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Swift Articles
Page 40 of 40
Check if string contains another string in Swift
To check if a string contains another string in swift, we’ll need two different strings. One string that we have to check if it consists another string.Let us say the string we want to check is “point” and the whole string is “TutorialsPoint” and another string is “one two three”. Let’s check with both these string in the playground.We can do this in two ways as shown below. Let’s start by creating three different strings.var CompleteStr1 = "Tutorials point" var completeStr2 = "one two three" var stringToCheck = "point"Method OneIn this method we’ll use the .contains method of Strings to ...
Read MoreCan I change the size of UIActivityIndicator in Swift?
It is possible to change the size of UIActivityIndicator in swift using some tricks but it’s not recommended to change the size. To change the size of activity indicator let’s first add an indicator on an empty screen and see how it looks. For this example, I’ll also change the color to red.Let’s see how it looks when we run it without changing the size of the indicator.Now, we’ll create an outlet of activity indicator in our view controller and in the viewDidLoad method of this class we’ll add the code below.We’ll use CGAffineTransform to change the scale of our ...
Read MoreHow to use MBProgressHUD with swift?
To use MBProgressHUD in swift we first need to create a podfile if it does not exist already.Go to terminal and change directory to your project directory then initialize pod and later install MBProgressHUD.cd /projectDirectory pod init open podfileThen in the podfile add the following line and go back to the terminal and run the below command in the same directory.pod 'MBProgressHUD', '~> 1.1.0' pod installOnce you run these commands MBProgressHUD will be installed to your project, now you can import this library in ViewController where ever you want to use, or you may create an extension of UIView controller ...
Read MoreHow to give dynamic height to UIlabel programmatically in swift?
To give a dynamic height to an UIlabel in swift we can use the frame property of UILabel. We can create a frame using the CGRect which allows us to give different variables like x position, y position, width, and height.Let’s create a label and add it as a subview to our view.let label = UILabel() label.frame = CGRect(x: 10, y: 40, width: 200, height: 50) label.backgroundColor = colorLiteral(red: 0.7450980544, green: 0.1568627506, blue: 0.07450980693, alpha: 1) label.textColor = colorLiteral(red: 0.05882352963, green: 0.180392161, blue: 0.2470588237, alpha: 1) label.text = "Custom label" self.view.addSubview(label)We can embed this in a function as well, and ...
Read MoreHow to use Swift to detect when AVPlayer video ends playing?
To detect the end of a video in swift we’ll need to create a video player, then use notifications to detect when the video stops playing. We’ll do this with help of an example in swift.Let’s create a project and drag and drop any video with extension “mp4”, select copy resource if required and add to the target of our project.Now we’ll programmatically first create a Video Player, then we’ll create url of the video in our project, and then we’ll play the video.var videoPlayer: AVPlayer!Now, in the viewDidAppear add the following code.override func viewDidAppear(_ animated: Bool) { super.viewDidAppear(animated) ...
Read MoreHow to detect swipe vertically on a ScrollView using Swift?
To detect swipe in scrollView we will need to make use of some tricks as scroll view does not natively give the directions of scroll made on it. We’ll see this with help of an example.Create an empty project, add scroll view to the view as per your requirement.Give them constraint as required in the application.From the object library, drag and drop a swipe gesture recognizer right above the Scroll View.Select the gesture recognizer, go to its attribute inspector and from there, select the swipe option and set the value as “up”.When you do this, now your gesture recognizer can ...
Read MoreHow to add a Submit button after the end of the tableview using Swift?
To add a submit button at the end of a table view, we can make use of table view footers. Let’s see this with help of an example where we’ll add a footer view to our table, and inside the table, we will add code for adding button at the bottom of the table view.Create a new project first, then inside the view controller add the following code which will initialize the table, add a section and a few rows to the table.func initTableView() { let tableView = UITableView() tableView.frame = self.view.frame tableView.dataSource = self tableView.delegate ...
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