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Apps/Applications Articles
Page 84 of 148
How to check if a text field is empty or not in swift?
It’s very easy to check whether text field is empty or not in Swift.You will first need to check whether text is available or not in text field i.e. it’s not nil, then you will need to check if its present then its empty or not. Assuming myTextField is your text field variable name, you can do the followingif let text = myTextField.text, text.isEmpty { // myTextField is not empty here } else { // myTextField is Empty }Above code will check if textField is empty or not.If you want to look at how the text field can ...
Read MoreHow to add a border to the top and bottom of an iOS View?
In this post we will learn how to add top and bottom border to view.In this example we will take as sample view and add borders to it.Step 1 − Open Xcode → New Project → Single View Application → Let’s name it “AddBorderTopAndBottom”Step 2 − Open Main.storyboard add a UIView to it as shown below.Step 3 − Add one @IBOutlet for the view, name it centerView.Step 4 − We will write separate method to add borders to this view. To add borders to this view we will create two layers with desired thickness. We will set the frame of ...
Read MoreHow do you animate the change of background color of a view on iOS?
In this post we will learn how to change the background color of view with animation.In this example we will change background color of view on click of a button. On clicking the button the background color will change to red, then on next click it would change to blue, on next click to red again.Step 1 − Open Xcode → New Project → Single View Application → Let’s name it “ChangeBGColor”Step 2 − Open Main.storyboard add a button as shown belowStep 3 − Add one @IBAction for touchUpInside of ‘Change Background’ button. Name the function as changeBackgroundClicked.Step 4 − ...
Read MoreHow to show current location on a google map on Android?
This example demonstrates how do I show current location on a google map on Android.Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.Step 2 − Add the following code to res/layout/activity_main.xml. Step 3 – Add the following dependency in the build.gradle (Module: app)implementation 'com.google.android.gms:play-services-maps:17.0.0' implementation 'com.google.android.gms:play-services-location:17.0.0'Step 4 − Add the following code to src/MainActivity.javaimport android.Manifest; import android.content.pm.PackageManager; import android.location.Location; import android.os.Bundle; import android.widget.Toast; import com.google.android.gms.maps.CameraUpdateFactory; import com.google.android.gms.maps.SupportMapFragment; import com.google.android.gms.location.FusedLocationProviderClient; import com.google.android.gms.location.LocationServices; import com.google.android.gms.maps.GoogleMap; import com.google.android.gms.maps.OnMapReadyCallback; import com.google.android.gms.maps.model.LatLng; import com.google.android.gms.maps.model.MarkerOptions; import com.google.android.gms.tasks.OnSuccessListener; import com.google.android.gms.tasks.Task; import androidx.annotation.NonNull; import androidx.core.app.ActivityCompat; ...
Read MoreHow to create Picker programmatically from array in iOS?
A picker view displays one or more wheels that the user manipulates to select items. Each wheel—known as a component—has a series of indexed rows representing the selectable items.UIPicker is one of the important components and almost used in most of the applications. You’ll see them mostly in form-based applications.You can read more about it here: https://developer.apple.com/documentation/uikit/uipickerviewIn this post, we will be seeing how to create UIPicker programmatically from and array and load array values into it.So let’s get started, Step 1 − Open Xcode and create a single view application and name it PickerSample.Step 2 − Open ViewController.swift, Since ...
Read MoreHow to dismiss the Alert with click on outside of the alert in iOS?
Understanding and implementing UIAlert can be tricky especially if you’re new to iOS Development, In this post, we will be seeing how we can dismiss the alert when the user taps outside the alert box.For this demo, we will be using UIAlert class, to configure alerts and action sheets with the message that you want to display and the actions from which to choose. After configuring the alert controller with the actions and style you want, present it using the present(_:animated: completion:) method. UIKit displays alerts and action sheets modally over your app's content.You can read more about it: https://developer.apple.com/documentation/uikit/uialertcontrollerSo ...
Read MoreHow to change screen brightness programmatically in iOS?
To change the brightness of the screen we have to use the brightness property of the screen, This property is only supported on the main screen. The value of this property should be a number between 0.0 and 1.0, inclusive.Brightness changes made by an app remain in effect until the device is locked, regardless of whether the app is closed. The system brightness (which the user can set in Settings or Control Center) is restored the next time the display is turned on.It’s an instance property, To implement this in your iOS Application (any application) add below line in viewDidLoad ...
Read MoreHow can I change the text color of the Navigation Bar on iOS?
Changing the text color of the navigation bar is tricky and easy at the same time, In this post, we will be seeing how one can change the text color of navigation bar in swift.So let’s get started, Embed your view controller in Navigation controller as shown below and name navigation item for that particular controller as a tutorial as shown, Now navigate to AppDelegate.swift and add below lines in didFinisheLaunchingWithOptions method.func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool { // Override point for customization after application launch. let textColor = [NSAttributedString.Key.foregroundColor:UIColor.green] UINavigationBar.appearance().titleTextAttributes = textColor ...
Read MoreHow to get the dimensions of a view in iOS App?
Getting dimensions of a view is easy, In this post, we will see how one can get the dimensions of a view in iOS.Let’s get started, Step 1 − Open Xcode and create a single view application and name it SampleView.Step 2 − Open Main.storyboard and add UIView as shown below, Step 3 − Create @IBOutlet of the view in ViewController.swift.@IBOutlet var sampleView: UIView!Step 4 − In viewDidLoad of ViewController.swift write the following code, print(sampleView.frame.size)Run the application to see the size.Complete codeimport UIKit class ViewController: UIViewController { @IBOutlet var sampleView: UIView! override func viewDidLoad() { ...
Read MoreHow to create a WebView in an iOS App using Swift?
As an iOS developer, you will come across multiple scenarios where you have to display something in web, for that we use WebView.As per Apple, − It is an object that displays interactive web content, such as for an in-app browser.So in this post, we will be seeing how to create WebView and load the data in it.So let’s startStep 1 − Open Xcode and create a single view application and name it WebViewSample.Step 2 − Open ViewController.swift file and import the WebKit module. import WebKitStep 3 − Add a property of WebKit in ViewController.swift.var webView: WKWebView!Step 4 − Add ...
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