IOS Swift finishing a function when a button is pressed

» ios » IOS Swift finishing a function when a button is pressed

By : Anna White

Date : November 29 2020, 09:01 AM

wish helps you I have a function that counts to 100 in about 10 secs. That func is called everytime a button is pressed and sent to a UILabel to be able to see it on the screen. , Try this:

code :

@IBAction func actionButton(sender: UIButton) {
sender.enabled = false
for i in 1...100 {
        let timeToDelay = Double(i)
        delay(timeToDelay / 4) {

            label.text = i

        }
}
sender.enabled = true

Share :

Finishing activity when back button is pressed (Alert Dialog)

By : Sameer Khan

Date : March 29 2020, 07:55 AM

this will help I'm working on an app which parses some json into a listview (background). I'm currently trying to deal with the errors when data is unavailable to populate the listview.

code :

...
builder.setOnCancelListener(new DialogInterface.OnCancelListener() {
    @Override
    public void onCancel(DialogInterface dialog) {
        // if from activity
        finish();
        // if activity is a field
        //activity.finish();
    }

});

...
AlertDialog alert = builder.create();
alert.setOnDismissListener(new DialogInterface.OnDismissListener() {
    @Override
    public void onDismiss(DialogInterface dialog) {
        finish();
    }
});
alert.show();

        if(args != null && args.equals(noData)){
             Toast.makeText(context, noData, Toast.LENGTH_LONG).show();
             finish();
        }

Show a dialog when the actionbar 'up' button is pressed, and prevent activity from finishing

By : Siatsky

Date : March 29 2020, 07:55 AM

Any of those help Unless you return true from onOptionsItemSelected(), you're basically telling Android "I didn't handle this, do whatever you are supposed to do with it".
In this case, since you want to intercept the home action, just return true after calling backPressed().

code :

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    switch (item.getItemId()) {
    case android.R.id.home:
        backPressed();
        return true;
    }
    return super.onOptionsItemSelected(item);
}

Swift - Call a function when button is pressed - unrecognized selector sent to instance

By : João Paulo Marto Per

Date : March 29 2020, 07:55 AM

This might help you I'm programmatically adding some buttons to my toolbar using swift. I've seen how to add an action to a button and I think I'm doing it correctly, but obviously I'm not because I keep getting "unrecognized selector sent to instance" when I press the button. What am I doing wrong? , Try to change target of refresh button:

code :

let refresh: UIBarButtonItem = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.Refresh, target: view, action: "refreshbuttonTapped:")

let refresh: UIBarButtonItem = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.Refresh, target: self, action: "refreshbuttonTapped:")

Fill button icon when button pressed in swift

By : fjfuentes

Date : March 29 2020, 07:55 AM

hop of those help? Here is example how you can achieve that, let me know if you don’t understand something.

code :

class ViewController: UIViewController {

    @IBOutlet weak var someBtn: UIButton!

    override func viewDidLoad() {
        super.viewDidLoad()
        configureUI()
    }

    //Setting up images for normal and selected state.
    func configureUI() {
        let image = UIImage(named: "image")
        let imageFilled = UIImage(named: "image-filled")
        someBtn.setImage(image, for: .normal)
        someBtn.setImage(imageFilled, for: .selected)
    }

    @IBAction func someBtnPressed(_ sender: Any) {
        // Toggle basically makes someBtn’s selected state either true or false when pressed
        someBtn.isSelected.toggle()
    }
}

Is there a way to call a function every 5 times a button is pressed (Swift)?

By : John Kelly

Date : March 29 2020, 07:55 AM

I hope this helps . You can keep the count of the total calls. Every time this number is divisible by 5 then you call displayMasteredWords.

code :

class Controller: UIViewController {

    private var numCalls = 0

    @IBAction func nextButtonPressed(_ sender: Any) {
        numCalls += 1
        if numCalls % 5 == 0 {
            displayMasteredWords()
        }
    }

    private func displayMasteredWords() {
        masteredWordsView.isHidden = false
        masteredWordsView.text = "You just mastered:\(readString)"
    }
}