing here? (I'd like nameTextField to reflect the exact string that the user has entered so far).
It turns out, the easiest way to do this is using Interface Builder:
Add a IBAction (to the ViewController, say, as in this case)
Ctrl-Click (or right click) on the UITextField in Interface Builder
Connect the "Editing Changed" event to the File's Owner's IBAction added in the first step.
Works like a charm :) (I can't believe I spent numerous days on this, and to realize now that the solution was much simpler than I'd thought :P)
you could register an action for the event UIControlEventEditingChanges on the text field:
[nameTextField addTarget:self action:#selector(updateLabelUsingContentsOfTextField:) forControlEvents:UIControlEventEditingChanged];
...
// TODO: error checking
- (void)updateLabelUsingContentsOfTextField:(id)sender {
greetingLabel.text = [NSString stringWithFormat:#"Hello %#", ((UITextField *)sender).text];
}
UITextField has a notification UITextFieldTextDidChange which will be fired every time the text changes if you register for it. Just register for that notification and in the method called by the notification, change the label's text.
To add to this, the object passed to your notification handler will have the text of the UITextField.
Hope that helps.

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