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iPhone/iPad Articles
Page 6 of 9
How to integrate a facebook login in swift for iOS App?
Social logins in applications have become a very common thing these days. Facebook login is one of them, in this article we’ll see how we can make use of facebook login, to access basic user information and login to the application.Implementing facebook login in an application is a series of multiple steps, out of which even a single step can not be skipped.The first step is to register as a developer on: https://developers.facebook.com/Once you sign up as a developer and complete the required steps to sign up, you will be taken to dashboard. Which at present looks like as shown ...
Read MoreLazy loading of images in table view using Swift
To load an image in table view cell we’ll go through a series of steps.Create a table view, table view cell and add an Image view to it.Assign a custom class to the cell we created.In the cell for row at method write the following lines of code.let cell = tblView.dequeueReusableCell(withIdentifier: "CustomCell") as! CustomCell return cellTo download the image we’ll create a function and embed that into an extension.func setImageFromUrl(ImageURL :String) { URLSession.shared.dataTask( with: NSURL(string:ImageURL)! as URL, completionHandler: { (data, response, error) -> Void in DispatchQueue.main.async { if let ...
Read MoreHow to use the front camera in Swift?
To use the front camera in swift we first need to get a list of cameras available in the device we are using. In this article we’ll see how to get the list of devices and then check if the front camera is available or not. We’ll do it in a series of steps.Import AVFoundationCheck if the list of cameras existsFilter out the front camera if exists.guard let frontCamera = AVCaptureDevice.devices().filter({ $0.position == .front }) .first as? AVCaptureDevice else { fatalError("Front camera not found") }The devices() method of AVCapture returns the list of cameras available. From that ...
Read MoreHow to renew distribution certificate for iOS?
To renew a distribution certificate on mac we’ll have to go through a series of steps mentioned below.Use spotlight to open keychain access on your macFrom keychain access menu select Certificate Assistant -> Request certificate from certificate Authority.Fill the information there like Name, email and choose “save to disk”.Click continue and save to your desired location. This will generate a .CSR file which we’ll need to upload to the developer portal while generating our certificate.Go to “developer.apple.com”, login to your account, select “Certificates, IDs & Profiles”.Go to certificates, select production and click on the “+” on the topSelect "App Store ...
Read MoreHow to create NSIndexPath for TableView in iOS?
Index path is generally a set of two values representing row and section of a table view. Index path can be created in objective C as well as Swift as both are native language of iOS Development.IndexPathForRow is a class method in iOS. To create a index path we need to be sure about the section and row we need to create. Below are the methods of creating an Indexpath.To create an IndexPath in objective C we can use.NSIndexPath *myIP = [NSIndexPath indexPathForRow: Int inSection:Int] ;ExampleNSIndexPath *myIP = [NSIndexPath indexPathForRow: 5 inSection: 2] ;To create an IndexPath in Swift we ...
Read MoreEmail & Phone Validation in Swift
To validate email and phone in swift language we can use multiple conditional statements like if conditions, but that’s a long process and may contain 50-100s of if statements to validate email.So instead of conditionals we’ll use Regular expression. Swift provides NSPredicates which we can use to evaluate a regular expression and test them.Let’s see how we can use regular expressions to do the same.We’ll create a function which we can use as extension of String class or UIViewController to use through out the project.Add the following code to any class in your Project, or create a separate swift class ...
Read MoreDetect current device with UIUserInterfaceIdiom in Swift
To detect current device with iOS/Swift we can use UserInterfaceIdiom. It is an enum in swift, which tells which device is being used.The interface idiom provides multiple values in it’s enum which are.case unspecified @available(iOS 3.2, *) case phone // iPhone and iPod touch style UI @available(iOS 3.2, *) case pad // iPad style UI @available(iOS 9.0, *) case tv // Apple TV style UI @available(iOS 9.0, *) case carPlay // CarPlay style UIIn swift interfaceIdiom can be used in the following way:print(UIDevice.current.userInterfaceIdiom) if UIDevice.current.userInterfaceIdiom == .phone { print("running on iPhone") }When we run the above code ...
Read MoreHow to get the current version of my iOS project in code?
When we build an iOS application, by default it get a version 1.0 and build 0. Whenever we upload a new build to the app store, we need to change the version number. We can update the build number for testing builds. The version and build number are stored in the info.plist file in our project.Sometimes we might need to access the build or the version number in our application to perform some custom action.To get the version number we can use the following code and assign it to a variable or constant.Bundle.main.object(forInfoDictionaryKey: "CFBundleShortVersionString") as! StringTo get the build number ...
Read MoreWhat is embedded bitcode and what does ENABLE_BITCODE do in xcode?
Bitcode – Bitcode is an intermediate reperesentation of how the code looks. This code can not be used by us or can’t be installed on a device. When we upload our application to the app store It is uploaded as an bitcode and later converted to app binary by itunes/Apple.When the Intermediate code is created an uploaded to the App store or run on the device, a program called LLMV takes over the control and converts the Intermediate code to a Binary file which is x86 32Bit or x86 64 bit for the simulator and ARM for the actual iOS handheld ...
Read MoreHow to Add Live Camera Preview to UIView in Swift?
To add a live camera preview to our default UIView in swift we can either use AVFoundation framework of iOS SDK or native UIImagePickerController(). In this example we’ll be using ImagePicker as our aim is to present camera preview on the UIView and Imagepicker is suitable for that task. AVFoundation can be used when we need a lot of customization on our camera or different types of custom actions.To show a camera preview on the UIView we need to perform the following steps.Create a UIImagePickerController object.Conform our class to UIImagePickerControllerDelegate and UINavigationControllerDelegate.Assign delegates to the object we created in step ...
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